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3 USE&us s8 /, cs s/;z OPERATING LOCATION - A USAFETAC Air Weather Service (MAC) SELECTE DTI I E J2 13S&FETAc' "LIMITED SURFACE OBSERVATIONS" CLIMATIC SUMMARY "LISOCS" VAN NUYS CA MSC # N W ELEV 799 FT KVNY W PARTS A - F HOURS SUMMARIZED: PERIOD OF RECORD: HOURLY OBSERVATIONS: MAY 77 - APR 87 SUMMARY OF DAY DATA: NONE FEDERAL BUILDING "Approved for public release; Distribution Unlimit MAEVILLE, N.C u26

4 II II L A NT!S CRI ~--* limited SURFACE OSERVATIONS CLIMATIC SUMMARY 1-) STATION NAME: VAN NUTS CA STATION NUMBER: CALL IU: KVNY PERIOD OF RECORD: 1OURS SUJMMARIZED: LS! I-OURLY OBSERVATIONS: MAY 77 - APR 87 SUMMAPY OF OAY DA TA: NONE TIME CONVERSION LST IC GMT: -8 DATE PRODUCED: 04 AUG 87...

5 OL-A/USAFETAC/MAC/AWS ASHEVILLE NC LIMITED SURFACE OBSERVATIONS CLIMATIC SUMMARIES--LISOCS HOURLY OBSERVATIONS: INTERVALS. ALL RtCORD OR RECORD SPECIAL ObSERVATIONS RECORDED ON THE AWS FORMS 10/IDA Al SCHEDULED HOURLY SUPPLEMENTAL DATA: DATA DERIVED FORM EARLIER PERIODS IF AVAILABLE, ANDOR FROM ONE OR MORE REPRESENTATIVE SITES AND COMBINED BY A METEOROLOGIST. DESCRIPTION OF SUMMARIES: PRECEEDING EACH PART OF THE RUSSWO IS A BRIEF DISCUSSION OF TI-F SUMMARY INCLUDING THE MANNER OF PRESENTATION. OUPLY SUMMARIES CONTAINING "TOTALS" AND "ALL HOURS" ARE ONLY FOR THOSE HOURS SUMMARIZED. IN COMPUTING THESE VALUES THE VALUES IN THE I-HIER TIME GROUPS WERE ADDED AND DIVIDED BY THE NUMBER OF GROUPS. STANDARD I-I-OUR TIME GROUPS: IN ALL SUMMARIES SHOWING DIURNAL VARIATIONS, WE SUMMARIZE DATA USING TI-E FOLLOWING EIGHT T-HOUV TIME PERIODS IN LOCAL STANDARD TIME: OO, O300-OSOD, O6O0-OBO0, 09O-OO, TZLU-1VD, ISD-IT0, 1800-ZOO, LST. FOR A DCTAILED OESCRIPTION Ff EACH SUMMARY WITH EXAMPLES AND EXERCISES ON ITS USAGE, SEE USAFETAC/TN-3-OOI, "AN AID FOR ESING TI-C REV ISED UNIFORM SUMMARY OF SURFACE weather OBSERVATIONS" (RUSSWOI. TABLE OF CONTENTS STATION HISTORY PART A: PART B: PART C: WEATHER CONDITIONS AND ATMOSPHERIC PHENOMENA SUMMARIES SEE SUPPLEMENTAL DATA SECTION BELOW SURFACE WIND SUMMARIES ' PART 0: CEILING VERSES VISIbILITY AND SKY COVER SUMMARIES $ SUPPLEMENTAL PART E: TEMPERATURE AND RELATIVE PUMIDITY SUMMARIES PART F: PRESSURE SUMMARIES DATA SECTION--SUMMARY OF DAT DATA ASSMSC NUMBER: THIS NUMBER IS THE AIR weather SERVICE MASTER STATION CATALOG NUMBER. THIS NUMBER IS COMPRISED OF TIPF WMO NUMBER WITH I-F ADDITION OF A SUFFIX (O THROUGH 9. IN CASES WHERE TFERE IS NO DESIGNATED WMO NUMBER, A S-DIGIT NUMBER IS CRFATED IN AGREEMENT WITH WMO RULES PLUS A SIXTH DIGIT. THESE NUMBERS ARE ALSO REFERRED TO AS DAISAV OR USAFETAC NUMBERS WHI5H UNIQUELY IDENTIFY MORE THAN 15,000 REPORTING STATIONS WORLD WIDE. NOIE: THE FIRST AND LAST ICUR GROUPS MAY OR MAY NOT CONTAIN ALL THREE POURS. SEE HOURS SUMMARIZED ON COVER OR STATION HISTORY SHEET TO DETERMINE WHICH HOURS ARE INCLUDED IN THESE TWO HOUR GROUPS. LL r.

6 o....,ioo VAN NUYS CA VAN NUYS AIRPORT N W Ft. KVNY STATION LOCATION AND INSTRUMENTATION HISTORY WTYPI TAE AT TWIS LOCATION ELEVATION AOY[ ISt LATTIDA ITWlEITTA of CEOCIAPINfCAL LOCATT RAIR Of JC I STATIO I oof m TO TI(L IT5 WT RAI. P--r DA 1. Van Nuys CA Army Air Station 2. Van Nuys CA(San Fernando Valley Army Dec 42 SAWRS Aug 52 Jun 46 Jul 54 N Same W Same Unkn Unkn Linkn Varies Airport) 3. Van Nuys CA, Van Nuys Airport LAWR Jun Oct 61 Same 4. Air National Guard Van Nuys Airport ANG?6 Oct 6114 Aug 62 Same Same Same 799 Same Unkn Unkn Van Nuys CA Van Nuys Airport LAWR 15 Aug 62Apr 77 Sanme Same Same Unkn Same LAWR May 77 Apr 87 Same Same Same Unkn Des NOTE: Jul 46-Jul 52 Broken Period of record Closed Aug 54-Jun 61 IUEI AT SURFACE WIND AWIPFIET INfORMATION LOC OT 11 A CHNC il; OTION Of YPE 0, V?" A! o E HP IT ABOVE IEMAINS. ADDIIONAL EIUIPI[T.It H iasci FOA CHANCE TIAH$1NTTER IAICORDER thiso 1. Dec 42 Unkn Unkn None Unkn 2. Dec 52 Unkn Unkn None Unikn 3. Jun 61 On Tower F420B None 76 Ft 4. Mar 71 On Field F420 None 20 Ft 5. Mar 86 On Field F420 None 20 Ft USAFETAC A 0OOV 0-I 19*fs AOLAl. A **oua Cool" mo(i 91 t ES SIDE J i4

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8 watherp CONDITIONS AND ATMOSPHERIC PHENOMENA SUMMARIES WLATHER CONDITIONS SUMMARY I. A PEACENTAGE FREQ FNCY OCLURRENCf. SUMMARY OF VARIOUS ATMOSPHERIC PHLNO-LNA AND OBSTRUCTIONS 10 VISION. 2. DATA BASED ON HOURLY OBSERVATIONS. Y. SUMMARIZED BY THE STANDARD 3-HOUP TIME GROUPS BY MONTH, MONTHLY AND ANNUALLY iall YEARS COMBINIDI. DEFI NI TIONS: THUNDERSTORMS: ALL REPORTED IHUNULRSIORMS, TORNADOES AND waterspouis. RAIN AND/OR DRIZZLE: ELL REPORTED RAIN AND OR DRIZZLE FALLING TO THE GROUND Oll NOT FREEZiNG. FREEZING RAIN ANDOR FREEZING DRIZZLE IGLAZET: ALL REPORTED FREEZING RAIN OR FREEZING DRIZZLE. SNOW AND/OR SLEET. SNOW INCLUDING SNOW PELLETS AND GRAINS, ICE CRYSTALS ANU PELLETS. AND/OR SLEET lice PILLTSI. PAIL: ALL REPORTED HAIL. ALL PRECIPITATION: THIS CATEORY INCLUDES ALL OBSTRVATIONS REPORTING PRfCIPITATION. BECAUSE MORE THAN ONE TIPL OF PRECIPITATION PAY APPEAR IN A SINGLE OBSERVATION, THE SUM OF THE PfREENTAULS IN THE INDIVILUAL COLUMNS MAY EXCEED THE PERCENTAGES IN THIS COLUMN. FOG: ALL REPORTED FOG, ICE FOG AND GROUN FOG. SMORE AND/OR HAZE: ALL REPORTED SMOKL, HAZE AND ANT COMBINATION THEREOF. VLOWING SNOW: ALL REPCRTED BLOWING SNOWS INCLUDING DRIFTING WHEN REPORTED. DUST AND/O SAND: ALL REPORTED OUST, SAND, BLOWING DUST, BLOWING SAND AND ANY COMBINATION THEREOF. THE ATMOSPHERIC PILNOMLNA SUMMARY IDAYS WITHI INCLUn[S ONLY THOSE REP3inTS PHFN THE PHENOMFNA VISIBILITY LESS TIAN 5/8 MILES (IGCO METLRSI. ALL OBSTRUCTIONS TO VIIION: INCLUDES ALL REPORTS OF OBSTRUCTIONS TO VISIOPN (FOG TIRU DUST/SANDI AND RLOWING SPRAY. BECALSE MORE THAN ONE PHENOMENA PER OBSERVATION MAY OCZLR, THE SUM OF THE INDIVIDUAL COLUMNS MAY EXCEED THIS COLUMN. NOTES: 1. A VALUE IN THE TABLES OF ".0" INDICATES LESS THAN.Ol OCCURRENCE WHICH IS USUALLY ONLY ONE OCEuRRENCE 2. MLIAR STATIoNS IBSEfINNING IN JAN I681 AND SYNOPTIC REPORTING STATIONS RICONDLO ON THE AwS FORMS IrS/IOA AND TWANSMITTEO LUNGLI :E ONLY THE HIGHEST ORDER OF ATBOSPHr.IC PHENOMENA OBSERVED. NEGINNING IN JAN I97o, MEIA STAIUNS RICOPUEI ALL OBSERVED PPENOMENA BUT CONTINUED TO IRANSMIT ONLY THE HIGHEST ORDER. FOR EXA'PLE, IF THE ORSERVATION CONTAINED RAIN, FOG AND SMOKE, ALL THREE will APPFAR ON THE AWS TOR'S IUG/ IDA, BUT ONLY THE RAIN WAS IRANSMITTED LONGLINE. THIREFORE ONLY THE RAIN APP[ARS IN OUR DATA BASE F 0 POITRLY SUMMARI jat ION. THIS PRACTICE EFFECTS TfE PERCENTAGIS IN THE TABLES.

9 G.LOGAL CLIMIATOLOGY BRANCH PERCENTAGE FREQUENCY OF OCCURRENCE OF WEATHEP CONDITIONS USAFETAC FROM HOUYEY OBSERVATIONS AIR WEATHER SERBICE/RAC STATION NUMBER: 7228A6 STATION NAME: PAN NEYS CA PE'ITU OF RECORD: 78A-87 MONTH: JAN I RAIN FRZINO SNOW t OPG smore DUST I ITS IOURS I TGTMS C/DR RAIN C/OR FAIL WITH FOG F/OP SEOWING C/OP W/01ST TOTAL (IST) DRIZZLE C/OR SLEET PRECIP I-AL SNOW SAND TO 055 DRIZZLE RISION 00-02I 03-OS R.R P R 8.4 V A RIG1 C-Il I qto 12-IN u J I I P TOTALS I A L; STATION NUMBER: 7229B6 STATION NAME : VAN NUTS CA PERIOD OF RECORD: 7R-A7 MiNTfS: FEB I RAIN FRZING SNOW 2 ORG G"IOKE DUST I ORG FORS T TTmG S IDA RAIN C/OR IAL A IINH FOG P/OR REDWING C/OR A/ORGY TO0TA L fls TI I DRIZZLE C/OR SLEET RRECIP 4AZ7E SNOW SAND TO0 ORG DBRIZZILE BV151ON 07-OS 8 A.u L,6-OR *0.R S T19-3 I I 9.6 b AR4E, 12-IN 1 T.R IS' -I 1I I 84 I 9-20 I R q.a 9.6 0bN 1-3I9.4 R.N BIT7 0TOTALS U m8.5.0 A I S 07 7

10 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY OF OCCURRENCE OF WEATHER CONDIrTONS USA FET AC FROM HOU9LT OBSERVATIONS AIR h.eather SERAICE/HAC STATION NUMBER: STATION NAME: RAN NUTS CA PERIOD OF RECORD: TB-A?7 M3Y1TIP: MAR IRAIN FRZONS SNOW A ABS SMOKE OUST HOURS I TS TM S C/oR RAIN C/AR HAIL WITH FAG &IAR BLOWING C/AR A/TAST TOTAL ILSTII DRIZ2LL E/AR SLEET PACCIP HAZE SNOW SANA To TAS OR!1Z7LE VISION CO-C? 03-OS S CA AT2 C9-11I '.1 h,.a I.2 9.0c C IS-Il u TO I ! I i TOTALS A.?1 3.4 t20.5 1Z.0 S5SAV STATION NUMBER: STAT ION NAME: RAN NUTS CA PL T IODOF RCEACORD: 74-AT MONTH, APR I RAIN FRZINA SNOW I ABS SMOKE DUST I OAS HOURS I TSTMS C/AR RAIN C/AR FAIL WITH COG C/TA BLOWING C/OR W/oAST TOTAL ILSTI I 08122C C/OR SLEET MACAP HAZE SNAW SAND 10 OBS I GRIZZE VISION 00-0? I9.7 ' l.a l ? 7, I 3 3.a INi-IT T.T A9A IP TOT ALS I. Z S39I

11 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY Or ICCUPOENCE OF WEA THC CONGITrIONS USA FEYAC FROM HOURLY OBSERVAIIONS AIR WEATHER SEROICE/MAC STATION NUMBER: 722R86 STATION NAME: RAN NUTS CA PIPInG E RECORD: 7 T-AR6 CONIl-: MAY I RAIN FRZING SNOWS 0 BS SMOAE DUST I OBS HOURS I IMS C/OP RAIN C/OR VAAIL WITH FOG C./OR BLOWING C/OR 6/0850 TOTAL CLSTI DRIZZLE C/OP SLEET PRECIP HAZE SNOA SANG TO OPs IDRIZZLE PISTON 0Y-OS YU U ' Cq-Il.A.B ) !2D u I A.Z isa.o 9 30L IA-20 I I TOTALS I Z9.2 S64b S TA TION NEMRER: STAT ION NAME : PAN NUTS C A PEPAT 10O PECOBO: 77-A6 MONTH : JUN1 IRAIN FRYING SNOW 0 BBS SMOKRE DUST % ORS HoupsI IstOS C/TA RAIN 6/TB HAIL WITH FYG C./OP BLOWING C/OR S/GAS? TOTAL (LSTI D RIZZLL C/OR SLEET PRECIP HAZE SNOWA SAND TO 0BS IORIZLE VISION 0(3-02I 0l305 I ' (6-CA OS BOO 0' CO IS-Il I j I T.?7 1Y.S 750 IP-7O Z.0 000D *TOTALS I cl

12 GLOBAL CLIMAIOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PEPC.NTAGE FREOUENCY OF 3CCURRENCE OF WEAThP CONITIONS FROM IOU9LY ObSRVATIONS STATION NUMER: 7R2686 STATICN NAME: VAN NUYS CA PF IOD OF RECORD: M917T: JIUL..,,,..,..,....,.,,.,,...,,..,, ,.. ),.....,,...,......, ,... I 1AIN FRING SNOW % TO SMOKE OUST I Tes HOURS I TSTMS [/OR RAIN CIOR VAIL WITH FOG.iOP BLOWING C/OR W/08S TOTAL TEST DRIZZLL E/OP SLEET PRECIP HAZE SNOW SAN TO 00S I DRIZLE VISI ON ,,,., , DO-PT ?4* n6-o a "' s: ns-l I.I z 12-1 I.1 V I1 I4,O 4.5 9?3 18-7O TOTALS STATION NUMAE: STATION NAME: VAN NUYS CA PL9IOO or RECORD: 77-A6 MONTH: AUG I RAIN TRZING SNOW I OS SMOKE OUST HOURS ISTMS Elop RAIN E/OR IAIL WITH FOG C/OR SLOWING C/OR WIOBST TOTAL ILSTI DRIZZLE /OR SLEET MREl1P HAZE SNOW SAND 10 OBS I DRZLE VISION CT-ON.9.9 IN ( N N Cq- I 'i.$ 93U I IA-T0 I I l.a I,.H 1.2 " TOTALS. I1.,.T ON3O I

13 GLOBAL CLIMATOLOGY PRAANC- PERCENIAGE FREOUENCY OF JCC ULRENCE OF WEAT' I C'S1[IONS USAFETAC FROM HOURLY OBSERVATIONS AIR WEATHER SERAICE/MAC STATION NUMBER: 722q6b STATION NAME. VAN NUYS CA L-IOG OF "[COAO: PC! 16: SEP'...,..,......,,.,,, ,.,....., ,, I RAIN FR/INS SNOW I GBS SOKE DUST I OBS HOURS I TSIMS C/O RAIN 6/OR FAIL WITH FOG C/OR BLOWING C/OR W/C73 TOTAl 4LST) I DRIZZLI C/OR SLEET PRECIP FAZE SNOW SAND T0 03S I DRIZZLE VISION 0C-02 El -O IN S b IS.6 o.i I1I 2 Z '1.3 7T.T I q I I~. 1l, 1 11.I l.a TOTALS i.6 4?.,, , *......,,.,* ,..,...,,.,,,....,... *... STATION NUMBER: 722A6B STATION NAME: RAN NUTS CA PE 0 IOD OF RECORD: MINT": OCT., $,...,...,......,,, ,... I RAIN FRZING SNOW % OS SMOKE DUST % 04% FOURS I IS TS clor RAIN C/OR PAIL WIIP FOG./OR BLOWING C/OR W/DST TOTAL ILSTI I GRIZZLE 6/OR SLEET PRECIP "A,7 SNOW SANo TO o08 DRIZLE VISION,,,.,,..., ,,.. *.....,,...,...,o ,,... I...,.... (T3-0S 1.5 l.s r8 2U h I I 11.4., T I - I A.A TV 4 101*651S ' ?T '2. 25q

14 GLOBAL CLIMATELOY PRANCH PERCENTAGE FREQUENCY OF JCCUARENCE OF WLATlIf CONJDITIONS USAFETAC FROM FOULLY 08SERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAME: PAN NLYS CA OEAIOO OF PECOPO: 77-6 M"NTH: NOV o. ** ** oo oo oo ** *,...,..., , ** I RAIN FRING SNOW % OBS 6'OmE OUST % ORS HOURS I TSTMS ALOR RAIN C/OR HAIL WITH FOG C/OR BLOWING C/OP W/CBST TAL (LST) I DRIZZLE /08 SLEET PRECIP HAZE SNOW SAND 10 oes OPlTZZLE VIS 11ON......*..o*., o o..*.*.., o.....**.. **. *o ** I 1.b c6-cr [f-ili.1 8.U I ?? J 93L, TOTALS I N S ,,,... * *.,,,,..oo *... STATION NUM[ER: 7,2 66 STATION NAME: VAN NUTS CA PL"IIOD OF PLCOpO: MONTH: DEC * ,.,..*.,.. * ***.,*.. * **. o* *., **..* I RAIN FRZING S4O w % OIS S"OKE DUST 1 08S POURS I TTMS &COR RAIN C/OR fail WIT- FOG EIOR LOWING C/OP WI0ST TOTAL ILSTI I DRIZZLE C/OR SLEET PRECIP PAZE SNOW SN0 TO OB DPI 2ZLE VISION ,.,...,,.,,....**.o...,,. oo... **... o....o.,,..,.,..o L -- 2 I 23-fI5 48., )3.2 12,6 5.1 S Sn-If I ,' IS-IT 1,b 5.b I r T TOTLS A.6.T , ,.,, oo.**.*.....,,.,...o.o

15 G LOBAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY OF OCCURRENCE OF WATHEY CONOITIIONS USAFETAC FROM HOURLY OISERVAT70NS AIR WAlt7IER SERRICtIMAC STATION HNjMP.ER: STATION NAME: VAN NUYS CA PL - 101) OF RECORD m 'N T I: ALL IRAIN rrzing SNOW S..OKE DUST t 09S I-OURS I TS TMS L/06 RAIN E/06 I'AIL WITF FOG [/OR BLOWING C/OR U/CBST TCTAL (LSTI D RIZZLE 106 SLEET PRECOF' HAZE SNOW SAND To 065 ORI ZZLE R1I I N JA L lcf2l FEB I PTT7 MAR I U.3?.U G S5q APR j lb.6 g TI MAY , 9.2 ' JUN I '1I. 1 '37.9 "~ JUL z b5b ALG ' Sb3L SEP *"u 54 3 OCT I N S5; NOR b DEC I TOTALS I It.s.0 zo

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17 BIVARIATE PERCENTAIjE FRlUENICY TABULATIONS OF SURFACE WINDS DATA DERIVED FROM HOLRLY DATA. PRESENTED ARE THE PERCENTAGE FREQUENCY OF VERSUS WIND SPEED IN KNOTS IN INCREMENTS OF BEAUFORT CLASSIFICATIONS. WIND DIRECTION TO 16 COMPASS POINTS. CALM AND AARIAALE PERCENTAGES ARE SPOWN VT BOTH DIRECTIONS AND SPEED, AND IN ADDITION THE MEAN WIND SPEED IN GIVEN FOR EACH DIRECTION. _ DATA PPSENTED BY THE STANDARD 3-HOUP TIME GROUPS BY MONTH, MONTHLY AND ANNUALLY (ALL YEARS COMBINED.. A SEPARATE ANNUAL TABLf PRESENTS T E SAME BIVARIATE DISTRIBUTIONS WITH IMPOSED CEILING/VIsIrBILITY LIMITATIONS: WHEN VISIBILIIIS EQUAL 10 OR GREATER TFAN 1/2 MILES, THE CEILINGS APE ZOD TO 1i0 FEET AND/OR AHEN THE CEILING IS EQUAL T OR GRLATER THAN 200 FEET, THE VISIBILITIES ARE 1/2 THROUGH 2 1/2 MILES. A PERCENTAGE VALUE OF ".0" IN THESE TABLES INDICATES ONE OR MORE OCCURRENCES AMOUNTING TO LESS THAN.052.._ C-l iml

18 GLOBAL CLIMA7OLOGY BRANCH USAFET-AC AIR WEATHER SERVICE/MAC PERCENTAGE FREOU7NCY OF OCCURR-NCE Or SURFACE di43 DIRECTIO4 VERSUS WIND SPEED FROw HOURLY 03SERVATIONS STATION NUMBIER: STATION NAME: VAN NUYS CA PELIOD OF RECORD: MONTI-: JAN HOURSILSTI: i..... N; -.P... ".. " WINO SPEED IN 8640TS OIECTION I 1-3 N-b N GE S6 TOTAL MEAN LOGREESI x I WINO N I 2.N 3.2 N.? 1. " 11.3 i.2 NNE NF I1.6 1.b N.? ENE E FSE SE R.3 SSE S SSW SW R WSW A W WNW N.3 NW NNW b.4 IS.0 VARIABLE I CALM IIf I //I f / / //I / ///'/II/l//I////I///II////I 59.1lII TOTALS I TOTAL N-JMSPR OF OASERVATIONS: IZ,-4

19 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FREOU'NCY OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FROM HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VA4 NUYS CA PEIOD OF RECORD: MONTH' JAN HOURSILSTI: J dind SPEEr IN KNOTS DIRECTION I I-I N GE 56 TOTAL MEAN IDEGRrES) I I WIND N NNE NE ENE S L , E SE SE., SE I S SSW sw WSW ? d I WNW,I NW NNW I I.. VARIARLE I... ' CALM I2./////j/// /j / /I// ///j// j 62.8 //l/ TOTALS I IOTAL NUMBER OF OSSERVATI3NS: 835

20 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURRENCE OF SURFACE WIll UIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSFQVATIONS STATION NUMBER: STATION NAME: VAN NUYS CA PEOID OF RECORO: 7P-87 MONTH: JAN HOL'Rs(LSTI: C W N "S [[ I N O S... WIND SPEE3 IN KNOTS DIRECTION I o N GE 56 TOTAL MEAN IDEGR ES) I t WIND... N.? Q l, NNE NE.6.5 I.? 6.6 ENE E use.2 3.P T.' SE ?., SSE S.? S 1.8,1?.6 S* SSW ( 8.9 S W, I 1. A 4 WSW 2.3 N W S WNW S7 NW.I l.s NNW I In.1' I?. BARIABLEI[ CALM //////I//////f//#////J //// // #/ //t/// //#///I////////////// 3./ 36.7 //I/ TOTALS * A 2b, TOTAL NUMBER OF OPSERVATIONS: 930 0

21 5L00*1 CLIMATOLOBY 9RANC, PERCENTAGE FREQUENCY 0F OCCURRENCE 0F SURFACE WIND DIRECTION VERSUS W IN I SPEE) USAFETAC FRO4 HOURLY OBSERVATIONS AIR WEATH~ER SERVICE/MAC STATION 4040CR: SOAT ION 4A ME: VAN NUYS CA P F RECORD: MONTH: jan IOLRSILSTI: WiIND SPEED IN XN075 DIRECTION I NA-SO GE 56 T 0 AL MEAN IDEGP:ES) I % WINE) N I %.4 ;4. NNE l. NE ~ E NE P. 6.6 ESE.2 S.2 N.0.8.1I SE I SSE S SSW sw T WSW A WNW S %W NNW ?. CAL" /UIlUi/////l//i////////////iI/#/i////////i// 20.3 It//// TOTALS I TOTAL ORSE8VATIDNS: 9130

22 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY OF OCCURRE'NCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED USAFETAC FRO HOURLY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER: 722R4S STATION NAME: VAN NUYS CA P[ qod OF RCORD: MONTH: JAN HOURStLSTI: I WIND SPEE) TN KNOTS DILCTION I I-I j7 Z O 41-R GE 5b TOTAL MEAN IDEGA:ESI % WING N. N N.T Ito NNE NE A.R E E Sz ISE SE SSE l SSW. I Sm z WSW I I.4 1.1? WNW NW I1.4 NNW VARIABLE I TOTALS I.5 29.t TOTAL NUM9ER Of OBSERVATIONS: 930-4

23 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PEICENTAGE FREQU:NCY OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 78-R7 MINTH: JAN NoU3ISILSTJ: 18D DIRECTION I I WIND SPEE3 IN KNOTS 1-3 N-b l-lb N-NO GE 56 TOTAL MEAN (DEG0RESP I W IND... N 1.5 B9 N NNE.A C HE q l N'.4.2 1A ENE.4.1 c. 5.8 E ESE b SE SSE " S ? '. l SSW SR WSW.T " W WNW.7 1.?.S NW NNW I S VARIABLE I CALM 2b.3 lill l/i//ii//iii/ 26.3 IIIIII TOTALS I I TOTAL NUMBER OF OBSERVATIONS: o. o ,,,..,

24 GLOBAL CLIMATOLOGY qrvncp PEICENTAGE FRCQU:NCY OF OCCURRENCE OF SUOFACE end 0IRFCTION VERSUS WIND SPEEO USAFETAC FROM HOURLY OBSERVATION, AIR WEATHER SERVICIMAC STATION NUMR: STAION NAE: VAN NUYS CA PL-100 OF RECORD: MONTH: JAN HOURS ILSTI: 20n-23P0 I WIND $PEE) IN 8903$ OIRECTION I I- 3 N-h ? Z GE 56 TOTAL MEAN IOEiREES I 2 1 WINOU,,,,,,.,.,,,,,,,,..,,,, ,.,o oo.o..oo oo...~o,o.....o.....,, N I.? NNE e.3 HE f * * F3 FNE.I.....C c ESE I. 2.i SE.I I.? 5.9 SSE.1 I 1.? S S5W I S I.2 5.9t 9. W5W I.2.5 o w.v WNW I b4.0 N a.9 NW o jc. o VARtIABLE I TOTALS I TOTAL NUMMER OF OPSERVATINS: 921 Sld

25 GLObAL CLIMATOLOGY BRANCl6 USAFETAC AIR WATHER SERVICE/MAC PERCENTAGE FREQUeNCy OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WINo SPEED FRO4 HOURLY OBSEqVATION' STATION NUMPER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 7R-M7 MQNTH: JAN O3URStLSTI: ALL I WIND SPEE) IN KNOTS DIRECTION I I-I ? O 4T-q GE 56 TOTAL ME a IDEIR-ES I T W UNE,..., , ,......, N A." ?. NN[, " NE, , ENE.0.5.I.. L.1 2..A.9.3.1,9 N.J E SE,l,r 2.3,8.4 1.Y 6. SF.I SSE a S SSW.D I.'4 5.7 SW WSW.I 1.9.8, w.2 1.p WNW NW I NN I S " V,. WI.. BL., ,., , TOTALS I IY ,.,,o...,......, ,.,.,,.....,..,...,.,., ,....., , TOTAL NUMPEP OF OPSERVATI3NS: e

26 GL03AL CLIMATOLOGY BRANCH PERCENTAGE rrequency OF OCCURRENCE OF SURFACE 4Il) DIRECTION VERSUS IN 0 SPEED USAFETAC FPO HOURLY ORSERVATIONS AIR WEATHER SERVICE/MAC STATION NIMPER: 722R86 STATION NAME: VAN NUYS CA PEPIOD OF R[COPO: 79-RI INTF-: FEB POURS(LSTI: 3300-OSUC... i...wind... "... I WTND SPEC) IN KNOTS OIRECIION I D 4I S5 GE 56 TCTAL -[AN IDEPEESI I % winu ,...,,,.,......,,,,..., , o..., N ITS I'." NNE NE I INF E.9 I,! " SE S.' SSE.9 1.9,. S S.C SSW Sw WSW I 2.7?.T 7 r WNW I.9., NA 9.p A. l.a 1. j CAL I,, 61.9 lle TOTALS I R.,, , ,...,,..,.....,..,, ,...,.,.....,.....,,,,. ItTAL NUMBER OF OPSER VATIONS: 113 mmiij

27 GLOBAL CLIMATOLOGY RRANCI- PERCENTAGE FVEQU-:CY OF OCCURRENCE Of SJFACE WlN7 DIIRFClION VERSUS.IND,P-El usafe AC FRO4 HOURLY OBSERVATIONS AIR WEATHER SERVICE/MAC 5T IION NUMMER: 7:ZBV8 STATION NAME. VAN NUYS CA PiQIOU or VECORO: 3q-p? MINNw: FE-P HOLVSILSI I: l6j2-d3v??..... o o.. o...,,...o..... o...o ,,.. o *,,...,,... I WIN 0 SPE[) 1N KNOTS UI-E[TICN I I-V Nt 710 l-lb ; I b. 5b ICTAL M EIA (OEGRES I I 1 0II,.. 4 I iii.1 j IIf lll 2.0 I III 6 I l i l I.I I * IDU 'NF -.l.3 4.' 03 I..0? NE I.S.1.7 c I b f SE S.9.3 I.2 5,5 -Q Sw.4.. SW, P.9.- I N, WNW.q 4. 9 NW NNW V.6 I33.'..., o ** o... o... o VARIABLE I TOTALS I u I30.n 4.I TAL NUMBEP Of OBSEVABIIONS: 153

28 GtObAL CL1M&ILOLy SRANCA USAFETIC AIR WIA TR frvice/mac PEE'TAGE FREQU'4CY OF DCCUR RNEE OF SU4FACE a ' 1 UI R CTIN VERSUS iino SP.E3 FROM HOURLY OBSFRVATInN' STAIION NU"9EQ : 7224'9 S13IION NAM: VA' NUTS Z.A PPIN) OF RECORD: 7q MnNTIH: FE9 HOLPSILSTI: 3?37-1IC *......, *... I wind SPEEI TN KNOTS DIRLCITO I I- -F 7 I-IL p Sf 96 TOTAL MrL to, (Q:(ES I I N2... ;, ,......,i;...i Z; NF....A ENM C I' 1O EN... F E i.. T ST I S 6.' 7.6 s9e S I s.',. 54W 1.9 '.2.2.1,.1." $ , s W.2 I 3.4' ' 9.) 4NW N... N w cat 24.'~i TO TAL?.4 2b * * * O1AL NtIMRF 0 nf OFQ,F val INS : b- 6 1a

29 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERAICE/MAC PERCENTAGE FREQUENCY OF OCCURRENCE OF SURFACE.143 DIRECTION VERSUS WIND SPEED FROI HOURLY DBSERVATIONS STATION NUMBER: STATION NAME: VAN NUTS CA PERIOD OF RECORD: MONTH: FEB HDURSILSTI: MIND SPEED IN KNOTS DIRECTION I I-3 4-b 7-A ? O GE 56 TOTAL MEAN foegr7esi I WING N NNE ' 9.4 NE I 9.1I ENE E T 6.7 ESE SE A SSE N.I 3.3, S.2 4.S TSW I OW WSW P.I I WNW NW.7 2.D io.9 NNW CALM 1RALE TOTALS I TOTAL NUMBER OF OBSERVATIONS: 846 S

30 GIOt3AL CLIMATOLOi' BQANC6 PERCE4rAGE FQ 07.40! Of OCCURRENCE OF SUQFACE WIND' D143CTIDN VFqSUS WIND4 SPEED usafetac F UQ YATION AIR WEATPER4 SERVICE/MAC S 7A NON NUMPCEP: 7'22886 STATION NAME : VAN NUTS CA PtL0OD Of RECORD: MDNTH: FER,OLP5ILSTI : 1% DIRICTION WIND SPE) IN KNOTS I b ,? GE S6 t T A L MEAN NNE I NE E NE H Ei 2. t E SE SE I ? 6.3 5SE 4.s 10 I I S I ID.q P.3 SSW I Sw WSW I. T I W T.. WNW A N W I i I TOTALS 2? TOTAL OF : 14b

31 GLOBAL CLIMATOLOGY BRANCP PERCENTAGE FREUENCY OF OCCURRENCE OF SURFACE 11N)J OIPELTION VERSUS WINO SPEED USAFEYAC FRO4 HOURLY OBSERVATIONS AIR h.eatker SERVICEIMAC STATION NUM4ER: 7296 SIAT ION NAME : V A NUYS CA PE RI101 OF RECORD: P05TH: FEe HOUJRS( L S TI: )3O I WIND SPEE) IN XNOTS It? C TI ON I M-40O 1I GE 56 TOTAL MEA% IDE&RCS) 1, W A114U N I..8 N.N NNF I NE f E NE I E I.2 3..R F SE I SF I S SF S I S.8 SSW. I sw.4 3N. 5 4.A N.9 6WW W WNW n 8.1t NW I R. 7 NNW I ? 91 7 I.9 TO TALS I TOTAL NUMBER OF OBSERVATIONS: 886

32 GLOTAL CLIMATOLOGY BRANCH PE4CENTAGE FREQU74CY OF OCCURRENCE OF SLIMtFOCE WIN) DIRECTION USAFETAC FRO4 HOURLY OBSERVATIOIS VERSUS WINO SPEED AIR WEATfHER SERVICE/MAC STATION NUMBER: 7i2.R86 STAT ION NAME: RAN NUTS CA PERIOD OF RECORD: 7R-87 MONTH: FEB HOUpSILSJI: 21E I WdIND SPEE) IN KNOTS DIRECTION 1-3 N lb ?? 2R-33 ON-NO 41-N GE 56 TOTAL MEAN ICEOGRZE S I % WIND N NANE I NF I FNE I 7.7 S 0 L I 2. c V8 7.1 E SE I SE.1 I SFE I A.R S I SSW I SW I WSW I N.Y A a.s ANW NW I Il11.- NNW II.q VARIABLE I TOTALS I N.MP ~ TO3TAL SUMMER OF OBSERVATIONS: 826

33 GLOBAL CLIMATOLOGY BRANC- PERCENTAGE FREOU-NCY OF OCCURRENCE OF SURFACE, 134 DIRECTION VERSUS WIN D SPEED USAFETAC FRO4 HOURLY OSERVATI7"C AIR WEATf-ER SERVICE/MAC STATION NUMBER: STATION NAME: VAN NUYS Ca PEPIO0 OF RECORO: R-8? MONTH: FEB HOLRSILSTI: ALL WIND SPEE) IN KNOTS DIPECIION I ) GE 56 TOTAL MEAS (DEGREES I WIND N I. J.F NNE NE EN I ,.9 E F SE SE ; 7.9 s$ A C ot 5b 7.r SSW R W, WSW I R w.? , WNW NW NNW I VARIABLEI" = CALK // / // / // //// / / / // / // /// / / // / // / Z8.3 1///I// TO TALS I I o , ,.,..., ,..,..,,..,o... o,...,...,,.....,,.....,... o... TOTAL NUMDEP OF OPSEVAII)NS: I

34 GLOhAL CLIMATOLO0Y BRANC- PE4CFNTAGE FREQUENCv OF OCCURRENCE OF SURFACE WIND 01 ELTION VERSUS WINU SLED USAFETAC FRO4 HOURLY OBSFRVATIONS AIR WEAIT-EP SERVICE/MAC STATION NUMRER: 7?2886 STATION NAME: V44 NUYS CA PERIOD OF RECORD: 7q-91 MONTH: MAP HOLRSILSTI: 300-0CO,.....,., ,... o,.. o,,,.....,,..,,o.,..,,. +..,,, ,.,...,, I WIND SPEE) IN KNOTS DI0ECTION I 1-i n ? N-NO HI-HI R-SS re Sb FVTAk "EAN 1DtG00:S) I % WINI N A.~ NNE NE.,Q :.' E I ESE 4.P 1.2 I B SE I r.8j, SSE 2..2,7. 11, 5S 42.s. SSW,o SW.v..0,Q S. r WSW 1-6 S.0D.7 W s.cr. WNW.. 9 c. NW.p d 1.6 R.[E NNW.A VARIABLE I CALK / / / /// / 6/0. O5 ///1/ TOTALS I A TOTAL NUMBER Of OISERVATI3NS: 124 0

35 GLOjUAL CLIMATOL06Y AAANC- PE'?CENTAGE FREQU-NCY OF OCCURPNCE OF SU7FACE dlin1 DIREC71ON VERSUS WIND0 SPEED USAFETAC FRAN HOURLY OBS!RAATIONS AIR WEATIER SEANICE/MAC STA TION NUMPEP.: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 78-8A7 "nnth: MAR HOUqS(LSTI: D WIND SPEE) 14 KNOTS 2 2 DIRECTION Tl N 1-4O 7 N8B55 GE 56 7TTA L MEAN N I * NNE.2.?.G NE.4 SN3. 6.3j ENE I..7 *R 5.0 E ' 6. FSE S.9 6. SE I SSE l.4 S '. SSW P 4 N.4 SW.1. ~.2.R 6. WSW 3.-6 *A V A I WNW.2 1.'. 7. r S. 7 NW I N I A 1I.N f, I TO TALS I P I T0TA1 NUMPER OF OPSERVA ti3ns: -3OO

36 GLOBAL CLIMATOLOGY BRANCf- PERCENTAGE FREQUENCY OF OCCURR7NCE 3F SURFA C WA') DIRECTION VERSUS WIND SPEED USAFETAC FROM HOURLY OBSERVATIONS AIR WEATI.ER SERVICE/MAC STATION NUMPER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: MAR HOUPS(LST : D IDEGREES) I I winl N s NNE I Nr I ENE *4.l L I T ESE SE, o SSE I * S I.1 S SSW I WSW I ,b, , b.y WNW I.4, q Nw [ T.T I1.r NNW I l 4ATARIALE I""" CALm /// 37.2 Il//// ;OrALS a 2.o TOTAL NUMMEP OF OPSRVA T0NS: 930

37 G LObAL CLIMATOLOGY STANC- PERCENTAGE FREQU7NCY OF OCCURRCRCCE OF SURFACE 4149O LJIrCrroR VFRSJS d1n0 SPEFU USAFET AC FPOM HOURLY ORSERRATIONS AIR OAQIIER GFRRICE/MTC STATION NIJRPET: STAT ION NAME: VAN RUTS CA PLIUTOC OF RECORD: INTH: MAR HOURS(LSTI: 12flO-1403 I jiro SPEE3 TN KNOTS DIRLIION ,? S oc 56 TOTAL 8584A I DE.E R w7 I N NNE I* ENE f SE S I ,T.6 SE 5 s SSE I4.5 6.q [ S ? '. 8. SW I. ~.R WSW sww NA.4* NNWA I l.1 4.7' It.1 TOTALS I n. 3 1N ,.[) 7. f TOTAL NURRER OF 08R.E RV ATI13NS: 930

38 GLOLAL CLIMATOLOGY 884NC PLYCENTAGE FPEOUNCY OF OCCURRENCE OF SU4rACE WIND DIRECTION VERSUS WIN D SPEED USAFCTAC FRO" HOURLY OBSERVATION' AIR WEAT -ER SERVICE/POAC STATION NUMa.L: STATION NAME: VAN NUYS CA re'ioo Or YECOD: MCNTH: MAP HOURSILSTI: I WIINO SPEE) TN KNOTS UIECTION I ? GE s TOTAL MEAN IOAIbPRSI I W I1ND N I NN4.2 3 * 10,8 NE.3. i1i 8.' ENE A5. E I E sr A SE I. 7 f s S 3. T s %* A.7 SW ,.4 7.R WSW I.1 S W P WNW q 3.7 1,.9 NW ~3. 7 NNW !.b 8481*818 I TOTALS I 21.c l I TOTAL NUMBEP OF OBSERVATIONS: 930 ej,..=..

39 GLOBAL CLIMAI'LOLY BRANCE PE7CENTAGE FREOU-JCY OF OCCURRENCE OF SJIFA:E WIND UIT7CTION VERSUS WIND SPEED USAFLTAC FRO4 HOURLY OBSERVATIOrN AIR WEAT IER SERVIEL/MAC STATION NUMPER: STATION NAME: VAN NUYS CA PCEIOD OF 4ECRD: MONTH: MAR HOUPSILSTI: JG P E " ; ( (TS... I WINO SPEE3 TN KNO75 DIRECTION I l HO T-N7 4R-S5S GE 56 TOTAL MEAN tde UEES t WI NO NNE NE II1... ENE..N.1 E.1 3., F SE b0 SE I ,2 6.? T.I SSF A 6.'Q S SW. s WSW.2 b.f0 4.3.z ', ? WNW Nw I.E NNW, R ii,9 VARIATLE I I CALM I /I/I 1 1//II // ////////////i /////I/II////I/I/ t IllI TOTALS I 4,1 ': p , TOTAL NUMBER OF ORSERPITIONS: 931 ak4

40 GLObaL CLIMAIOLOGY 8PAN0- PERCENTAGE FPEQUNCY or OCCURRENCE OF SURFACE W'N OIRECTION VERSUS WIND SPEED USAFETAC FROI HOURLY 09SERVATIr'N AIR WEATHER SERVICE/MAC STATION NUMBER: 7286 STATION NRIME: VAN NUYS CA PEPIDo OF RECORD: MH PTH: MAR HOURSTLSTI: 2 1 ] ,.,, ,..,..., , ,..., I dind SPEE) IN KNOTS UIRECTION I ( , JR GE 6 TOTAL MEA ADCSRZESA I I WIND N I.r, *S 4.4 A].4 NNE NF I. 1. I1.T NE E '. ESE 4 N q.7 SF 2.1 1, '. %S( S I SSW I. 4 SW " 47 WSW.3 b p. W. l.a WNW.7 I. Q No I NNW.1.P 1.0.9,3 x.i 11.' T ARLIB I ""..,.... o...,,,, ,.,,....,,, ,..,,,... o....,...,...,......,, EI~I

41 GLOA4AL CLIMAIOLOGY BPANLP PERCENTAGE 'OLQuENCy OF OCCURRENCE OF SURFACE WIND DIplCIION VERSUS WIN D SPEED ISAFETAC FROl HOURLY OBSERVATIONS AIR WEATI-ER SERVICEL/MAC STATION NUMPER: f722or STATION NAI: VAN UYS CA 'E'llOO OF PECOPD: 7 -R7 MONTH: MAP HOURSILSII : ALL.,...,... *......,.**...,....,.,,*.., , **..,, ,.., WIND OPEE) IN KNOTS OIPLCIION I I-I A-b 7-I0 Al-it R-3O 3-NO I-47 4P-S5 SE G 6 TOTAL M-AN IDEI,0ES) j WING.,,..,,,.,.,..,,...,..,,.....,....o.,.., *....,.., N I.1. 0.? R NNE o..3.1 *7.1 NE,. 0o FE F.97 S j.v.3.0 T.O L.. ISO V.0,, ? SSE.T la 7.4 'S.7' T.' V.2.R.1 A.N 7.u S I. 3.A '.I ' S SW..' '. SW IA.i WS IW, V M,I I. qa 1 NwI.f 1.'.I.0 0.q2. I NNWi ,.0.3 V.0 1f.l VARIABLE I CAL" 2ii//If///////f////////~/I/////I,// 7.4 I// TOTALS Q.A ,,,o......,, **,.,.,,,,,,.....,,,,,...,,...,...,,.,,......,. o,.. TOTAL NwMBEQ OF OFITSRVATIONS: 5d7 Sn'.

42 4 GLOpAl CLIMATOLOGY 9PANC PEQCENTAGE FRLQUNCY OF OCCURRENCE JF SURFACE AI,D JIPFCTIEN VERSUS WINo SPEED USAFETAC FROM HOURLY OBSERVATICN' AIR wtatffr SERVICE/HAL STATION NUMPQ: 7 2qh6 STATION NA[: VAN UY S CA L'I[2 OF P[COPD: 79-93, 9-87 M'NTA: APP HOURSILSTI: C2 WIND SPEC) IN UIECTION I - '.-b 7-IC I I-lb ' 7 2A D 1 -u. I R-55 SE 56 TCTAL. MEA N IDUo E.E SI I I WbN S I 9. '.7. 4.I S.7 : N w 7 7* Iw. T * 7 I T0Q 1 T1A Nti'fAP OF OPSFAPV A 7I1DNS:

43 GLOAL CLIMATOLOGY BRANCH PERCENTAGE FLRUNCY OF OCCUPENCE OF SJ FA( sind UIPF CT (,% VERS&uS *14U SP [( USAFETAC FROM HOURLY OBSER ATICNI AIR WEATFER SERVICE/MAC STATION NUMPER: 7228b6 SIAIION 4AME: VAN NUYS CA I 0D Of PECORD: 7P-87 "CNT,: APP HOUSILSII. *hlc'-03c I WIND SPEE) IN KNOTS DIRECTION I -1 ' i ZA O 4p-SN C 66 TTIAL MEAN (DEGREES) I WIN:, , N I J. p 7,I.. ii.p NE I NE-.4 *l.5. FE.(.5 4. f SF ' SE I SE.I S 3.6 l SSW..6.I.4 b.c NA I WSW ?.9 4.I V I V.l WNs.A ? NW S NNW I RARIAKLE I TOTALS I D.0l T ,,... o.,...,....., ,,,,.,, ,..., IOTAL NUMBER OF O9SERVAlIONS: 126 -, * L 6

44 GLOdAL CLIMATOLOGY P 0 6 9CENTAG FPIQU:NCY Of OCCLPRINCL r SJ4FAZI.h'.,l.rf.TTN AvfTu%.1N0 SEFLb USAFETAC FpOq 7 0I)dL Y 3.tSVAFill" AIR WEATIHER SIRIE'EIMAC t STATION NUMPEA: 722AS STATION NAME: VAN NU YCA IL )F 2TL CLQOP3 IP-- WM N rk. A - 3C SOL(SLS! I S-C I C112 I WIND SPE) Il 440T5 DIPTECTION I ,1 Z R Q 4-7 oq-sb GE Sb TTa Ma..o,.... NI , WjI%.... U NNE I NE7 qq. I q 4 b.4 f EVE I.7". 1 l.6 '*.3 I., ,f S 4 l 2. C %sw ' I.4 6E.3 SWA Vs w I1 I I 3.,2, I,J.2.{ % N...4 eli 1l A AL n IIy IA f I1 1 TO TALS I , TOT AL 41,0345 Pr 04F OPF. A T11'' 9-!

45 GLOjiAL CLIMATOLOGY BRANCt USAFETAC AIR WEATHER SCRVLCE/MBC PEqCENTAGE FREQUANCY OF OCCURRENCE OF SUTFACE WINO DIRECTION VERSUS WINO SPEED FROM HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VAN NUYS CA PEIOD OF RECORD: MONTH: APR HOUBS(LSTI: LO... I T WND SPEC) IN KNOTS DIRECTION I li1-lb p? N-NO NI1-N4 NB4-SO GC Sb TO0T AL MEA N IDE GPRES I S t : ;... ;... i...., N NNE,3.R I NE. *2,7 A.S ENE.9..6 E b.! FSE ; 7.7 SE 3,q T I.7 1. SSE S, F SSW 1, SW 1 I.e b. WSW w WNW..8 l NW N4N ,....,...,...,,,,.,...,,,,., ,,,... o...,,o,,..,..., VARIABLE I CAL" l // / /// 9.9 /I/ TOIAL " I.4! TOTAL NUMBER OF OPSERVRTIONS: 900-4

46 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR JEATHER SERVICE/MAC PERCENTAGE FREQU-NCT OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSFRVATION STATION NUMBER: STATION NAME: VAN NUYS CA PEPIOD OF PECORO: MnNTH: APR HOURSILSTI: ISOO-1700 I,IN0 SPEED IN RNOTS OIIECTICN I 1-3 V _ SE 56 TOTAL MEAN IDFGP-ESI I 6 INS N N NNE i.7 FNE.1 1. f V FSE.1 A P.S SE I n.v SSE I r S I S 4.3 SW I I WSW I 1.6 M.D W WNW NW d NNW IS.I TOTALS I 52.p is -4 TOTAL NUMPf P OF OPSERVAIIDNS: R9P

47 GLOBAL CLIMATOLOGY RAND)- PEPCENTAGE FRCOU7NCY OF OCCURP-NCE OF SOYFACE WINI3 UTTELIION VFRSUS WIND SPEED USA FE IAC FROM HOURLY OSSFRTA110', AIR WFATI-ER SERVICE/PAC STIATION NUMBER: 72288!. STAYTION NAME: VAN NUYS CA PELRIODJ OF RECORD: MONTH: AFR HR 9 5 LS33: jrjn-?272 I WINO SPEEl TN KNOTS GIPECTION I I Z N? GE 9,6 TOTAL MEAN IDFGP:ESI I I ATN2j N I * NNEN NE I 0. E NE IA E. A F Q [ SE I D SE R8.9 b. SSE * 7. S I SSW I n q sw 1! usw I W W9 3 1Q Nw NNW j TOTALS I R TOTAL NUMI8EP OF OBSERRAT310N5: 887

48 GLOBAL CLIMAIOLOGY BRANCH USAFEIAc PERCENTAGE FREgU'NCY OF OCCURRENCE OF SURFACE WIND CIPEETION VERSUS WIN FROM HOURLY ORSERVATIONS D SPEED AIR WEAT-ER SERVICE/MAC STATION NUMPEP: STATION NAME: VAN NUTS CA PEqIOD of PECORD: 79-Vt MONTH: APP HOURSiLSTI: i WIND SPEE] IN KNOTS DIRECTION I ? N-NO R-55 GE 56 10AL MEAN (DEGREES) I % WIND... * * o o *...o N I " NNE.I.1.2 i0,o NE f ENE L ESE SE I SS S,6 S SSW I ?.6 q SW WSW I 7 V Q W WNW ' " VARIAPLE i NW.p NNW,. 2.2 I.A.5.1 N CALM / // / // / / ////////// /// / //// q lll TOTALS I. " s t..,..,,.,..,.,,, ,..,* ,, *** ***,......,..., ,,... TOTAL NUMPER OF OBSERVATIONS: 936 -I.4 S,

49 GLOBAL CLIMATOLOGY BRANCP PERCENTAGE FREQUCNCY OF OCCURR NCE OF SURFACE WIN) UIRECTION VERSUS WIN D SPEO USAFETAC FRO!4 HOURLY OBSERVATION', AIR WEATFIER SERVICE/MAC STATION NUMPER: 72Z886 STATION NAME: VAN NUYS CA PE;?10D OF RECORD: 78-qT MP NTH: APR HOUQSILSTI : ALL I WjIND SPEED 14 KNOTS DIRECTION I I b ? N-NO GE 56 T1AL MEAN DE G. E S? I I WIND N ?.0 6.n NNE NE.1.1 9, F NE E FSE,I M Q SE SSE S SSW SW Q 6.I WSW.I w.i T.j WNW A *JINW.5.9 F), NNW I.0 4., I.1 VARIABLEI TOTALS TOTAL NUMPtR OF OPStRVAT13NS: 5391 "--

50 GLOHAL CLIMATOLOGY RAN0 PERCENTAGE FREOU-NCY OF OCCURRENCE OF SURFACE did 0IPECTION VERSUS WIND SPEED USAFEIAC FRO4 HOURLY OBSEQVATTVNC AIR WEATI-ER SERVICE/MAC STATION NUMRER: STATION NAME: VAN NUYS CA PL 30 OF RECORD: 77-R5 MNTH: PAY HOUPSILSTI: ,.,,...,,.o.... oo ,,, o,.., ,., WIND SPEC) TN KNOTS DIRECTION I R-N GE S6 TOTAL MEAN IDE GR:ES I % WIN., o.,....,,o... oi...,. o o....., ,..., N 'J NE NE I FNE. -S 1.0 E R ' E SE.q SE 5.q I S[ ,. S,S S.D A l w SW WSW b3 WN S I T NW q '*NW jo.7 YARIA~TTL I I CALM // /// / / / / TOTALS I.9 5.C R TOTAL NUMHER OF QSFRVATIONS.: 722 Ia, --A

51 GLOBAL CLIMATOLOGY ETRANET- PERCENTAGE FPLQU:SCT OF OCCURR2NCE OF SUIFACE WINO DIR(ClION VERTSUS WINO SPEED USAF ETAC TRO4 HOURLY OBSFRYATION' AIR WEATHER SERVICE/MAC STATION NUMBTER: 72ZR66 STAT ION NAME : VAN NUYS CA PL I0U or REC3RD MONTH: MAY HOLRS(LSTIt J6C0-OaCl I jin0 SPEE) IN KNOTS DIRECTION I 7-3 A ?17 R T-4T NT4-SS GE 56 total ME A N (DE Gp E r %I I IN C, N NNU 3 c7 I37 NE * E NE I I I. [ SE. 3 B A SEL.2 S *2 5' ST It. 5 T WSW I N. I NW I *.6 q9 I. SPNW N TOIA LS 1.M 3 N. I TOTAL NUMPER OF ORSERAWTIONS: RIO

52 (,LOUAL CLIMAICLOGY USAFLTAC AIR WEATF[R SURVIC[/MAC P C IITAG CC PEQU64CY T O OCCURRENCE OF SUIF ACE. 14J 131PFLI ION VLRSUS WIND SPEED 3004 HOURLY ORSERVAVI0' S TA TION 40343CR: 12986, STATION NAME: VA4 NUYS CA E 7 1 OD 0F RECORD: 77-Rh Mn~NTH: MAY HOLRS(LSII : 9-lL I WIND SPELG 14 KN0TS DIRECTION I I 4-b ?-?? GE 56 TOTAL MEAN (01EF S I5 I WlIND N3 NE I N[ I.1 q S.! b I Sr f Sf Q SF3 I p S 1,S b1~ WSW I ?~ 6. 0 I 3 R.7.3 W5 P I N.. I TOTALS.R 45.2? TOTAL NUMPL? TIE OPSITRA tions: 9s0 0d

53 UL0OAL CLI PAT OLO0Ly RR4AN0C PEICENTAG-E FREOU'NCY OF OCCURCNCE OF SU4FACE il'id DIRfCTION VERSUS WIND S?EED U',Af I A CFPOR HOURLY OBSERVATION' AIR WfATI-EP SERH ICE/MAC S TA I '74 UPR, -: T,'Z686 STATITON RARE: VAV NUYS CA pe'100 OF RECORD: 77-R6 MONTH: MAY HOURS(LSI: 12JO-1400 I wtno SPEE)ITN KROTS Ul-LCIIOPA I 1-4 -b R-55 GE Sb TO0T AL MEAN IL)t 5,ErSl I % WIND N I.~ NN NF I E NE I ! F S, A4.I I 2 qt R I a SSE I S A SSW I R P ISA I. WS I..6 9 ~. ASI NW..3.R ".4 NNW I~ TOTALS I ; C TOTAL NUMPER OF OPSIRRATINS: 93C

54 GLOBAL CLIMATOLOGY RPANC- PEOCENTAGE FREQUNCy OF OCCURP-NCE OF SU4FACE 4I'iJ JIAF(TION V[PSUS win D SP--FJ USAFET AC FPO; MOURLY 09SF0VATION" AIR WEAThER SERVICE/MAC STATION NUMPER: 722q86 STATION NAME: VAN NUYS CA PtSIOD UF RECORD: T7-8 MONTH: MAN HOLPSILSII , ,.,,. *....,,., *, I INO SPEC] IN KNOTS DIPLCTION I T l _ be 56 T12T8L MEAN (DE GRES) I 6 1-1[ N NNE I '.2 NC.1.1 ENE -2.2 L ~ S FSE ; 24. ( Q.' SF S 1.7 a *E 90 1 S, q Q.I SSW, SW A.I WSW., ,.., q WNW Nw l 11., NNW, WARI[ARLE I CALM / 1.1 I / l IOTALS I,I Q.5... L F OS.A... P:...,, PUSS:...S ,..,,..,.IC...,, ,...,,,.,...,..,,, TOITAL NUJMq[O OF OPSF PVATI )NS: 93C

55 LO:,AL CLIAfl LOFY F1ANC- P-.RCFNTA5L FREJUENCY OF OCCuRRENCE OF SURFACE W I OI[FCTION VERSUS WIND SP-EU :SAFE I A- FIO4 HOURLY OTS(RVATIO " AIR.F*T.,R S RVICL /MAL 7 TAI1)N No"HL : 772q Ab STATION NAF: VAN NUYS CA PF I0f, F PC 0P: '')NTHi: WAY HURSILSTI: I WIND SPEE3 IN KNOTS L1 CIIcN I -A 4-5 I lb ? l SS GE S6 TOTAL 8'1N ED[ (,P- I s I I % WjNID 'I' I I2.r; "F I '.6 E11..' St 3.E 8.7 o S f ,I 7. ' s5w,p I 3 SW 7.' 1.2,1 -.A 7l sw. S C.5 7.q 4.Q w q.1 7,. N6 W I8 28.I.. I Ii 6* i.1 l NNW.4 ao I~ 4Rlq V,,... *. *,,, , ,... AI TOTALS I jf,. T. T o. 2...,.o U....., , ItOT AL NuMPTI R OF onse PVA lidns: 9 9

56 4 6 L0[L CLIMAIOLOCY PVA tc' ALVCCNTAGCE FVECU-'NCY OF OCCU9RNCE 3F SJ3FAL.IN) DIfLT[,N VFSSUS 41N D SAE L U1AF5141r FPO4 HOUPLY OOcSIVVATI0'4 A IN of AT-fP S'RVICE /MAC S I AI 2 NUMPE : SIAT ON AVF: VAN NUYS CA -2 Iq% SOF RSF32RJ: 71-V5 '?NI-: I-AY HOL9SIL5I : 7I7-3' I wino SPEC) IN KNOTS DIRECTICN I 1-X II A-3! 3-4 '1l-47 4A-5 5 5b 1 1, "AL L N 41F UPEE S I 61 w ';L N I.' ' RN II? 4 1. '. ;. N E I I 4 5l,. S1 ',,, I ? '.5 FSEW 1.I. 2.6, l.a 5. *' I...8.4" ,...., ,, , N W., CVIRI F I 10 1*' A.LS 5.' e ' , ,, ,.....,......,.... TOTAL NUMAf A OF 0nS1 V A T I 's: 6--

57 blobal CLIMATOLOGY RRANC- PE CINTAGE FREQUNCY OF OCCURRENCE OF SURFACE WIN) IRECTION VERSUS wind SPEEU USAFEIAC FRO4 HOURLY OBSFRVATION. AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAMF: VAN NUYS CA P'tIOD OF RLCORD: MONTH: AY HOLRS{LSTI: ALL,. o,,..,,.,,,...,., ,,,...,,,,,,, o..,.,.,.....,...,,,,...,....,...., ,... I WIND SPEE) IN KNOTS DIECTION I ? HI 48-5S GC 56 TOTAL MEAS IDEOUPESI I INZ ,o ,....., ,...., N S R 11o6 NNE NE ENE c L FSE, U 7. 4 SC".1 '.9 7.S I A. SSE.1 3.t , 8.2 S SSW 1.0,5,1 I. 6.4 SW , 6.1 WSW w I , IT WNW I NW NNW VARIABLE CALM l1t//il//i/ '/I//////////// I/fIl/l/hiIll /I/ I/hIII//III/I/IIIIIII/IlIII////l/I/I ICTALS I ,..,...,,..,,,.,..., , ,.,.,.,...,., TOTAL NuMPEP OF ORSIRVATI3NS: L

58 GLOBAL CLIMATOLOGY BRANCH~ PCRCC4NTAGE FREJUrNLY Or OCCURRENCE OF SJ4FAC[.1%J 0I'TION AfPSUS WINU S Lrb UFET AC FR04 HOURLY ORS(PVATl% AIR WEATH~ER SERYICE/ IC STA TION NUMSEP: STATION NAME: VAN NUYS CA P; 101 C, OCORD: US 9INb,: JUN H)LRSIL6I?Jil: I d1no SPEE) IN KN0TS IIPEC TION I GE TA1 MEAN tdc7up- fsi ) I I N 1, N 97*.4 9 NNE NE E NE.9. L F SE A.. SE 3.'... S5F I R S b 6. 6.] 4. SSW.6 4 C. SW WSW.9 91 S.0 NNW TOTALE.?.Pt TOhAL NUMBRFV OF ORSFRVAIIDNS: 1 S

59 GLObAL CLIMAIOLOGY NRANCP PEQCENTAGE FREQUrNCY OF OCCURRENCE OF SURFACE.I4 DIRECTION VERSUS WIND SPEED USAFETIC FROM HOURLY OBSERVATION' AIR WEATHER SERVICE/MAC SIATION NUMPER: 722R66 TITAION NAME: VAN NUYS CA PE'IOD OF RECOPD: 77-8b MONTH: JUN HOURSILSTI: 06CO-09DO.. o. o o.. oo... ooo... oo oo.... o IWIND SPEEI IN KNOTS DIRECTION I ,? N-ND N8-5S GE S6 TOTAL MEAN (GQES I WINL... ;... ; N ,. NNE E 1 '4.6.2 NY q 4.P ESE b S.I I 4.6t SSE R ' S R SSW s I.I WSw. I W WNW.7.7.T Nw II. 1.* 10.0 NNW.1.' S.0 o o o o..o o. # TOTALS I o o , , TOtAL NUMBER OF OPSERPYAI3NS: q99 * omm

60 LO0AL CLIMATOLOY BRANCP PERCENTAGE FREOU'NCY OF OCCURRENCE OF SURFACE.1IJ DIRECTION VERSUS WI SP-i-r{ USAFEIAC FRO)q HOURLY OBSERVATION, AIR 4EATIFER SERYICE/MAC STATION NUMBER: STATION NA4E: VA4 NUTS CA PERIOD OF RECORD: MONTH: JUN HOURSiLSTI: J090-1I1i0 I WIND SPEE) IN KNOTS DIPECTION I A b ? O NI-N GE 56 T01AL MEAN IDEGR-ESI I N WIND N NNE NE.1 ENE.1 '.e.1.3 b2 5.3 L FSE SE.1 9.? 9.6. AN SSE N.N b S SSW SW, S.1 WSW.6.2.q 5.7 w WNw NW N VA RI ARE I CALM liil j/ji'/j////i i///i#/~/ ////U///////II/// Z 9.6 1///// TOTALS I , I TOTAL NUMPER OF OPSERVATI)NS: 900

61 GLObAL CLIMATOLOGY BRANC4 USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURR!NCE OF SUqFACE OIND DIRECTION VERSUS WIND SPEED FROM HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VAN NUYS CA PCO0D of RECORD: MONTH: JUN HOURSILSII: D i elno SPEE) IN DIRECTION I I ! N N P,-55 GE 56 TOTAL MEAN (DEGRZESI I % WIND N NNE NE ENE E 4, " 6.0 ESE SE P,5 SSE N 14 q.r S P.I SSW.8.3 1I. 1 5,9 SW 1.1 WSW.&.1,7 '.3 w Q1 3.4 WNW II I 1 j.rp NW,3 3.ec NNW N RARIARLEI TOTL T T2.S3 Mq TOTAL NUMBER OF OBSERVATIONS: 900

62 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PEqCENTAGE FPEQU-NCY OF OCCURRENCE OF SUOFACE WIND UIRECTION VERSUS WINO SPEED FPOM HOURLY OBSEVATIONS STATION NUMOEP: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 77-R6 MTNTH: jun HOURsILSTI: 1SO0-IT0 I WIND SPEE) IN KNOTS o DIRECTION I T M-4D GE AL MEAN iierp-esa I I WIND N I.1,2.1.T 16.2 NNE I.1..2.O i NE ENE C FSE, mse, SSE S ' p.3! C 0sw SW WSW.i w WNW I T NW..6 1,1.2. I. NNw o.. ~ o, o., o..., o... o o...o ~...o VARIARLEI,, o... TOALS I IO.C 9.0 TOTAL NIJMEP OF OBSERVATIONS: 900 6! i-. m

63 GLOBAL CLIMATOLOGYV RRANC- PERCENTAGE Fr7EQW-NCY OF OCCURRrNCE OF SU4FACE WIND UTPECTION VERSSUS WIND SPEEDJ USASET AC 9904 HOURLY 08SF9AAT1066 AIR WEATI-ER SERVICE/MAC STATION NUMIIEP: 7,28b6 STATION NAME: VAN NUYS CA PL>'T00 Or RECORD: 77-NI, MONTH: JUN HOLAS(LSTI: 19Jn-?JOD DIRECTION I WIND SPEED TN4 ANOTS ,? VS A-5 E 56 TOTAL MEAN (DE Gr E SI I UINV N NNE NE I ENE I I ,. 1V~ 4 ESE I q 7.1 SE SSE I S 1.I 41.. SSW I 7.7 N4R SW s. P. WSW I 6.1 A I S.1 7. WNW R.6, NW NNW I s1.1. TOTALS TOTAL NUMBER OF OPSERVATIDNS: 900-4

64 GLOEAL CLIMATOLOGY 9RANCP PEqCENTAGE FREIIU-NCY Of OCCURR5NCE OF SU:TFACE I[NJ OIPECTIO VERSUS WINO SPEEO USAFETAC FRO HOURLY OBSERVATIONS AIR weatier SERVICE/MAC STATION NUMRER: 7228b6 STATION NAME: VAN NUYS CA PLQIO OF RECORD: 77-Rb MONTH: JLN HOURS(LSTI: I WIND SPEE) IN KNOTS DIRECTION I GE 56 TOTAL MEAN (DUr REESI I % WINE...,......, :.,, ,., N "5 "1.R ,4 NNE [c NE,I.1 13, ENE % L.5 1.S 5.6 * [SE Z" SE I SOT T 5.4 S S.3 SSW, Sw S.1 WSW q WNW I..1 s5 5.0 NW, NNW.j.W 41..,1.q I0.3 RARIARLE I CALM. / 2.D.4 /////I TOTALS I , TOTAL NUMBER OF OBSERVATIONS: 750

65 GLOBAL CLIMATOLOGY BRA N CH PERCENTAGE FREQUCNCY OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIN D SPEED USAFETAC FRO4 HOURLY OBSERVATION' AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAME: VAN NUYS CA PEPIOD OF RECORD: "ONTH: JUN HOURSILSTI: ALL ,,......,,,...,..., I wind SPEE) IN KNOTS DIRECTION I GE S6 TOTAL MEAN IDEGP7ESI I WIND i n... 1;. NNE NE.,C C ENE I, ESE E S..7 B SSF q?.A S SSW.0.A SW S' 3 WSW w, WNW..6 o NW I NNW * VA8IA8LE CAL' / / t 21.l I6 /// TOTALS I,r TOTAL NUMBER OF OPSERVA TINS: 54b -4

66 GLOifAL CL IMATOOGY BRANCH PERCENTAGE FREQueNCY OF OCCURRENCE OF SU-FACE 41-4 UIQECTION AFRSUS ONO SPEED USAFETAC FROM HOURLY OBSERVATION' AIR WEATHER SERVICE/MAC STATION NUMER: 7,2R86 STATION NAME: VAN NUYS CA VPIO, or RECORD: MONTH: JUL HOURS(LSTI: 330C-0503 I wind SPEED IN KNOTS DIRECTION I SS GE 56 TOTAL MEAN IDrpES I I WINO N N.. NNE NF.4.t A ENE L rse.4 5s SE SSE S R ssw SW, WSW I WNW Nw NNW ,.0 YARIABRE TO TA L;.4 jr TOTAL NUMBER OF OBSFRVATI3NS: 229

67 GLOBAL CLIMAIOLOGY BRANCH PERCENTAGE FREQU:NICy OF OCCURR- NCE OF SURFACE WIND DIRECTION VFTTSTS WJIN() SPEED USAFETAC FROM HOURLY OBSERVAT1OJS AIR weati-er SERYICE/MAC STATION NUMPIR: 7,12886 STAT ION NA ME : RAN NUYS CA PI-P107 OF RECORD: MONTH: JUL HOURS(LSI: CO I DIRECTION I i WIND SPEE) 22-??7 TN KNOTS O NT1-Ri OF 56 TOTAL MEAN ldfgoi-rs P I WIND N I 2. 3 S NNEj NT t E NE g E M.D0. ESE S, SE 4 M..T.6 6. S M 3.9 A f, R 1; W I " 6.A WSW 1 i I NW TO TALS I M ,1 TOTAL NumAFIR OF OBSERATI)NS: 9112

68 U LOANE1 CLIMATOLOGY NPAEF PEHECENT AGE ERECQU- ET OF OCCUPRENCE OF SURFACE WIN) DIRECTION VERSUS WIND SPEED USAFET AE PAT HR4OURLY OBSERVATION' AIR WEATHER SERVICE/MAC STATION NUMPER: STATION NAME: VAN NUTS CA VLQ100 of PECORO:. 77-8b MONTH: JUL HOLYSELSYTI 3950-lID) I sino SPEC) TN KNOTS DIREC 71ON I I )? N-N C 4 1-VT GE 56 TOT1A L MEAN IUEGP'ESI I t WIND N I E., N 10r.7n 5. 7 E SE. 14 1p SE I S.N.2 1S SSE S b E, SSI id WSWd *0 4?.6 NW4.4.4 NV n 14N I CAL" I //// l/ //I/////III////////// 2.2 I// TOTALS I 1.2 S V o.0 41 TOTAL NUMPEP) OF TPSFRRATI)NS: R30

69 ULOHAL CLIMATOLOGY BRANCH PE RCENTAGE FRCOUZ.4C, OF OCCURRENCE OF SURFACE 4INLU DTECTOON VERSuS WIND 5 0 E5 USAFE A CFROM HOURLY OR3SERVATITYS AIR WEATHER SERVIEC/MAC STA ION NUMBEC : STATION NANE: VAN NUYS CA PLETIGO OF RECORD: 7 7-Rb MONTH: JUL HOLRStLSTT: I W40 SPEC) IN KNOTS DIRTECTION I j 11-lb a 41I GE 56 TOTAL MEAN; (OF GREF ST )I I NIE NNE c FNE V 5.1 4N CI I N.N S E I Sg N B S I.p A '7 B S 1 2.4, T.2 P.0.Q WSW I R NW I S N.. I Nw I.2.2. TOTALS I ST3.N T1 B.0 TOT AL TINNER YlF ORSERVA lions: 930

70 LLOf AL CLIMATOLOGY 4iA4J- IAFLTA C AIR WEAT[R SFRVICL/MAC PERCENTAGE FPLQUCHE4CY OF OCCURRENCE OF SJ4FA-' gi'l UJIOPCTION VERSJS WIN0 sgrs FRO4 HOURLY OBSERVATIONS STATION NUMP P: 5 R 65 SIATION NAME: vay NUYS CA :1Eo1() OF RECOR : AOSI!H: JUL HOLPSILSTI: 15r-151-: o oo *.o I WIND SPEE) IN K4OTS UINECTION I b I _ T 2A R-5 GE 56 TrAL MEAN 1of SP LES I I t 1N D oo oo.ooo , N I.1.2 0* 7 N NF inc I. I.1, I S I SF I r SSC I q, io.o I, H.? WSW 5. 1 * I.2I 1.(1.* WNW P.6.0 TOTALS I43. 64C (1 D ;i.. ;i ; AOT A L NIME U LPn or O"SERVA 51345: 95n

71 GLOBAL CLIMATOLO6Y BRANCH USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FiEOUENCY OF OCCURRNCE OF SUqFACE W1NJ JIECTIUN vrsjs 11ND S LEO FRO4 HOURLY OBSERVATION' STATION NUMBER: STATION NAME: VAN NUYS CA PERII0 (;F RECORD:?'-A6 M NTH: JUL HOLRSiLSTI: 193-2)UD ~ ~ ~ ~ ~ ~ ~ ~ ~ ~..... ~ oooooo WIND SPEEI IN KNOTS DIRECTION 1 i NJ S5 GE 56 TOTAL M.A N toe GR- ES I %.INil N S NNE.1., C. NE.1.1.2,.C EN.9 E,..N L j ESE SE p 7> SE R S5W.. 1, WSW.2 N.? ? 0.., I, ! 7,1 W I f.0 q.q NW.8.] I r p I.2..,.3 10].? VARIABLE I CREM I i///////i////iii/// //// // I///////// / /I ///////////// /I///I/i //I/ 9.0 i////i TOTALS.6 RI C. TOTAL NUMBER OF OPSERVATIJNS: II I i

72 6106*1 CLIMATOLOGY ARANC- PCiCtNTAGE EPEOJENCY Or OCCURR-NCE DF SUqFACE WINJ DIRECTION VERSUS WIND SPEED usafetac FRO4 HOURLY OASERRATION'S AIR WEATHER SLRRICE/M*E STA ION NUMBER : 7-22*686 STATION NAME : RAN NUYS CA PLRIOO OF RECORD: MnfNH: Jt.L HOLR5ILSTI: 1Z! DIRECTION I i- I N -b WIND SPEED IN KNOTS T 33 N3-4D 41-4N GE 56 TOTAL -f AN IDEGP:ESI a N hl4 N I 1.1.T.. ; NNE I ~.1.4 L * '. 2 4 ESE I ?j.-, SE I s5 It 21.5 SSW IA 4. Iw.1 NN.1 1. TOTALS I ~ ' s. A. 1I' TOTAL NUMI-EP OF 0053F P6V* T I

73 GLO8AL CLIMATOLOGY SINET- PERCENTTAGE FREODENCY OF OCCURRENCE OF SURFACE 14N) DIPECOTON VERSUS WIND SPEED USAFE VAC FROM HOURLY ORSEPVAT1ON AIR FEATI-ER S[RVICE/MAC S TA TION NUMT'E 0 : 7228b6 ST1ATI ION NAME : VAN NUTS CA FE"100 OF AECORO: 77-Rb MONTH: JUL HOUPSTLSTT: ALL I 4160 SPEC) IN KNOTS UIRLCTION I 1-i3 4 -b 7-I T 2R O 4 T GE S6 r CTIAL MEAN N I N. NE I 1.3. s.6 FVNF S S f Sf 1 8i U st S T b. 5W% I S.9 NNW '. 4W IL f I.. TOTA L """IWRTP 0 OPI 1'F TI1.4s: 56"A

74 t1,,al rli-a t :11 4,ANC PE.ENTAGE FREQUE NCY OF OCCURRENCE OF SURFACE.14) DIRECTION VERSUS W1ND SPEED A'lf I A FRO HOURLY OBSERVATIONS A IN R. f - lu 4 tiaii '. U: f NI, SIATICIN NAME: VA% 14UYS CA PERIOD OF RECORD: MONTH: AUG HOERSILST): T00-03 sino SPEC) O4 KNOOS I I -hit 7I 1"R II U GE 56 TO1AL MEAN {I!,(,u S!% WINJ N 4r W I ! g. S.6 i S W WSW I5 2...r SW I.5.9 l.a A~i3 WNW NW.5 5.0o5 NNV I c RARIABLE I T001L I TOTAL NUMBEP OF OPSERVATIONS: 221 -i

75 0 DIObAL CLIMATOLOGY ARANC" PERCENTAGE FREQUE NCY OF OCCURRENCE OF SURFACE WINS DIRECTION VERSUS SIN 0 SPEED USAFETAC FROM HOURLY OASERVATIOS AIR WEATfIER SERVICE/MAC S TATfION NUMBER: 7228A6 STAT ION NAME: VAN NUYS CA PEYTOD OF RECORD: 77-Tb MONTH: ADS VOURSILSTI: WIND SPEC) IN KNOTS DIRECTION I ) GE S6 TOTAL MEAN IDEDrrFi S WIND NE I ENE I C.1 3.,2.1 T.4 4.T, ESE I SE I s. SSET.T 3.1.N 3.7.I S.3 4.p SSW I SW. q.8. I WASW W WNW I NW I NNW I CAL- ///////j//j////////j////////////////////ii// 69.3 t// TOTALS I. 2E l o r 1. TOTAL NUMBER OF OBSERATIONS: 929

76 GLOBAL CLIMATOLOGY BRANCP PERCENTAGE FRLQUENCY OF OCCUR-RENCE OF SURFACE OINJ DIRECTION VERSUS INO SPEED USAFETAC FRO4 HOURLY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBEP STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: AUG HOUgSILSTI: 09UO I dind SPEE] IN KNOTS DIRECTION I 1-T GE 56 total MEAN IDEGPEESI I t 1IND N, N.1. 6.' NNE NE.1,1 P.S ENE..q.1 *g f E I S.S. 5 1q SE n 6. SSE q ,q S3 w,i ", 5.1 SW WSW I WNW',I q.0 NW I N NW 4ARIABL.E TOTALS TOTAL NUMAER OF OSERVAT1ONS: b

77 GLOHAL CLIMATIOLOGY 9RANCI- PEqCENTAGE FREqUeNCY OF OCCURRtNCE OF SU4FACE din DIRECTION VERSUS WIN[ SPEED USAFETAC FROM HOURLY OBSERVATIONS AIR WFAT-ER SERVICE/MAC STATION NUM ER: 722qBS STATION NAME: VAN NUYS CA PEQIOO OF RECORD: MONTH: AUG HOURSILSTI: I O~IND SPEC) IN KN0TS DIRECTION I P N GE 56 TOTAL MEAN 401 SR- SI I W INC I;... 7;..... N N7 Nr fne S r CSE.I A SE S SSE S I p SSW, W SW.53.3 I WSW b.2 w.4.4.i WNW,I O NW I NNW VARIABLE I TOTALS I.3 31.p O TOTAL NUMI E OF OBSERVATINS: 930

78 GLOTAL CLIMATOLOGY BRANCH PERCENTAGE FREQU-NCY OF OCCURRENCE OF SURFACE.IND UJIECTION VERSUS WIND SPEED USAFETAC FPO HOURLY OBSERVATIONS AIR w(ati-er SERVICE/MAC STATION NUMBEP STATION NAME: VAN NUYS CA PE OXO OF RECORD: MONTH: AUG HOU.,S(LSTI I ,...,.,... o ,o...,,,... o..... I wind SPEE) IN KNOTS DIRECTION I 1-3 N-b lb ! GE 5b TOTAL MEAN IOEUPEES) I 1 WIND N NNE.1.T NE FN I t 2.2 N P.5 'SF., ,3 P.6 SI" 1.8l ZN.? '.. 7?N.3 9.s S.S. 7 q, S 1.1?.T ".9 I, sw.8, WW m WW.' ' NW.1.I AAIIMfLE I ,o... o...,...,..,...o...o,. o, ECi"L / //I/ l///i I/I Iilt /1// I//It /Il Ill/ /I f//jt/jl//jii //lj/l//l///l/l ///ll 1.0 IlIl/I HOTL ,..... o o.....,,...,.....o o. o.. o ,,,, o,....,,,o o,. S.t 1O1AL NUMPEP OF OPS[RRA 111N:

79 GLOLAL CLIMATOLOGY BRANCH USAFETAC AIR WEATI.ER SERVICE/MAC PERCENTAGE FREQU-NCY OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FRO" HOURLY OBSERVATION' STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: AUG HOURSILSI : , , o o...,,... o., ,., I WIND SPEE) TN KNOTS DIRECTION I 1-3 N-b D GE 56 TOTAL MEAN IDEGREESI I wind..n NNE NE ENE E b.3 ISE SE P SSE I.1 I i S SW q<.,9.9. S4 I WSW W T. 7. WNW.f, NW, NW, TOTALS I ! b.4 TOTAL NUMBER OF OPSERVATINS: 91E -Ja

80 G102AL CLIMATOLOGY 83264Cr PERCENTAGE FQLOUENSC, OF OCCURRENCE OF SUOZFAC! W1%) PIRE.TIO't VF85)5 w I N S pee D USAFETAC FRO'4 HOURLY OBSERVATION', AIR WEATHE~R SFRVICE/MAC STATION NUMBER: STATION NAME: VAN NUYS CA ) Or RECOPlS: N7H4: aag HOLPS LST4 : J i WIND SPEE) IN KN01S DIRECTION ? SS GE 5,6 1TTA L M.,AS IDECGP: ES I I I wiu N I.3. NNE 1. I. NE.I... 1.NE E E SE I b SE 1 I SSE b.1 S 11.4.N.4. SSWA 1.? SA I WSW W b W.NW I NA I.' '444 I..3.4 A.1 TOTALS I * r TOTAL NUMPEP OF OBSERVATIONS: 7 60r do-

81 GLOBAL CLIMATOLOGY BRANCH PEICENTAGE FREQU-CY Or OCCURR-NCE OF SURFACE WIND DIRFCTIN VERSUS WIND S'EED USAFETAC FROM HOURLY OBSERVAIIONJ AIR WEATHER SERVICE/MAC STATION NUMBEP: STATION NAME: VAN NUYS CA E'IObi OF PICORD: 77-Rb MONTH: AUG HOURSILSTI : ALL I WINO SPEE) IN KNOTS DIRECTION I i Au O 41-N GE 56 TOTAL MEAN (DEGPRES) I WIND.. o.oo,.o~o... o,.,,,,,... o......o N..7 '.. NNE NE o ENE S.I L p ESE, p SE,! ' SS I c 7.9 S , SSw..R sw..? S.i WSW. p w,i. I.! T 7. WNW, R.P NW I0.0 NNW R.6 VARIABLE I TIOTLS I. '6 9 2.P r.r ,,,...,,...,...,,...,,...,,.,,,...,,.,,..o,,...,..,o.,...,... o......,,..,.,... TOTAL NUMBER OF OVSERVTIN : N56g 0o.

82 OLOJAL CLIMATOLOGY ARANC- PERCENTAGE FREQ)UENCY OF OCCURRENCE OF SUVEACE wind DIRECTION USAFET AC FRO4MHOURLY ORSERRATIONR VERSUS WINO S 1 EU AIR WFATF-EP SERVICE/MAC STATION EUMMEP:?22RA5 STATION NAME: VAN NUYS CA PL>3100 Or RECORD: 17-A8t MONTH: SEP NDLRSILSTI: 0!00-D500 I SINS SPEE) IN KNOTS DIRECTION V -V 1 1-T ? 7 R-3D 3R-4J NI-u) VN404-S5 5 G 56 TOTAL PE AN- (OE UR: ES ) I I WINE, N I NNE I* ly.0 NE.r6. 5 b E NF I E I SE 3. 4l 1.5.S S.4 z. SE I.N rC SSE R S S6 I.5.. SA NSA s 2.N4 2. N4.V4 w. P. ANA TOTALS I b I. TOTAL NUM63LR OF OVSCRVA TlVS: 225-4

83 E.IOdAL CLIMATOL06Y 3RANCH PE:IENTAGE FREQU-4CY OF OCCUPRrNCE OF SJ;FA2CE WIN) DIRECTION VERSUS W~IND SPEED USAFET A C FRO9 HOURLY OBSERVATIONS~ AIR weatier SERVICE/MAC STATION NUJMBER: STATION NAME: VAN NUYS CA F'tc IC0O P ECORD: 77-8b "CNTP: SEP NOUR 5 (LSTI: CD WIND SPEC) IN KN0TS DIRECTION It IT 34-4D AV-9s 6E 5b TOTAL MEAN NNE I I NE 1.b.7 5 E'i * E,E S SE r S SSW '.3.7 SI WSW I A WN1. ~ Nw.27I..2. TOTALS I. 2.' E. TOT AL NTMPTP nf OPSUPVA T13NS: 9nJ

84 GLOJAC CLIMATOLOGY PRANC- USAFLTAC AIR WEATHER SFRWICE/MAC PERCENTAGE FPRLOU'NCY OF OCCURR-NCE OF SURFACE WIR!D DIPFCTION VERSUS.INO) SoED FROT HOURLY OBSERVATICN' SIATION NUMPLY: 7229B6 STATION NAME: VAN NUYS CA P LP0V SFf C UPO; 77-P6 MrNTH: 3'-V HOL RS LSTI : Jii -IJ I....,., , , , I WIND SPEEl IN KNOTS DIRECTION I I-i 4-b ? GE I 1 I AI HEA N (DFGREFSI I % WIN; NNE.1.2. h NE I ENF.,. I.., 5.f.3 6., -,, f I.S 1E.? ' SE.1 RR T '.' SOT'.1 5,.C 3.3 * 1 q.6 '>.' S.6.N SW 1* NA WSW, 1..1 I. V.4 - I x.~1 4. WNW.1.1.i. 4.7 NNW ! o , ,.....,, VAPIARLF [I.. 10 T A L S F 4b ,.4 l, to0t7al NIIMt E OF OP S PV A T13 N%: gli

85 GLO6AL CLIMATOLOSY BRANCP PERCENTAGE FRE6U:NCI OF OCCURR7-NCE OF SURFACE 11,9 DIPECTION VERSUS WIN 0 SPEo USAFETAC FROq HOURLY OBSERVATION' AIR WEATFER SERVICE/MAC SIAION NUMBEP: STATION NAME: VAN NUYS CA PPIPOD OF VECORD: 77-9b MrNTHI: SEP HOURS(LSTI: 12UC-14UD WIND SPEE) IN KNOTS DIRLCTION I R GE 56 TOTAL MEAN ICEGR-ES I I WINU 1..,..,.,... o...,...,,...,..,... ~o *....oo.o...o....., N!..2.2!" JNE.4 4 C. NF* 1 4. ENF.4.4 Q t , SF SSC, ? S 6., I SW p 5.2 WSW W.7.1, dn.. 9 A !.w nw.1.2.i.4 9.-"..... o,....,,,,,...,.,,, o...,o,,.... o,,,,,.....,. o....,....,., VAPIABLi Jr I. T o,..,, ,..,,....,,,,...,.,,,....o..o.,, o.. oo......, 4'A ','V U 'VA I13NS 930 9k

86 GLOBAL CLIMATOLOGY BRANCI USAFETAC AIR WEATHER SERVICEIMAC PERCENTAGE FREQU-NCY OF OCCURRENCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSERVATION' STATION NUMBER: STATION NAME: VAN NUNS CA PEQI0D OF PECORD: MONTH: SEP HOURSILSTI: 1500-I7CO w. N P E N K ; ; I WIND SPLE) IN KNOTS DIRECTION I I :? N-ND DE 56 TTTAL MEAN IDEGRZESI I I WIND.o N. N..o... I,3... o..... o..... o...1 I...o..1 oo..., IS.7 NNE NE O ENE L FSE R p.6 SE 5.2 1N SSE ln.4.9 R. S N SSW,A Sw WSW Q W I WNW! NW ,1 2.R 1.4 NSW,..2.7 jl.8 TOTALS I ! P TOTAL NUMBERP OF OBSERVATIONS: 900

87 GLOBAL CLIMATOLOGY 9RAN~t- PERCENTAGE FPEOU:NCY OF OCCURNCE OF SUZFA2E wind DIRECTION VERSUS WIND SPEED USAFET Ac FRO4 HOURLY ORSEQYATTON'S AIR WEATHER SERVICE/MAC STIA TION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 7 7-RN MONTH : SEP HOLRSTLSTI: )03 I WIND SPEE) TN 8'V0TS DIRECTION I 1-3 V ? NO R-55 GE 56 T07AL MEAN I DF G 8 :ES) % WIND6... N NNET I NE I ENE I 6 5' I RR Y F SE I R.f P, SE 5 S. S S SE I f S I R8.. SSW el.s NV. 3.7 *N.14~. WSW.R R b6.6 WNW I f, 9.7 1W I NV IT VARIABLEI TOTALS I C N.?... TOTAL NUMK~tR OF DESFRYAIONS: qio

88 GLOBAL CLIMATOLOGY BRANC- PERCENTAGE FREQU-NCY OF OCCURRENCE OF SURFACE WI4 DIRECTION VERSUS WIND SPEED USAFETAC FRO4 HOURLY OBSERVATiON' AIR WEATI1ER SERVICE/MAC SATION NUMBER: 722R86 STAIION NAME: VAN NUYS CA PLIOD OF RECORD: 17-V5 MONTH: SEP HOURSILSII: *. IN " 5PE. ". N ".NO..... I WIND SPEED IN KNOTS DIRECTION I ?? 28-3D GE 56 TOTAL MEAN IDEGR-ES I A WIN :... ; N I..7 1.R NNE I NE, ENE L to I ESE ' 5.5 SE SSE , S ssw.i 1,3 1.4 N.Y Sw R 4.7 WSW I WNw NW,I p NNW I VARIABVE CALM / l/// TOTALS TOTAL NUMBER OF OPSERVATIONS: 714

89 GLOaAL CLIMATOLOGY B4ANC- PERCENTAGE FREOU74CY OF OCCURNCE OF SURFACE WIND blieltl0n VERSUJS.'14o S 0 rea LISAFEI AC PRO4 HO0URLY OBSERVATIONS AIR..EATH4ER SERVICE/MAC SrTA r104 NUMBER STATION NAME: VAN NL'Y0 CA PEpJ0 OF PECORD: 77-R6 MONTH: SEP 49URS(LSTI : ALL I WIND SPEE) IN KN0TS DIRECTION I I ? GE 56 TOTAL MEAN (DE GR-E SI I % WIND N I.5 1. NNE I NE p.4 E NE S.s E I.1, I E SE I ~ P 6.9S SE I.3, I 10.3?. Ssr 4 G q ~ SSW I SW I 1.A S.4 S W W I. I WNW V.? NW NW I TO TA L 5 ~ TOTAL NUMPEP OF 08SEP88 lions: 5419

90 GLOBAL CLIMATOLOGY 3RANC- PEPCENTAGE FREQUENCY OF OCCURRENCE OF SURFACE WIN DIRECTION VERSUS WIN D SPEED USAFLTAC FRO4 HOURLY OBSERVATIONS AIR WEATFER SERVICE/MAC STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: OCT HOURSfLSTI: o...,...,o...o,,.,.....,...o,,,..,,...o......o.,...o..,..,,.,.,...,,oo.o,**,...,.,,... WIND SPEEi IN KNOTS DIRECTION I -' F-55 GE 56 TOTAL MEAN (OEGREES I % WINS NNE NF. *0 S.D ENE E ESF SF SSE.5.S 7.0 S S. SSW SW WSW.S l.5 4oT US I WNW.0 S.S 2.0 N.M NW NNW VRAWLE I TOTALS I. 1o.T o..,,...,o.,....,,.., o... o,..,.....,... o.,o.. o,.. o......,o TOTAL NUMPEP OF OnSFRVAIIONS: 196.4c_

91 GLOvAL CLIMAITOLOGY BRANF PERCENTAGE FPEQU-NCY OF OCCURRENCE OF SURFACE WINO DIRECTION VERSUS WIN D SPEED USAFETAC FRO4 HOURLY OBSERVATICN' AIR WEAT-FER SERVICE/MAC STATION NUMPER: STATION NAIE: VAN NUYS CA PEPIOD OF PECORO: 77-R6 MONTH: OCT HOURSILSI: D6OP-OR0D WIND SPEE) IN KNOTS DIPECTION I 1-1 A li-i ? N NV-OS GE 56 TOTAL MEAN IDEGRESI I WI ND N,,o,.o,o,. oo,.. o,.,,,,,o.,. o,,.,+oo.,......,.... o o...o ,.... I2.3.,., NNE *; 7.4 NE 4..1 * 5.4 ENE E E SE SE I 5SE,9.9 4q S SSW.S.2.A N.J SW.? WSW w N WNW R9 N...*4.7.V NNW lj.0 TOTALS I j.9. 7.q N.b , 7...,......,...o...o..,, ,, o., ,..,,.... TOTAL NUMBER OF OPSEPVATIJNS: S

92 GLOBAL CLIMATOLOGT BRANCf PCVCENTAGE FREOUENCY OF OCCURRENCE OF SURFACE WIN DIRECTION VERSUS WIN D SPEED USAFETAC FRO4 HOURLY OBSERVATIONS AIR WEAT6ER SERVICE/MAC STATION NUMBER: 72,886 STATION NAME: VAN NUYS CA PERIOD OF RECORD: 77-8b MONTH' OCT HOURS(LSII: 09JO-1I1C... ;...ND' P...*I *... I OIND SPEE) IN KNOTS DILCTION b lb ? O S5 GE 56 TOTAL MEAN IDEGRZES) % I WIND.. N J : :; ;... N I NNE I NE.5.2 qr S.? ENE S.6 I SI FSE S.b SE I b.1 SSE, S.2 b.i 1.2, SSW 1.2,3 1.S 5.8 SW WSW V.8 W I WNW NW I NNW N A VARIABLE I IOTALS I ? lotal NUMPER OF OPSERVAIIONS: 930

93 GLOUAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY OF OCCURRrNCE OF SURFACE WIN] DIRECTION VERSUS WIND SPE USAFEIAC FRO4 HOURLY OBSERVATION 5 AIR WFATI-ER SERVICE/MAC STATION NUMBER: 722R6 STATION NAME: VAN NUYS CA PEpIOo OF RECORD: MONTH: OCT HOURStLSTI: 1,00-1oo... ;... W I N " SP.. *IN " NO. S... WIND SPEE3 IN KNOTS DIRECTION I b ? GE 5b TOTAL MEAN IDEGRPES) I W 1 D... N , :... Z i... N I ; N:f.' NE ENE E. q I.( ESE,8 0.6 V SE.I , SSE I S, SSW.7 1.: SW WSW W WNW.7,7.3, 7.7 NW NNW I IS.1 VVWIAVLE I CALM / / // / // / / / / // / 14 I.1 f///// TOTALS I IV TOTAL NUMBER OF OBSERVATIONS: 4 30 Sk-

94 GLOBAL CLIMATOLOGY BRA1C USAFEIAC AIR WEATHER SERVICE/MAC PERCENTAGE FPEQU-NCY OF OCCURR-NCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VA NUYS CA PERIOD OF RECORD: MONTH: OCT HOURSILSTI: I WIND SPEE) 14 KNOTS DIRECTION N0 41-q7 4R-55 GE 56 TOTAL MEAN IOCGRES I I WINO N ,5 NNE N NE,I ENE E, I ESE SE [ SSE I8.R 9.5 S I A.0 7. SSW SW WSW w WNW N.Y 13.1 NW _, NNW s.5 CALM I~iii/f////////I//p///~////j///////////////I// 3.4 1///f/ TOTALS I ' IO OTAL NUMPER OF ORSERVATIONS: mudi

95 GLOBAL CLIMATOLOGY BRANCI- USAFETAC AIR WEATIER SERVICE/MAC PERCENTAGE FREQUE'NCY OF OCCURRENCE OF SURFACE WIN) DIRECTION VERSUS WIND SPEED FRO4 HOURLY OBSERVATIOS STATION NUMBER: T2ZBB STATION NAME: VAN NUYS CA PEPICD OF RECORD: 77-Rb MONTH: OCT HOURSILSII: IRQT-2J e 0 NO SPEE) TN KNOTS DIRECTION I b , GE 56 TOTAL MEAN tde c -ES I I WIND N S.3 1. NNE NF : ENE c P.A ESE I.S q SE I SSF N.? 5. S SSW,2 2 4,.7 SW S.[ D WSW s.4 * 2 N T 2.M, WNW 1, C 3.q NW D.2 Z.b JD,5 NNW.6 1.R VARIABLE I TOTALS I TOTAL NUMBER OF OSERVATIDNS: o

96 !d GL0AL CLIMATOLOGY BRANCF USAFETAC AIR WEATIER SERWICE/MAC PERCENTAGE FREQUNCY OF OCCURRENCE OF SURFACE J4ID DIRECTION VERSUS WIND SPEED FROM HOURLY OBSERVATT NO STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: 77-R6 MONTH: OCT HOURSILSTI: ZIOO o, ,.,.,...,..,,...,,,.,, ,...,,...,, WIND SPEED IN KNOTS DIRECTION I GE S6 TOTAL MEAN IDEGR-ESI I I WIND N ['.... ;: ;.... : i...?...2;... N I NNE NE ENE q E b or 1.3 R.T 5.3 LSE SE SSE.I I S.5 1.4, SSW SW o WSW w S.j WNW.3 3.C NW NNW p ,4 I_.7 WARIABLE I CITY I //i/i/// I / ///// /////// / I////////,// /III I /II/I/// I// ///II////// //// 41.3 jll/il TOTALS I 2.M 42.8 P.R , '.6, o... o ,..... o...,,......,, ,......,o,...o....,. o... TOTAL NUMBLP OF OISERVA TI3NS : 763 a 'e 6.

97 GLOBAL CLIMATOLOGY 3R8NC - PELCENCAGE FREQU'-Cf of OCCURR-NCE OF SUqFACE WINJ UIRECT[O' VFQSJS 4IN0 S'L, USAf LI AC FRO HOURLY OBSERVATT1O 5 1 AIR WE AIPER SERVICE/MAL STAI1ON N9M2CR: STATION NAME: VAN NUYS CA PRI OD OF RECORD: 77-% MONTH: OCT HOLPS(LSTI : AL I W.]N0 SPEE) IN KNOTS DIRECTION I If I ? nl d ',b TL T AL IOCbG aes I... ) N ' NNE.1. * I NE LSi, 1.10 ISE.1 N f.0 I'. -" f S E. C 4A Sr. 4.2 N. 4.0 SE I 'SW ~1 AS I.1 I.p.1 1 Ws I I ' ", NWI 2.,,.'.0 *JA NNW I.8 1,1 I,.'.1 - TO TALS I TO.? 22.S S ' - T 1 EAL NIJAL Q OF QPSFRVATIJNS: 559

98 14UE " ALTnOIyLO. PA1 CF PL C1NTAG[ rplqucncy Or OCCURRANCL OF SUFACE W':1 JTPECTION VERSUS WINj SP D (Af[IAC FRO? HOURLY OSFR VAT I(I AL 14 t ATFE P L PAV IE 'AC TA III N NU L q: 7 AS5 STATION N$AM[: V AN4 NUYS CA 1f ii CF " ECURD: 7IT-R3,34 WeNT:,: 'OV H)L LPSILSII: :)31,0-35?? ,.o.... o..,..,.,,,....,.,.,., o......, I iino SPES 14 KNOTS I, c I TIC I - - I L-AIL p L) I-4 7 Lq-S5 5E 56 TOTAL '[UN o o.,o o oo,,.,. o,.oo ,, I I.e.4 7 ',' LA.4 %W " w F I 0L.6. ew'..4 s~. I Ni, I1. 7, T4.3Ij I O.F TOTAL NUMPL[Q OF OF P V A T I )N:

99 UNCLASSri HLI

100 Illijio - 25II

101 blo3al CLIMATOLIY BRANCI- PERCENTAGE FRL(U:NCy OF OCCURR-NCE OF SURFACE WIND DIRECTION VERSUS WIND SPEED USAFLI AC AIR slatfer SLRAICL/MIAC FRO4 HOURLY OBSERVATIONS STATION NUMBEP: 726.2ob STATION NAME: VAN NuYS CA PERIOD OF RECORD: 77-SB MONTH: NOV HOURS(LST): I WIND SPEE) IN KNOTS DIRECTION I-3 4-b ,? GE 56 TOTAL MEAN (OF EURESI I WIND N NNF I NF I ENE L (JE I S SSL S SSW Sw.9 * ASW I. 1.6.I I.z WNW NW * NN CAL- I/i///I #///i/ I I /ii// I t//i///idjd//1///,/i///j.//jj/ ,.,... **..,.....,., o.,....,..., /i/......,. TOTALS I i.q TOTAL NUMBER OF ObSERVATI3NS: 835 do--a im ml m l llll m i nl

102 OLObAL CLIMAIOLOUY BRANC - PE3CENrAGE FREQU-NCY OF OCCURR:NCE JF SU4FACE WIND OIREL7I1N VERSUS WIND SPECS USAFEIAC FRO HOURLYf OBSERVATIONS AIR WEATI-ER SERVICL/MAC STATION NUMHER: 7228Ub STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: NOV HOURSILSTI: NO'S...". N... O... I... I WIND SPEED IN KN0TS DIRECTION GE 56 7OTAL MEAN (D U.R- E S I I WIND N NNE NE,..1, 5.8 ENE, I. SE SE.I SSE SSW.2, S WSW w.i WNW NW NNW VARIABLE CALM Ij i Jl If j j // j / //j TOTALS 1 j o...,... TOTAL NUMhER OF O0JSERE8AIINS: 899

103 ULObAL CLIMATOLOY BRArjCF PECENTAGE FREQU CY OF OCCURRENCE OF SURFACE WIND DIRECITION VERSUS WIN0 SPEEED USAFE] AC FRO4 HOURLY OBSERVATIO]NS AIR WEAT-ER SERVICF/PAC STAIIO14 NUMBER: SrAIION NAME: VA NUYS CA PERIOD OF RECORD: 77-9b MONTH: NOV HOURS(LSTI: I dino SPEE) I 4NOS DIRECTION fl lb GE 56 TOTAL MEAN (UER-ESI I % WIND '..."..." , N I NNE NE ENE E ESE b. SE 1 b SSE S SSw SW WSW , W WNW NW NNW, I VARIABLE... A.. o...,.... CALM / / i 18.4 lll TOTALS TOTAL NUMBER OF OBSERVAIINS:

104 GLO AL CLIMATOLOLY 81?AsCt PERCENTAGE FRLQUNCY OF OCCURRENCE OF SURFACE W145 DIRECTION VERSUS WIND SPEED r USAFLTAC FRO4 HOURLY OBSERVATIONS AIl WIATl-ER ERVICE/MAC STATION NUMBER: 7328b6 TA1 ION NAME: VAN NUYS CA PERIOD OF RECORD: T7-Sb MONTH: NOV HOURSILSTI: WIND SPEE) IN KNOTS DIRECTION I I-47 N8-55 GE 56 TOTAL MEAN IDC..RAESI % WIND ;...:.... ;.....:... ;..;... N I NNEY NE ENE, tse b SE N SSE S.2., Y SSW. I Sw I.T WSW I b.n WNW _ hn NNW VARIABLE I CALM I jj/iii///i//iii/ji/ii ii/jjjj/j/i ji i/i iiiii/i//ii/i//iili#//iii I//iI iiiiii ////ii 7.7 il/ll TOTALS I N TOTAL NUMBER OF OPSEAVATIONS: 900

105 (iltjbal CLIMATOLO&8 BRANCV PERCENTAGE FR1.1U.9CY OF OCCURR-NCE Fr SIJRfACE MIND UjI~tCTION VEiRSUS dind SPLED USAFE A C FROl HOU4LY OBSERVATIONS AIR WEATHER SURVICL/MAL STATION NIJMOER: STATILON NAME: VAN. NUTS CA PEq9I U F RECORD: MONTH: NOV HOUQS(LSTI: I hind SPElL) IN AROTS DIRTECTION I ? GE 5b To MEAN IJEGP:ESTI % WIND N. ~ NS NE NE I L.i F R SE I SSE1 I T 5.7 s sswh Sw WSW I I b. WNW 1. b f.i NW NNA VAWIAALE TOTALS I TOTAL NUMBER OF A 11511: 9010

106 (,LVAL (LIMAIL 30 BAA,.h PECENTAGE FR[QU*NCY OF OCCURRENCE Of SU4FV-E dind DIRECTION VERSUS INo 'EE[ USA ITAC FO HOURLY OBSFRVATIONS AIR W[Al-R A[RVICL/MAL STATION NUMPE R : l7.3bb6 SIATION NAME: VAN NUYS CA PERIOD OF REC3RU: 77-A MONTH: NOV HOURS(LSTI: I dind SPEEO IN ANOTS IPECI~uP I ,? SE 56 TOTAL MEAN IO urt[ S) % I WIND......q...e...; ".... I.4. e o P.1 N NI f NE L SE b 6.9 1Sf 1., , I.T SW.7 1.Cr ,1W w NW I NW NSaNW o,, o,...,. o.,,,,..,do~,.,,,.,.,......,,......,... RARIAMLE I CALM l ii//i/iii//d/// I/Ii///i/////iIIIIII//i////i 51.0 /// TOTALS I II, I T O..A L E.AA..3.,,...N.E.M.....Of.....,,.., A....N.,.,.. 10O AL NUMBER Of OCISERVA113NS: 8941

107 GLIbAL CLIMATOLOCY 8RANC PERCENTAGE FRL LJUNCY Of O.CURRNCE IF SURFACE 41NO U IRELIION ERSdS ;IND S? E USAFLIAC FROI HO0URLY D0SF4VATIONS AIR WCATI-ER S[RVICL/MAC STAIION NUMBER: SrAI ION NAlE : VA1N UYS CA PLPIOU OF RECORO: MONTi: NOW HOURSILSI : ALL ,,...,.., , ,... I.OIND 'PEL' IN KNOTS UIRLCITON I ? ? GE 5b 10 AL MEA IDl EU r-s) I t WIND b NNF NE [NE ,.1 L c SE A 6.8 SS[ S SSW SW WSW, WNW N W, NNW *l VARIABLE O... TOTALS I. 24., $ TOfAC NUMPER OC 01,E88RA 11385: 5423

108 GLO.AL CLIMA7OLOLY HAN,.- PE4CENTAGE FPLQU74LY AF 0CCURR7NCE OF SURFACE WIND Ulk[LIb4 ACASUS.IND SPEEDpow USAFEl AC FRO4 HOURLY 09S4VA73831N; AIR E.ATF-Ek SEH81CL/MAC STA TIO NUMPER: STATION NAME; VAN NUYS CA PERIODJ OF RECORD: m0434 :0DC HOURS h.st I: I WAIND SFE1ITN A140TS DIkIFCTION I o I-lIb , 7 " B-55 GE 5b TOT1A L MEAN OE UR-ES I I WIND N S NC ENE fsf.8.3 *H SE I S SSW WSW I WNW NW N NJ TOTALS I TOTAL NUMBER OF OHSLARATIONS: 124

109 GLObAL CLIPATOLOLY bka N~ USAFET AC AIR [LATF-LR SERVICE/MAC PECEN1AGE FPL U UNCT Or OCCURR:NCL JF SU4FACE WIND jlkicion VERSuS 41 NO SPEED-- FRO4 HOURLY OOSFRVATION STATION NUMS-LP: diaiion NAME: VAN NUYS CA PLRIOD OF RECORO: 77-j6 MONTH: DEC HOURS(LST : b&o-oaoo.., , ,.., ,.,.,.... I,jIND SPEEJ IN ANOTS UIRLCIION I 1- A-b 7-j T b-55 GC 56 TOTAL MEAN (foe OIf SI I I WIND N ; ",inf NF ENE, L E I[ b.4 SE.9.4 S.j SC I.S S ? 5. I SW WSW.1 1.5,l W 1.6, WNW , Nw I I.' I NNW VARIABLE I TOIALS T OTAL lins.,. 2..or......,.....,., E..AA TOTAL NUMBER OF UPS kv AT110NS: 822

110 i6 LOIAL CLIMAOLJ(Y d4 A,CH PERENTAGE FRLQUU: NC OF OCCURRINCS EF SUJFAZE WJND UIR[TIO'. VL4SJS WIN, >LD USAFETAC FRO4 HOURLY D3St-RVATIONS AIR WEATHER SCRVICE/PAC STATION NUMCH[: 1-'22c IAIIO. NAME: VA4 NUYS CA PERIOD OF PECORD: I7-d "INI: DEC HOLRS(LSI : 349)-Il S oo o.o ,, , d IND SPEC] IN K-40TS DIRECTIUN I F CE 56 IeTAL MEAN IOL u: E I % w1no N A... NNE I.8 " NE I 2.1. L.D f ne,4.2.6 S.I L a 2 b 4 SF I ' 4 SE SSF I.1..3 I.? 5.4 S, sw I SW,..6.1 I.2 S2 WSW C - I, AWNW Nw 1. I I1.8.NNW R ARIABRE TOT ALS JI TOT AL NUMR[P OF OSW[VA 110%S 93O

111 6LO;3AL CLI M ATOLJGI nanckv P'RCCNTAG[ FPEQUONCy OF OC CURR'ENC Of SU'lFACE ;IND I ktction VERSUS IND SP; EL, USAFEIAC FRO4 14O0UR LY 03 SF 9V AT 10NS AIR blatfer StRICL/MAC STATION NUP-r?: '2z SF AIIOf. NAME; VAN NUYS PE'QIO OF RECORD: 77-8b MONTH: DEC HOLRS(LSTI : I.3N0 SPEE) IN ANOTS bihection I - 4-, I-I0 Il-lb , E Sb TCTAL MEAN 106SR E5 j I wino * o..,....., o N.l 1. T O I3.3 N I vi r.e NE..b LA I.2,. 2.2.I.1 Hi.O 6.1 St I. 4.' J 3.2.1,1 H.? sob.1 4S S s I..4.2 o I , ba II ,2 w ANs F t. NW I N I ? 33.4 J?., , , * AINIARLEI 01ALS l : I T.A.L.... I......TA, T'OTAL NUMVLQ Ok 0 " StR V A T I INS 930

112 ot 10 AL CL KAI fit,,ntag::, NFI 2 FRL CvU ; OF OCCURW fhcc OF SJ4F AE 1 N J U 1 1 f IU N JF90 k".ij 'v, A IR. i A I k w 0,L k [V I M IAI10P No';": I A. I IN NA E; y AN NU.U A PLOOL q i COr P : 77-Su mon T,: DEC H3UP LSTI T I : in'. I -12 I 11- I, '? 2q C 41-7 b-5 be s 6 TOTAL FA % I ' u., Ib ;,' ] [ 6 f,. 5 * I,. 7.. < '.7 2* 0.9.'7 *,,. S,.-+," I.. i t *T " , I 1 L f1,.7k A,.* '., ST-.itJ 3-- T

113 GLOAL CLIMATOLOLY 3NONC PEC3ENTAGE FREQUENCy OF OCCUR8NCL JF SJRFAC 41'43 UIRECTION V[RSS.11, U [U USAFETAC FROI HOURLY OSF3AVTIOVS r AIR WEAT-.ER SLVTN I /MAC STATION NUMBE9: 7?2Abb STAIION NAME. VAN NUYS CA PL4IOC OF RECORD: 77-8 MONTH: DEC HOCASILSTI: 18uO-2) o....oo o. o o, o.,o ooooooooo oo.. o..... o... o WIND SPEC) TN enots.irlct11n I I iC TI-lb : b IC ITAL MEAN I. I1 ; N I "T.? I A NNI [Nf 1.0.1,I1 I SF E l.e SSI I S l 2. 4 S.1 S.I '. I 1.T I.' 6.0 W S. I S.9 WNW 1.? Nw I NNW I TOTALS I 2.1 2H., TOTAL NUMBER OF UOiSERVAIJONS: 930

114 ULUoIAL CLTMATGLOSyI A' 1- PL9nLf TAGL FPEJU-C.y OF OL(CuR I N.L,iF Sull A Ct.1 4J It!LT IN V (4 SS %1N t E, USAF 1 AC FR604 -URLY 0$ H SFRVAT T ' AIR UAIHF R RVICL /MAC STATION NUMPLP: 72ZAA5 STATION NAIE; VAN NuYS CA P E;b? OF RL(ORb: 7 -u0 MINIH: DtC OuVA StI: 21fl-200 I INJ -PEll] 14 KNOTS O1RLCTION I II-b ?7 2a- 1 4-, b-ss LE t, I IAL MLAN ICE (j- f SI I I kino.... NE I N.. E 1..6,. T.. N'-., F,.l oi -9.T I.! tc.? SW C 23. 1T. W WI.6. 1.o I 6.2 G,7..w SN..' i..8.1,1 T.0 t.t V R1 I. A91 N. A j i T.? I T..8 I I I $ ir 1I.S Tf5 TO TALS.U T T r n 4.6 TOTAL f 0 1 k VA IIN %S: 92 % aar* dl-

115 GLOdAL CLIMAIOLO UY,k A'ILk USAFETAC AIR WEATHER SURVLCL/MA( PE0E NTAGE FRLOU-'NCY OF OCCURRENCE OF SU4FACE WIND UIRELTION VERSUS WIND SPEEJ FROI HOU.ALY ORSURVATIONS STATION NUMHLR: S IATION NAME: VA N NUYS CA PCRIDO OF RECORD: MONTH: DEC HOURS(LSTI: ALL. o.o... o.oo o, ~...oo,,.... o, oo,.o o...,....,..,....o.. oo.., I WIND SPEE2 IN KNOTS JIIELC7ION I , O GE 56 TOTAL MEAN I DE 0P- 1S ) I S IN0 N , ' N4.NE NE ENE.0.s L [t SE SSE , S I.P w I 1.7.,9 5.0 S WS. W W W.4 l NW NSW VARIABLE I CALM ///// TOIALS I O0O TOTAL OF 0'ISEAVA lions: 5590

116 GLOdAL CLIMATOLOLY BRANCI- USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FREUeNCY OF OCCURRENCE UF SJRFACE.IN) DIRECTION VERSJS WIND SPEED FRO4 HOURLY OBSERVATIONS STAIION NUMBER: 72',b6 STA1ION NAME. VAN NUYS CA PERIOD OF RECORD: MONTH: ALL HOURSILSTI: ALL...,,,,,,,..,.....,,..,,,...,,,.,,..,...,,,,o,.,..,.,..,,,o,,...,..o......,...,...,,.,...o.,, WIND SPEE3 TV KNOTS OIRLCTION I I -3 4-b 7-10 I-lb ? N GE 5b TOTAL MEAN IDEGREESI I WIND N... ; ;.. 9 ;.... 2'.9. 1:..1~.... 1; *.. 3;'... NNE NE I.).3.1.U.0.S b.9 ENE b 5.4., ESE I SE. 9.0 N, SSE A , b.6 SSW I b.o SW WSW.I I b.5 unw NW.0 s NNW O RARIABLE CALM //////////ij////// //I ////////////j////jj/j //////i 27.////j/// 23.9 /// TOTALS A IOTAL NUMBER OF OBSERVAT13NS 6bO9 L _-_. _...

117 LLUBjAL CLIMATOCLG~y HRAN9CI- PEqCENTAGE FPEIUJENCV OF OCCURR-NCLOF SURFACE 1NU DIRECTION VERlSUS winu 5PEEV in AIR.1A1f-ER l6hvilltiral S TA riof NUMfPEP : 7228bb STATION NAME: VAN NUYS AV PLRLOO Of RECORD MONTH: ALL H0LRS(LSf3: ALL C71LINGS 2)[ FEET %IT LULTIES 112 -ILE OR MORE AND /OR CEILINGS 2,o FELT 0R MORE WI7I- Vl'IILIIAIS 1/, MILLS I WIND SPFt) IN KNOTS DIRECIOEN I-3 9-b "2? 7 2m NO5- GE 5b TOTAL MEAN LIE0.R- CS I x W IND NNE I.4.0 * NI.01.. F NE I p L b. [EI SE s b S I 2 *~0 I3..i SS I S. WSW A Nil NW ' VARIAME TO TALS A TOTAL N:IMVLIP Of Ob653 VA 13715: 09,04

118 paaaapflaaaa R RRRIRRRPR ryttit I IIT ['bodddo ~p AP A AA RR AR T TJL, 00 'p PPPPppp 4 A R.RR PPPrPPF' RRR R R I 1 1) 00 A AAAAAAAA A RkkR R RA R T I -u 00 IV,P A AAAAAAA AA Ri R R TR bu 00 A A A A R R R V 00 PA D 00 A AA RA R TV A- A4 [JLOO..J00 A A kr R R 1T OUD000000

119 SCE ILING VERSUS VIG IBILITY AND SAY CORER SUMMARIES CEILING VIASES VISIPILITY SLMMARY THIS SUMMARY IS A 8 IA A R IATE FREQUENCY DISTR TAUTION BY CLA SSE s OF CE IL ING FROP "0" TI-ROUGH EQLAL TO 0A GREATER THA. 2 L roo FEET AND AS A SEPARATE CLASS "NO CEILING". VERSUS VISIBILITY IN lb CLASSES FROM LEAC THkOlGH EUUAL TO OR GREATER THAN 10 MILES. T}ATA bfrivld FRO HOURLY OBSERVATIONS. FRQLONCY EISTRI"LTIGN PRESENIED BY THE STANDARD 3-HOUR TIME GROUPS BY MONTH, MUNTHLY AND ANNUALLY (ALL YEAAW CUMAINED). NOTES: bfgifgning 1% 1968 METAR SIATIONS REPORTED VISIBILITIES 10 6 MILE' AND GRLATER THAN. MILES. I)-LREFORL THE LOLUMN FOR VISIBILITIES EQUAL TO OR GREATER THAN 10 MILLS APPLAR BLANK. A S A LLE, AIRWAY S STATIUNS NORMALLY REPORT AISIBILTIL TO G MILES AND 7 UR GREATER. HOWEVER 5OML STATIInI REPORT HIGHER VALUES. THEREFORE, THE ID MILE AISIBILITY COLUMN SOMETIMES CONTAIN SMALL PEhCENTAGL VALUES. HOWEVER, THESE VALUES ARE OF LITTLE MEANING AND SHOULD BE UISRLGARDED. FUP MEIAN CIVILIAf STATIUNS REPORTING "CAVOK". ALL CEILINGS ARORL SLUT FLT WERE SUPPESSLD 10 5UlU FTE 1. TI FREFORE, NO PERCENT VALLES APPEAR A OVE 50O0 FEE. SAY COvF SUMMAPY PRESFjIS PFRCINTAGES OF SKY CUVER IN EITHER 1 0 THS OF COVERAGE OR "AIRWAYS CLASSIFICATIONS". OATA SUMMARIZED) JT TFL STANUARD 3-F-OUR TIME GROUPS BY MONTH, MONTHLY ANU ANNUALLY (ALL YEARS COMBIPEDI. ALSO PRESENTED A 6L MEAK SKY COVERS. FUR AIR.AY STATI ONS, TIE CONVERSION FROM IRE AIRWAYS DESIGNATIONS TO ITTS FOR PRESENTATION ARE: LLLAV(./ to SCA T It s, R 31 to brualn -/ID UVERCAST - I/ 10 OHSLLRLU lu/i0

120 GLOBAL CLIMAOLOGl dranc- USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FRCQUENCY OF OCCURRENCE OF CEILING VFRSLS VISIBILITY FROM I-OU4LY OdSERWATIONS STATION NUMBER: 12Z36b STATION NAME: VA9 NUTS CA PERIOD OF RECORD: 78-aI MONF: JAN HOURS(LSTI: CEILING ISI1LIrT IN SAiUTE MILES IN I 6E GE 5E GE GE G- GE G0 GE SE GL GE GE GE GE GE FELT I f, I4 1 3/4 51b /4 0.., o*.... ***.....,* * o*.. *** NO CEIL ' 8b.? U J GE R GF *.P 5 s5.i GE IbOUO 50.A 5b.5 5.b GE 14 0ol b T GE 12C00I b3.7 E b 3.7 GE LIUOLO 53.? 5o-y b.9 62.? GE 9' SA S GE d100 I GE 7'GO b.! b6.9 b6.9 GE bs62, 54.8 t1.3 b b b GE 5O0 ' t g ie f LL b GE 35L ,.6 72.b Z.6 bg Oufli C 79.a GE 2L; I a GE 200n TI. C R.b 6E 10 : d GE 15 0] 60.S 73.4 li. 8c GE 12 1 t, J d b6.3 GE 1E CE 900I t E 800 (,C b GE 7 U L d GE (E!j GE 4: 1 60.' 76.6 b be 3031 bu.5 7b.b d GE 2001 LE b GE IUI C 10.5 '6.b b f ' ' l.0 IOTAL NUMfiER OF OSERVAIIONS: 127

121 40 6LOBAL CLIMATOLOGY 9RANCF USAF CTAC AIR weather GERVICE/MAC PERCENTAGE FR:QUENCY OF OCCJRQEtJCE OF CEILING VERSLS visibility FROM HOU:LY OBSERVATIONS STATION NUMBLY: 7R28AS STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH; JAN HOURSILSTI n CIIGVISIBILIT Y I N STATUTE MILES IN GE GE 5E GE GE Gz GE GE GEL GE GE GE GE GE GL GE FEET IF /N 1 1/ 5/8 1/2 5/ 1 1/ o......,... NO CEIL I 53.5 ' b GE SS.c b GE S GE 16o s U.8 GE f b4.7 GE 12L'01 58.' 1.6 L GE D bf h.7 GE ie 8 0 (0 6?.6 bb.u 6T U.4 6E 10 LT c EG. t.d:j , GE b GE by E 45(OI I GE 1 2u1:) ? GE 35uC T b GE logo GE 25StG i GE d ' b ul 18:0) I B o be 1500) bi.? ? GF 127) ? GE IrUOl d GE 900) d GE 800) b SE b 97.D Z.? oe b60o b k 9' GE SCO GE 4 L9t b v b.6 UA b GE 2U b of , GE TI ,,...,...*...,.....,.,...,.,,...,,...,,...,,....,...,,....,,,......,...,.,.-....,..... TOTAL NUMBER OF OSE8VATIONS: 835

122 61-00A C L I M6II(OL, N4 6N~ P I'", NtI4,1W..14( i 04ID J LCII.0[t4LI OF C(FILL IN Y', V55C vis18i ~T Y usaf El AC F0$ HOM-004 OVStRPA I IJNs AI deat h/ S VI(L/MAL STATION NUL'ML,: /2,.rATION NAME; VAN Nuyt -A Pt'8100 OF RECOPn: ONTh: JAN HOURVS(LST: jj CEILIA( 6G..,..,..., SA M ~ 1 II N STAtU N [ ,....., IN I Gt ul SI V C1 t tt GL I St L G E GL E t, Gf FEET I IR s 4, I't 1 111/ 2 I 1 /4 I 3/ 4 4/ Il, 1 S2/1t 1/4 u NO CEIL S].6 '0.4 5'2 5.] 55.'., I.1 b w6.2 S GE o $7.1 to.: 60.2 p Cl. GE U 3.O ' b bl b f Ib!) U 53.9 'b.9,7.7 S bu.2 b GE 4 O'l $.?5 66. EL G6E 12CJ , 6S bb.8 b9.b 6.8 b Ut IGL?0 f2.' L.I oib4 73' , UE 9-O1J o. J GE 800 n 27 b. 9..b GE 7do I ( N GL 6>3r] 63.1 L.a3 o b (ho GE 4'OO 64.6 ( , uf 43 U : lj GE 3' L,)I L ue 3oUI GE 20J ,5 1 8a d G 2001 ne 69.2 Il.u d ? GE L ul i ] O G p GE Ic[cF, 10:, GE $ ? o GE u5, 3hJ L q GE o? b.6 GE 6ul S b.1 GE 5 I * l GE 42,F p3.4 d3l cl 300 G. 9. G , GE ).1 O3] D ( CE P t 94.b IE E Li 11. N % b ,...o , TOTAL NM/L9E OF 0HEAT37I : 93o AD--I I ~ Il - iil l IIIH

123 6LOaAL CLIMAICLOUY ek6*ih' P(CENI AG I FP -3',9 O o0 5 2I 91P t OF EI LI3. V'6US VI51BIII5 USAF[TAC FROM ih0u4l 3 8Y O.StRwhYIONS AIR.EATEW. V1IE/rAC biation NUMB[ :.'88 t STIAT 1I IaM : VA NL YS CA PERIOD OF RECORD: MONI : J6AN IDURStLSI): DO CEL VS IB IL3Y IN STATUTF MILES Nt G E 6 SE GE G E G E G I k GL G E SE GE GE FEET I IU ' /2 1/4 1 3/4 ;/8 1/2 5/16 1/l o.o NO LEI j d t 6.1 5t I GE.2320) b , E 13DCc u t3.i 61.0 b S GL 16 ) j ( b3. b3.1 b b CE leu b b b b GE 12? 73 5I L b b I.2 u. 1E 7j s 12 s 72.s f t1.. b S ?.5 72.' LE 8,Lfl L ! , ue 7c00m t 3.3 I d.t E 3) C /3.a b , Q GE 62'GC , IE 4' /O ) L I?. 74.b , Cr 4) b b?!. 75.b , Gt 12 P1 67.C , S1 LLO I7.2 : ul 2 I' I 1.I 1*.4 cj a G[ 2[-0) q S L IP bn 7'. H I E. I lu) 71.4 '2. 7 c ul I1, H b 94.6 p GE I L) d S I b.1 GT,o 73.A 3., b GI E cr') , I C 7 3.P.1, p GE t, L0) 73.' "9.2 tt.5 9j.j P ,5 G L u) o7.b If 4Lt b E 31U) "6.3 t3.b u, ) h )fl.lo Id3.0 io U I EuF b Y9.4 IO.3 I I3.3 o G H lo.0 1o TOTAL 61138(6 OF W,%( E3I 8 3 )SS 9130

124 blodal CLINA33LULG '-RAN(. P3U80INTA l RC.U ECY OF OCCCJAE NLEI OF CIILING, VFRS V, OISI6BILIIY USAFETAC FROM HOULY O0SERVATIONS AIR weatdtr 1[IrLMAC STATION NUPREV: 72296b > NAME: VAN NUVS CA PERIOD OF RECORD: 78-8? MONTH: JAN HOURSiLST): 1SUO-1703 CEILING VISIbILIIY IN STATUTF MILES IN I LL GE sc GE CE NE GE G GL GE GE G GE E G E be FEET /4,30 I a II /2 /1 1 / k o o o NO ClL I 47. 'U. 1.1 SI b b (.3 *,E :O000: I6. I I, b b I163U o.? b3.'u bt.0 bt.3 G E Ijtr6 5.5-I.7 ; U t. b. ;.3 (E 1nLOo1 6" t o q. be 12"001 b3.b 65.5 b.7 b.4 7O.o C S?3. U L t ,E 9L.3 6.'.4 b.c b o 3'.o 73.4 EL ba'001 6!.1, a L EL 7'00 E3. F J 4.b b6 buo l II is , SOCOI 66.0L o ,E t, t t.0 )3.0 8U A3.j bo2. '. i 61 4 LI ('.l i B Q ) J V i If31 7.V S o8.4 R.4 8H.4 b O E E' , M5.5 8A GE lugoi 7.-7 SS GE 180I u Q4.1 I b1 i 1 1;l ' F 12C P5.7 t b ot t b.i b t b.2 9b.? b.2 L L ',,, I P 5. 7 t , b.9 qb b ue bil l b CS 7 il 77.' b.4 cf 6 { L! hi.b V A.q f,,) 77. 4_0 h90 d b y.6 L 4,3 77.'.. q b ut '7ll 77.! A 06. 6, 4s b I i.3 15l uf 2.0I 13.0 ht Ic.J I32L; 1E r 6.3 n (0rJ 16I 3., IJ I D.3 t 'I 1 1. c, ' a I l3.3 L.0 10u S F o...o..... TOTAL NUMFIF r? OF L; QS[ C~ R W A I0%S 930

125 OALLIMAIOL,y h t, 0' PE.4CNTAGE F2R-QU3I.y OF OCLJRENC[ Of CIILTSS VfRSUS VIS8IbLLTY L SAI FI A FROM HOURLY OL8V A I 3NS A1 I.R8t ATER,76V10(/980 TA3I10N NM9EP; 7'28,5 STAIO NAME. VAN NUYS CA PEPLOU 4F PLCOPO: MONTH: JAN HOu R(L5S CO.... o oo..... o... oo,.o , CLL [IS VISI8ILIfT IN 5TATJE MILES IN I CL CL It GE GE u G E G GL SE C L GL 3 L L FELT! 1' / /5 5/ /t LEI... L S *.'"a L. 5'... itt ' j o S " qs,o... y2... G[ 1 SH.7, t 1.., i.3., 64E3 '1 6b ,7 6, S ui ' 1. is , f 14 : I :. " ?. 1 E 1,24.S F : U[ 1Cnd0I 6E.4 11.t 14.! S , L IL 6, S ;.) 5! 8L 1 66.o S ) Q I 6. 8 ' i t O I 7.. ] I, 7s.q 7.2 7/ ' 16 ' 2 4.)', , 7' 47 II.) 6.3 P b, a.5 92,t S. 1 11, Si 79. ~ ~ Z I ~ ~ ? '- C7 2.I. -1.0, S., [ '2) 7,6l.' ' "'7 P-UT! 1.9 s. 6 :I3, ? " I [ 76.a "6.u ' 95. : :t.i ! ! Ss.I 4 12:I ! ls! 11.! :l ' I(; , s, " 97.1L I '7.u ,, b f 7 H P p (o! 77.1 ' y 9, ! 17,1-7.s.3.3 C) b b o s j, *.F !1 1 ' 84.3 q b * ' I I A. 3 1, ( 71 I 7.6 j [] U.s I ' i0 9,O 00, :1 l : j 8 a 9 8 8I9 99

126 GLObAL [cimal(ctulvt A F A. Cl Pf/NOTEAS F P4QUE4 V 0 F 0 0O Cf IL I Vf HS VISIBILITY usafetac FROM P-OULLY Va7IONS AIR LAT IiE SlPvlICtI/AC SIA ILON NJHiL-: I-e-b 'IAI % 946: 4AN NUYS CA PFPIOb F RLCOAD; 70-d7 MONTH: JA N HOURSIL7T1: 2 1 j-210c IN I,2 i uc E C, 6E C7 GL 60 SE 5E c GL 36 E7 GL LE L77 I T I 2, 112 hi. I TI. 3/4 1/2 5/It /4 0 NO L I L '..'I t u 63., t3.7 f3.7 b t b3.7 uf] 57 '1. ' 17.t G, ,, I SF I 7.2 6'.u L f.1. 1 t b1.0 b.3 s7,3.7 j 6.0 ul. IIJC")I 27.2.:. n', U b.0 6l' GE ti' 1. 1/ 9' U t, t j C 12 c1 63. t. l E T ; 75 S CI- " ;...~~ , 15t c.G 7b CF ''I c' ls. P u '.e V U7 f I , ) :U, ti 6 1.I~ t,.7 1b , I f, zi , ' , b ; ,7. 78, 3 b Iul ' Ic C ~ 1, b~ 2.~ S 1.,. ' , (.7 'ii. 6 I1,97 71 '1.4 :7, 47. ; ,I ' all.! ,j 44.,1 7b Z:, l~ l,.2, p 2, Z,1 7 p r I 7 c',, , ii 7i <,.; P L c0 '1.. c l "'- 7ZL "7l.1 il , ,9 cl 1',' 67.4, s., ,7 99 Q e,. 7 I 71,'17.6 ",' ~ '' s Fbe 22 ' s1 9, I 'L: , E ' 93.9 Z.4.'.1 97., b SE ' I.. ' 'J1. b , ,1 t Ic I 2: 47.'. '., f G b , A 9S 46 of ~ ~ ~ ~ ~ a a9

127 LUJOAL CLIMATOLOGY 8RAC PEkLN71A 5E F k L-.JNCY OF GCCU6PLNCE OF CEILING RVSLS VIS1axLITY USAFET AC FROM -OULY OdSERVATIONS AIR WFA1H[R S-RVICL/MAC STATION NUM1ERC: AI ION NAME; VlA NUTS CA P -IOL OF RLCORD: MONTH: JAN roursilsti ALL CE IL! 6 IS IH IL IT Y IN STATUTE MILLS IN I U6 l F GE GE G GL G - GL 5L Gi G E GE GE GE f E FLCI I /2 2 11/2 1 1/4 1 7/4 5 / 1/2 5/16 1 / 0),,.,, * ,.., NO CLIL I 51.6 t.b 55.b 56.: $ (, RO., ' b b3.4 b3.5 GE p 59., , T3.4 i.5 Gf 165o 1 55.p T.0 (GO. 6T t1.j GEI 14r-0lo us bb T , 69.4 GE J.5 6:. 0.? D be IaU d.1 6A T I GE f f, GE C 0I b GE Z T LE v ,E 5O S j GE B b.6 be GE b G E 3nOq l ;.b d u 2, JO ( GE 22; b GC : b GE 1, b GE 121, da.1 88.a GE 1o@') GE o b.1 89.b Q5.' GE p ng b o.4 GE 7ool 73.I E4.(L GE [1 t GE 5&CI GE I A q E T G E,2UP j I b G +E Itoh 10 "T ue Q , ,......, ''...'*. TOTAL NUMPL8 OF ORSFRVAIINS: 5600

128 GLObAL CLIMAIOLGY f40ncr PEhCENVAGf FR- U-EY Of OCCJHP:N3t O F (FILING Vg[gLO visibilily USAFET AC AIR w father SfRVIC,/MJC FROM HOU4LI O9CPVOTTON S STATION NUMPER: 7225b6 5A3ION NAME; VAN NUYS 2A PEPiGO OF RLCORD 7b-61 MONTH: FEb HOUSiLST : CEILING AISI ILI V IN STAIUT E MILES It. L t E JE GE GE GE GE G GE GE GL GL SE L C GL E FLT I /2 1 1/4 1 1/4 5/8 1/2 lb 3/ , * , , NO LEIL Cj o ; Z 3.2 b GE 203U b b b GE Ia CU b , ,E It0oI b od b b6.b b6 64.b GE 1W b.6 tl b b.4 GE 12P ,.t t bb.4. b b6.4 66, b.4 GE 1GOD c j U9.3 o9.0 ue 9o0of 53.1 S b9.2p y o u.e nioi 3.1 'o.4.o.d b9.d o GE S j b b9.0 4, J 9o.a 69.3 u C 5.? L! b y GE 501n , S t GE 45CC c u E 42C0 5.6 (7 b E 35C L G.? u t b.1 GE 1721J o L 79.t ,.6 GE s.C L b E 2 CU b u E P GE F9.4 a E u.1 6b GE 12P0! d q E 9 l(r 62.p 77.4 o9.d t S GE 8o0I L 2P 71.9 os V4.7 q GE 7UG GE h 8B t b b GE on GE o,.h i6., Q GE ' P 7s I GE 2GOI b J 10.0 GE i.6 b O.O IRO c0.0 G E d y9.! ) C T01AL NEMBER Of OISERVA I1NS11: 113 a-

129 GLObAL CL3MATOLOLY branch PERCENTAGE FR-QUENCY OF OCEJRRENCE OF CE3LING VEtsuS VISIBILITY USAFETAC FROM HOUILY OBSERVATIONS AIR WEAT.ER SERYICELMAC SIAI1ON NUMBER: 722d06 51ATION NAME: VA N NUYS CA PERIOD OF RECORD: MONT-: FEB HOURSILSTI: 0600-OA87 CEILINGRIIIIYISTTTRLE IN f, L L SE GE GE GE GE GE GL GE GL GL GE GE GE GE FEET In /2 1 1/4 1 3/4 5/A 112 5/16 1/ ,,,,.,..... o.,,...,., o ,,.....,...o..,.,... NO CEDL , GA GE 20DO GE S5.C 5i ti be A bi GE b GE D G 102C A 64.o A.A be 9UO b R R GE 8 Con be 7CO I It 6C0O R GE A UL 45O0 b , U 61.R tb Z ' 70.' GE 3' L ] GE 30C ' ( LI ut 20C0 ts d R SF 16C5l L ] CE U d RS ut 1Cd ] E ' d Ut , ' S Ut : t t ut f On b6. 71 T.b 61.6 ' ' b E 4 o4t H Z S t c do IE b te F O o ' b.9 (t [ 4 bb d , ' L..*.. O.. F 5... T..., ,..,... *.. *. * ,......,...,... *......: TOTAL NUMIHEQ Of URSERVA T 3)'J is 3

130 I GLOBAL 16 CLIMAIOLOUU canch PERCENTAoE frquency OF OCCJRRENCE OF CEILING VERSUS VISIBILITY usafetac AIR weather SfRYlCE/MAC FROM houly OBSERVATIONS STATION NUMER: STAT'ON NAME: VAN NLYS CA PERIOD OF RECORO: MONTI-: FEB HOURS(LSTI: CEILING 8ISIB1LT IN SIAIIJIE MILES IN I GE E i[ GE GE SC GE GE GE GE GL GE GE GE GE GE FEET /2 11/4 1 3/4 i/8 12 5/ ,...,...., ,, ,..,.,...., ,, ,,,,, NO CEIL I b GE 200o1o GE sr.5 9 R.A LE RC be j bs GE I 2UOI ? b GE IOL b A E s UE 80D) b b GE , j GE 6000) Q GE SC00 5P GE 4 00 b 9.? s GE 40CO GE 35(il b G1E scsi 62., o GE 25uc d GE GE 19U GE 150n ] B GE b 0 I6 I.u 8I I IE lo , GE 9C GE 800) ? d u.c 700) GE I.E GE 4C al u ie 2jO ue IdOl S Od q GE n) O TOTAL NUMBER OF OBSE3VAII)N5: 846 IL

131 =V GLOBAL CLIMATOLOGY BkANCF PERCENTAGE FREQUCNCY OF GCC'JliENCL OF CEILING VERSUS VISIBILITY usafetac FROM HOUiLY OBSERVAT13NS AIR WEAT-ER SERVICE/MAC STATION NUMBER: 7228b6 STATION NAME: VAN NUYS CA PEPIOD OF RECORD: MONTH: FEB HOURSILSTI: 12o0-140O CEILING VISIRILITY IN SIALJTF MILES IN I GE GE 5E GE GE GE GI GE GE GE G G[C GE GE GE pe FEET S 21f2 2 1 L/2 1 1/4 L /,4 S8 l? S1lb 1/4 0 NO CEIL b C b S b GE b b G t bl GE b GE lreoi bp GE 12,0a ' 6b GE 1OUr G GE 90U ,6.b T , T0.4 ue ( ue TO GE b 7G LE s 66.b te *5 67.U GE GE 35 uf GE GE s A GE 2V C b GE C fe L GE , GE GE d7.j GE 701 T h GE t6l o GE GE 4UO 77.L P Q be 1in (E 2 IJ a ( oe lo b GE So 77, d IO , TOTAL NUMBER OF CBSE688 lidns : 846

132 4014 6LOtAL CLIMAIOLOY HRANCH PEOCENTAG[ F8CwUENCY OF OCCJRQLNLL OF CEILING VERSUS VI1S16LITY LSAFET AC FROM OU'LY OdSERVATIONS AIR 6EATIER SERVICL/MAC STATION NUMLR; 72/8b STA7110 NAME; VAN NUYS CA PERIOU OF RECORD: MONTH: FEb HOURSILSTI: 1 5 O CEILING 81518l1T IN STATUTE.ILES IN I (,E GE le OF GE 63 GE GO GE GE El GE A0 GE GE GE FELl / /4 5/8 1/2 '/16 1/4 0...,...,, ,,,,...,...,,,,*......,....,...,...,...,,...,,,....,., NO CEIL J.l D GE , uc b b2.3 6E lb ,L 5,.? GE 14CG0 I ? 66.7 GE 1/cOoG b GE " t b GE ( Z, GE 8C001 I.5 C6.2 b.[ c.8 GE b G E n , b GE 5!0OI 63.0 ta.l 3g GE 4, ue 4CD I b.1 71., GE F.9 74.b a GE 3OOGO S a d d GE GE 2l GO I ; H GE 15OG bs GE 12UD GE P 5.2 i 7.S GE gi T a te , GE Rt. 2 d r GE , , GE 5O b.b GE t GE d ) IO E d? IC Gf o.0 n GE r , lo0.o TOTAL NUMBER OF OSEkVAT13N5. 846

133 GLOBAL CLIIAIOLOUY BkAN PEkCENTASE F6 QUENCy O F OCCUPRLNCE OF CEILING VERSUS VISIBILITY UAFErAC FROM OU9LLy OBSERVATIONS AIR 4FAIHE6 SERVICL/MIC STATION NUMBLR: 726tb liaion NAME: VAN NUYS CA PELOG OF PECORD: MONT-: FEb OUR5(LSTI: IB0-23p3 C IL I ISI ILIIV IN STATUTE MILES IN I GE LE 3E SE GE G GE Gr GE GE GL ue GL E L Li FEET I 10 E S /2 11/4 1 1/4 5/8 It? S/I1 1/4.. * * **.,,., *.* , N0 CEIL ,.S3 1S "a.3 5b S8.b SV. b,b. b 98.b. UE j b6. U 6.0 b bb.3 66.D tb.j L. GE bb.0 6b , bb.3 bt.u GE 16[' L.j b b6.2 6 b b u t u b GE 120jo 63.1 f8., G ! GE a te GE 80U , , J s.? 7.? 761 GE b S GE 600O ' q I.4 LE ,.4 7J.8 7? b.b t b.b t. G F V , 1 7b.7 be 4U , GE a.? PI. h CE 3U d z d Vs.? H5.2 El ule 2'd H b , 87.2 GE n , GE G J.1 OE b UE P I UE I A GE "C e9.l s GE GE b b Z I I GE se b r I Pu.0 I GE H O.0) 1O I00.0 GE 11tin P I GE qi [n. I O7AL NUMBER Of UBSERVA T3NS: 846,Jt,_

134 'a"' ULoAL CLMAICL0OY BWAN(H P3i CFIJTA5,[ fg>.,jenc Of..CLJ69162 of C IILINL& VF8SuS VISIBILITYr L SAF-E AC I F WOM GL'ILY Gd L PV ATTONS AIR W'ATCR SEwVIC /MAC S1A1IO NUMVL: 72Z8b STAT[ ON N! : VAN NUYS CA P(P[03O OF P.COPO: MONTH: Fib HOURS(LSTI CEILING I BILJITY IN CHIuT! ILLS, It. I (,E GF SE GF CF G CE 62 GF E GL G[ GE EF GE GE FELl 1 6 r H /4 1 3/4 S/8 1/12 C '21 1/4 0.. " '* ' *.'' NJ CCIL I G W J.,3,. 3 s S C5.7 Cl. b, bo. Z , s?:1,2.3,2: ,[oL 1S 3 3j i.7 t7.b 53./ S, ] u?.i 62.3 Ut 16L t L1.Ib b b , *L 62.3 LE C Ol b ,,.7 8.7, b.3 It IZr T, u b.5 69.C S 9., ' 9.S 69.b.1 lcju 1 t" 61 6, I.t T 9QI 61.' t,u u ls ? Z ul 8 % , s A I 'A b..l uil ti d S b T ].b ul,flj 611t.3!.. ul.? / t WL,., 1 1'.4 3f.p 7, E Hf oil,. 3&.t R " I% 1 t , A 1 31., 33. ol.] d 85.2 d B Ut,' o6l 7.b I.. 3!.c 95, , / 1 ; 4 b 7,, I 9l , , 92, 42. 6L IR r [ r., h.. :3., u t lo 7',. o, U II ' UF Dl A 9.I , ' l 3 5., A! 730I 35.6 t., u 1 6 I d H4.j bue '1, d qs.i s uf Pt ' U[ l i.0 IOn. IU.0 1o D.D I 3".8I 7 2 g o IOo.U Ut 1:1( bi q o IU00.D LE ) 35.p 4b b TOTAL NUMB R OF 0,S 8kVT13NS: 946

135 GLOBAL CLIMAfOLOy BRAND- USAFETAC AIR weather SERVICE/MAC PERCENTAGE FR7QUENcY OF OCCJRPENCE OF CEILING 9'RSLS VISIBILITY FROM HOUtLY OSERVATIONS STATION NUMBER: STATION NAME: VA 4 NUYS CA PE1IOU CF RECOPO: Mr- 4 TH: FF, HOURSILSTI: 2 0c-2303 CEILING 9I181BL139 TN SIATUTE MiLES IN I GL GE 3E GE GE G- GE GE GE GE G 1,4 3 E GE GE Gf FELT I GO 6 5 ' 4 2 1t2 1 1/2 1 1/4 1 '/4 5/8 1 / r/il 1/4 u NO CEIL ' b ' ,.3 t2.3 GE A ,c I GE 18000c 5A., , ,7 UE lbl:01l ? F GE 14 ru) ' J 73.j GE 12P ' q 73.4 GE C S 74.', b 7N E b Gr 8"0 62.Q GE 7ra , GE b G E 5U S l I8t 7 6E Z.8 75.q 77.b * GE 431Gn GE 3100ol a.4 6q9.4 G E 000 6q ( 37.2 A2.5 8'.b A j.7 GE A A ,.4 AS. be 2P001 b4.r b.6 GE ! g A j ! CE C.6 GE 1, q , q, ? GE ,., E LU q3.2 9! q3. 9' GE A Q GE b S s. GF 6UO b qb b. G E U GF 4LCr P4.9 9.,9 Qq GE ! q9.8 9g Q GF ID O.0 be l GF r , 97.1D ,.,..,,...,.,,,,,....,..,...,,.....,.,,.,,..,,...,..,, ,.,,.,.,..,.,.,,,,,,...,.,,.. TOTAL NL'MBER OF ORSF8VATI3N: 827

136 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEAT HER SERVICE/MAC PEHCLNTAGE FREQUENCY Or OCCURRENCE OF CEILIN', V R9US AISIR1LITy FROM HOURLY OBSERVATIONS STATION NLMRLT: STATION NAME: VAN NLYS CA IEpIO Of 7E CORD: TV7-R m 7N1I: FEF -3L951L9I: ALL CEILING VISIRILITY IN SYATUTE MILES, i I GE L I,[ G E G G E G GE GE le,e ie ALE FELT I nf /N 1 /" /8 1/2 9/16 1/4 U,......,....., ,.,, ,....,...,... NO CElL S ' ! ,' 47.3 be LOUCO Y ' (if S !." Q , GE 160C , I, by E 14 O r (3.1 65,. 65. b 6, q ' A GEf A N btt ) uf I I ' ue T , b 716 1j GF C, '.' GE 7) T T ',' GE T GE ? , I E TV S ,.3 7S.I be NrOOI b GE n ' G6E all. ' R2.S 9 UE 2, P P4.9 8Q I.E I t? p8.2 8.A GE 1907i b , n.1 ' '8.7 GF I5109I 7o s O D.1 GE ,5 9' ,.6 SE lv00l 7C B '3.6 SF 92o ,, s GE MDIII , , be P Pl K Q b.I 6GE 60l , , B GE A Q8. BE 4CO P, GIE 30] _ P P '9.5 9q.6 99, o or tonl QQ.L G , Q I CO.0....,..., I ,, ,,., S T OTAL NU MeEP OF 08SEPV8 IIN: N 577

137 GLOBAL CLIMATOLOGY 88ANH PE6CENTAGL fr QUENCY OF OCCJRCENLC OF CFIt I l VF"'US VI'I ILITY USAFET AC FROM H031LY OSEPVATI045 AIR weather SEVICL/MAC STTION NUM0P: STATION NAME: VAN NLYS CA v I23 U "[COD: PETS: MAP I-OUPS(L"1): D CEILING VIS11LITY IN STATUTE I IL IN I G[ E E SC GI GE GO GE GE GE GE 4 GE SC SC E SE r re T IF, /4 1 '/1 8 1/2 % 15 1/ 0, , , ,, N 0 CEI 48.4! S4.) S S4 A o 54.H GE 26CO p a N GE 18C ' S b E 54.3 q.8 54.q, GC 160O1 48R S p c P ' q.8 LE S6. 6." t,.5 GE 12G % a s s GE I 0l se l.i C GL ool 50.R bl GE 620) GE FS0 ) be b CE :4, GE 3r J GE 3700 ' ' 7' R ue f 2300) Sq R ff 100) '4.7 GE 150) qi q I SF I1?u ' ?.5 3 [ IrO) " z ps S.z (F on) ) b G P F '4.2 GE ? g4.z bt sob DD.0 10P.0 I :.0 E 400) 61.3 p6.! P On0. loc.c fe ' q 9q jp0.0 Io f GE 200) 61.3 ' P o GE ? 10o.0 10". 1c O.G GE c n 61.3 I I" ' I ICO O ToTAL NUME 0 OF O48 EPVA113: 124 S6

138 LOBAL CLIMATOLOG BO GANCH PERCENIAGE FR-0UENCY OF OCCJRRENCE OF CEILING VF850, VISIBILITY USAFT AC FROM OUrLy OBSERVA7IONS AIR weatfep SERAICE/9AC STATION NUMPER: 7228R6 STATION NAME: VAN NUYS CA ERIO0 or lecopr: ipiontf: m5 A 3 5TURSILZTl 36U-35[f EILI" G VISIRILITY IN STATUTE MILES IN I GE 5F So GE GE G GE GE GE GE,L 51 SE GE F L SE FEEI I ( /4 1 1/4 SIR 1/2 1/16 1/4 - NO CEIL I "." 5, su.9 GE 200E00 4P b ' L. io8n I S S6.2 ' , S 5..6 A b GE lc s s ' , 6 GE 140OtI g..I , ; q "." GE S R,- 1001) U.1) 06.; , ' , 6,6 b 6.5 GE A b f , GE 8R105 S s , 62.7, a B 6. s?.9 UT 7'f)0J s 2.2, ' t.p 02.p b , (,., 2. '.- G E 62i I b " , ? E. (.," ' A 6202;1 5T.2 67, i f ,f E ' b'.0 67.C 67.' J GE C C (, E'.9 u f 31 UrI 56.? ' ( t, coS 99. 1, I ' ,, ?.; 5I 2' ) I ' 9." O T, LE 202nI (0(." ( A0.5 B P.9 su.b GSE I1on2I 60. r AR I, 1s H s S.2 A ,1 95, b (E 12in ? ?1 R ' I RQ.T gq R 49.5 IE I'; Io 1 6? I' 90o , q2.4 q GE s GT 7o0 6, I 56b q 5.3 6( l GF 50) F r q G.E lull R T.1 0#9. 9'.4 9B.4 9A ' GE GE ICOI so p8.4 gp Q9.5 1A , T....,,.....,,... **.,,,:3.....,...,,,... *,.,,,...,,,,,... TOTL NUMRE[P DF Oq5S RV A 7 1 Z 141 : 4

139 GLOBAL CLIMATnLOGY 348ANC "ERCLN4TS[ FR>UENCY OF OCCJRENCE OF CEILISS V1RS145 VIslILITY LSAFETAC FROM HOU:1 018SERVAIONS AI! WEATIEP SFRVICE/M4AC STATION NUMER: STATION NAME: VAN NUYS CA E 1OF OF PE CORO: "61343: 1Ar HOUPSILSI: U '-1 I" CEILI G V415IPIL 14 STATUTE MILE' IN I GL SF SE GE GE GE GE '5 3E SF. 3 >1 FEEI I I i 1/2 1 1/4 3 '/' 5,6 / F/3', /' / , ,..., , NO EIIL " S ' K, GE 4C0000? '.. I I 5. GE I be 160flO z I. 5. I GE r3u " )S. 3 'S $ R P '.., GE 121, ' $5.1 $1P '4 59 U E 150OO L; ; '..I ). GE 9nr0I 4 F -P.1; 55.? 1 $ b6.r ( ' GE 8G!0o 41.(0 $ , b 61.0 b 1.1 b3.1 AII I. II 3 3 GE r $ (;.A ' I I. I. 1,. F , LI. I I I.z I GE b '. G E 4 E01 ri 4P ' 62, b3.2? f I.3' 4 C00 41.'9 ' , ,4.1 3.t ' 1 tf 35 I 51.? I b '. '?.I t F 300G ? :.', 1.7. ', F 2,sI 5'. t ; T." ' L El 1.? A q F '4.4 '4. SF l4:-? 631' q.2 8D.5 8.' A '.? P ;, '6. 3 b6p R.8 P q 1143 '6. R -j bf 120 j ?.? A5.8 A ' 91.5 "1.5 '..5 3.' GE 31 n LF: u ' I3.3 '' '.! 4.3 L( F 0qo16" J 92. ' ' y ' SE 4{71 62.l y 7. I 17., ,. j , 100O $ 83.o ,.R Q7.? G F60un 6;.7 5. S. 9.J " *4 9s 'b SF 5G FJ ') I? q.3 G E 3U , I q O? r? ?.9 1!". n I1) 3.3 T, ". I L E F '",.]! I P,. 1' ). " 3". I. U I. '?). GL " 6" " r'.C'.1.f 1033.I I03. D 0-. I 0 1C.0,., ,...,., , , TOTAL NUM8 OF OPSERVa TI3NS3 430

140 ULO/AL CLIA1CLOGY BRANCH L SAFI T AC A18 flatvf-r S(pY1CE/"6C, PERCENTASE FVPUENCY OF OCCURRENCE or CILING VIRSUS VISIBILITY FROM POULY OBSERV8IONS S TA fin NUMRLO: 7,-229H STATICN NAME: VAN NUY CA rloicd OF R4COP: M821TH: 'AF HOUS(LSTI: 127C-VC3.. III.l ,... *oo vI 1117t0r.o*" IN STATUTE..... MILES o...,... o,* **... ". o I 'E I F SC SE SI G CE SC GE Gc 'Et Gf G E r' EL EC FfII I I, 2 I12 1 /2 1 1/4 1 /4 5,/8 1 I/ / ,.,o..o N" Cf IL I 44i6 ' j 40, ,7 Nd ". 47H.c F 4.J5n 1 7 " I S S2.6 52,6 7Z. ' b 52.6 S'2.b '. L I C,r 4?.T 7'CCI 4T.T 44., ' S2.S % f s'. Sit, I l' I 4.7T 7.? I ' ', Z.6 S.6 ( ' *.6 1 1,I S2 ' q h.2 S.:, I LPl ? 5 I ST.2 T S7. 57.? STI.2 S f I 221 4G.4. Ir. 4.4 r56., 50q. S.3 R ,.7 R.7 58.T. 7 s SO.? (C 9 r r1.4 I. '.4 b.s 58. I q. 58. T Cb.7 5Q.T7 b.7 u 8(7.r 44 4 C Sb? C.9 q q. 5f'. 6 7"dI o " Sb ' 5r.5 q q.9 5H.9 f cg11 4( '? '9.4 S9.4 S. S ,f,.'1I 4 1.T. 54.'H 61.., D 62.' " " f2.] Z.C 62.1 ' 47 I I '. 4 I " Q ,. 6'4, q. k ff 4 f, 'I --,' q.' T 6q.7 q F8.T 68.7 f-.7 '10 i21 SPS 64b. t O.? ', U 74.2 I..U 74.' T4.U T '.. 3" 7c t7. 7 7?.o 4 I , f.t ' 9' 74.4 AT.? '.I S8.1 'C 2>22 TT.T p2.7 OS.? 805 Nl., I, I)7 107, 71.' F2, ' ? T 02.3 p2.3, I'Ll)?, n 71." 0.- 'Kb 9I3 N'.4 'T.S N, , SUO " S S.3 9s I 95.3 q (,T VCVI ] "J.~ q,i QT.C b 97.5 q C 97,0 OT h 22? OI.i ? Q87 91, A q 84.S 4fl R A Z 9" , 7, A 4 A Q p!9.2 0, ,[ ' ST. o7. 98.' '.9 'U '9, o, q ' F ] j q ' , V7, ICC? J D J.L 01r 174?" 1I.' '] qt.m ot InO,] 11.C F 7.4.].] '4,' , lo1.f 17) J o..... o o... o... o , II )T AL NI'MP L D "rf OfRSF VA II)N, if,

141 GLOBAL CLIMATOLOGY RRANCH PERCENTAGE FREALENCY OF OCCURRENCE OF CEILI, VFSuS VIKBILITY UsAFEJAC FROM FOUTLY OBSERVATIONS AI WEAIHER SERVICE/MAC STATION NUMBER: 722P86 STATION NAME: VAN NUY CA P'El;; 0 Wpf CORD: M].7I-: 83URSILST7: O 1500-ITJ ; ; ' ; ki; ;,... C1LIN VISIBILITY IN STATUTE IN I GL SE SE G E OE G GE G- SL GE rl ; S L r E LF FEET I /4 5/ it? 1/16 1/ 4 NO CEIL I 40.P S GE , SN ' ST.N !.' GE E s S' u GE 14COO S , f S GE 12009j $ G6E 1000G N S f! 59. SN E 659. GE 9uGO A N q GE j.9 6'.9 6: u) SE 7(iDO I S '. 63, (, ? GE 6P ? S 61.S5 61r bi GE Q L 64.D ( tq.3 w.,3 b4.3 G Q r,e 4 '1 61.' ?.T , GE ' GE A R 6. 9 R0 R, Rb CF 2' P9.6 8R. q Q.6 q9,( GE 2' b LE I8on '.c GE IvOO ' Q GE GE T Q7.6 GE GE 95O n SE " be " ue sool 77.4 R Q ue q E D GE I R r3.0 T0" I SE 1r ".o I GE t0.) O total NUMRER OF OPSFRVA T13N: mm m m m m m m.m.~ m m mmm

142 GLOBAL CLIMATOLOGY BRANCH PEkC[NTAG[ FVOUENC Of OCCURRENCE OF CEILIP4 Y'1.'A V IA9IEL1TT UsAFETAC FROM HOUOLY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAME: VAN NU YS CA FI D Of [0RO: M'NH: 4A6 HOUQS(L'.1: 180 CE IEI19 VISIPIEITY IN STATUTE MIt... IN I GL GE,r GE 6E G GE GC GE L E " I F GE 07 Gt I f FEET I ID b /4 //16 1 '/9 SiV 1/2 1./ ], *,...*..,*,... *.** *......, NO CEIL , 54, i h ? '.4 'E 20OOO b p 5. tv.4 A CE 1g S I 5. I S'..I I 6 E 16C01 5J V. 9 S ' b b f (, '.4.1 GE R 62.8 b bv ? 54.2 t,1.2 GE 10l b ? J GE b S b ? 67.3 t J GE 8r00 61.! , ba.3 63,.3 GE b I b c 9. be 60UO g t ? GE GE I IS.2 GE 4r, U R.0 7a. GE Z o. 80. p 90.1 B o.43 A3 J.3 GE P b '.9 R S GF 25U 7A., Z S 8.' F GE 2" , GE Icc , Z.9 (f ] s '.6 95.b b b GE 1200c GE ? GE 9E A u E 4C o I.E lo ( 9,.? b GE ] S 9g bf ' , 92.t , 4Of9 81.r 92.c q GE c0. 1f)o (F? ] IO.O o E it iv1.o GE r , , O P.0 1U L NLM8P OF OBSR VA105: 930-4

143 GLOBAL CLIMATOLOGY BRANCH USAFET AC AIR WEAT-ER SERVICE/MAC PERCENTASE FREQUENCY OF OCCURRENCE 0F CEILING VERSUS visibi.ity FROM HOURLY OBSERVATIONS STATION NLMPL: STATIN NAME: VAN NUYS CA PErIOD OF RECORD: 78-8 MONT-: MAP HOURS(LSTI: CEILING 9ISIILIT IN STATUTE MILES IS I L G SE. G E GE G GEC GE GE GE GE 53 GE SE GE c E FET T I IE /4 1 'IN /8 112 /li6 1/4 j o ,...,..,...,......, o...,.,... NO C[IL 57.3 A1.9 6? b.? h3.; E 2 DOOO ; ? t.7 GE 18r ? b.7 bs.? &F 1b6rl GE 1-U' 1 6P. P j q 6q.8 68R. 6. 5/ 120 EI 6.P E p p T ) I E o. 8Cu J E 7Or'I 63.Q , LE ' '.6 73.b 6E 5C GF 4'60I , fe ?a.1 7.? so.2: no.3 8.3! p R.3 6 C.3 Bu.3s GF RD.': , R F 3 0U0 73. I,u A ,,F 25.,U 0 1,7q ') GE 20(o QI ,3 GE Lin1 7.' A ? Q U GE fpo) j L q, Q Gt ID GE 11C ,3 SE P GE LAC) ? g S G[ C , 98.4 "' , GS 6o1 76, , SE :LO GE 4o E GE 230i j.0 10, GE I f GE I ' lo'.o TOTAL NUMPL OF OPSFRVATIONS: 911 L. a..l

144 40 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FRRQUENCY OF OCCUPRENCE or CEILING VERSU5 V1IBILITY FROM POU4LY OBSERVATIONS STATION NUMBER: ATION NAME: VAN NUyS CA PEPIOD OF RECORD: MONT9 : MAR POURSILSOI: ALL CEILING VISIBILITY IN STATUTE MILES IN I GE GE 5E GE GE G- GE O GE GE E c o G E GE G L 0 FEET I t /4 I 1/4 ;/6 112 S/16 1/4 L ,., ,.,.,.,.,...,.....,.,..., , , NO CEIL SI.! GE J GE S b 57 n L GE S7.0 S ; a s 7.O 7. C GE GE 12f: r GE : z 63.z 6' GE ' S b1.1 GE 8E ? ' b GE ! Z GE GE GE bR " GE 4G GE 3,oC ?r Or 1CO ) Al.? E GE GE GE RA, A A Av.4 GE 15, I,E GE ICOO 71.8 P ? S S.8 9S.8 9S A.p GE 9 00) 71.A , ?b.7 GE s0a) 71.8 S A GE 70n R GE P.6 9A GE 3JO GE 400) E 100) i.e 2o D R q 99.R GE GE :10.3 TOTAL NUMBER OF OpSRVATIONS: 598 C -4

145 GLObAL ECLIMAIOLOGY BRAN9- USAFETAC AIR WEATfER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCJR9ENCE OF CEILING V4RUS VILIILITY FROM HOURLY O8SERVAITONS STATON NUMBER: STATION NAME: VA NUVS CA r'"io 01 GEC0PO: MONTH: APR HOURJSILTI: IVISIPILIT Y IN STATUTE MILE"" IEN E 5 E GE GE G: GE G- GE GE E Sr SE GE Li,i FEET i 10 6 S i /4 1 '/a 1/8 1/2 "/I. /4 *,...,.,. * *.*. *... * *....,.,.. *......,,,*.,*....., NO CEIL U ? , GE z2000o ".q b4. f, k. GE , S4.2 ie ? 6,.2 b4., 64.2 a.? E4.? G E 1400G b C,. 7 6S ES.? GE 12COO S L.) 6LT 6I.3 S. 7 E.7 t,,7 GE L EL.7 L7 6E '.7 6".7 b % GE b6.4 t6.4 GE 7ean 5z.z GF b 4 't.4 GE GE b4. 4 GE o GE 391GO GE l 74.6 GE 25 O ' '.a 75.4 be. 2i q A GE 1A2o 5.' ? I r GE IsuOl ? d , ,6 8V '.6 '.6 GE e P k6 6E 11l p k GF 9U , ;. GE1 1 59i A a q ' ' ue ? , h GE 60]01 s9., C q Q8.5 9A.5 96.h GE c I DI IO".0 t o C E, F OI SA ?' ' i' l7.0 I a.0 I.f S 1ll lo-,0 ID.O I.) IUO.3 1:D.0 GE 22 0j 5R D ,E I101 5A u ]0 lo.0 l0a o0.0 ID.0 1E ? , IJ l IU TOTAE NUM9EI OF OBSERVATIONS: 13 4 S6

146 GLOdAL 9LIMA1OLOG 91RANCH PERCENTAGE freuuency OF OCCURRENCE OF CEILING VERSUS VISIBLITY LsAlILAC FROM HOURLY OBSERVATIONS AIR weat-ep SERVICE/MAC STAION NUM4ER: SIATION NAME: VAN NUYS CA PE1I00 OF PECORO: M(NTH: APP HOUQS(LSI: CEVILINGILT IN STATUTE MILES IN I GE G SE GE G E G- GE G GE GE GE GE G E GE SE S FEE? I j 'l 6 ) 4 3 o /4 1 7/4 5/ 1/2 /16 1/4 NO ClIL 4 AR.? j Sb ',. 5, b, GE 2i 00s1' ,n D 9.3 t, 18, 5o.4 SS $ S 9.,O D ) c j O 6E a C ;,< L 142) d S 61.5, ,1.S,E I2Or a ].0 60.Z 31.J 61.z b '1 ' T 10,10', b.7 S;. r t C 1) ?.17 h2.7 6, t..7 I ar 0 0 j b,. ce 71' s ' t,.l 13.3 G.E t ' 59.s ' GE 504O b? b4.5 b re 45O0( S , , r 06 1 (, bb S.E T [ 3' P r.9 7,.9 TE 2' , ,F zt)00 61.P q.2 79., GE 1914 c b 1.s o O IE 15( tc f I5r 120( ', s.2 S a S T ) f, E 9 u f F P04 b I 3.4 P3.4 8q V4.5 9q S GE lool ' , S GE 60n 629 q L % b.0 Q U IE I u GE 4UO SE 7gO of di )8.4 9R be Z 9i.3 9S GE 041 6a TOTAL NUM[( OF ORSEQVA TINS: 9e5,- U

147 GLOBAL CLIMATOLOGY 9RANCH PERCENTASE FRGUENCY OF OCCJRYENCC OF CEILIN V'RSUS VISIBILITY USAFETAC FROM POULY OaSERVAIIONS AIR WEATHER SERVICE/MAC STATION NUMBLY: S1A11ON NAME: VA NUYS CA PE:PI0 of 6ECOVO: 7-A7-49T: APP HOuPSILSTI: 092o0-11Ci CEILING VISIBILITY IN STATUTE "ILL'... IN I GE GE SE 5E GE G" GL GE 5E GE FL F SEF [ G E GEr FELT I ' 2 1 1/2 1 I 4 1 '/4,/ 1 /I '/16 1/4 U.,..,.,.....,,,.,....,...,,.,,....,,,,,,...,.,...,...,... NO C IL I R 9.V 59.9 r69.a GE B Z 63.2 bt b.' ? GE LJOOl N7.Y S b 3.2 GE ?, , T.2 b3.? ,.2 6T G.F 14C b Lb.9 6%. be 12Cor)I 49. t7.4 b , ? ,7 G E b ? V 61.3 t h GE 9OoO j V GE l re 7ro A C i b b G E 5OJOl p.6 59.b,F S ' GE 420O11 52.Q To.3 7n : l.4 LE b i.9 G E 3 pis i B.3 FE 2,00I b 83.9 R e be U (l Q go.6 oe , GE 1uoI b , GE 70:l s O GE I:dl : ? f I , b SF Q GE 7001 b q Gr , q L, b or o j r.0 13'1., , 1130 G" '401 6I b lpo G F 3'l , IOn.0 1 o0o O0n.o OO.O GE 20 63S 'J 1.n Ino S, in ;" lf]o I J a u. O Iq3.U lo, O.0 1J0,0.,,...** ,...,, ** , *,,,,, *. ***o...,.,. TOTAL NUMBER OF OBSFRVATI3NS: 00 a

148 I GL08AL CLIMAITOLOGY BAN0F USAFETAC A18.4FATHER SERVICE/MAC PERCENIAGE FR'QUENCY OF OCCURRENCE OF CEILING VALL% VlIBILITY FROM 6OUILy OBSEIVAT TONS STATION NU6ME: STATION NAME: VAN NUYS CA P1[ 1) OF RLECORD: P1NTH: AP7 I OURSILST1: 12UC-1403 I6 I GL GE 3 G G L G G G G E G E IE G SE GE E G FEET /4 1 '/4 9/ /4 0..., o o o..... o.,, o,.., , o NO CEIL J 45.P : 63.b 63.2 u.: 6) ' i E , S.9 GE 160oo S '.9 6S.9 GE 147 4A R.2 6F P SE bp : SE q.? f SE C9.2 t SE f SE b be b , o SE 5 P ' SE 8S be 4Go j SE 3[Icc ' a, SE 3ou FE 2 C Z : ,E P ,F 1P SF JI v.:.2 98.z GF P I0P q8.0 SE 1I Q9.4 9' E Poo i A, Q OF ' SE 60c A , q Gf t q 'E : SE : SE 2[ ,.n0 100.D SE IL a 99.S o L. 0, L , o ,...!,,... K6.,...,......o.. FOTAL NU8LEP OF OeSERVATIONS: 930

149 GLOBAL CLIMATOLOGY 4RANC PERCENTAGE FREQUENCY OF OCCURRENCE 0 CEILIWt VPSPs vlibilit USAFEIAC FROM HOUILY OBSERVATIONS AIR WFATHER SERVICI/MAC STATION NUMPER: STATION NAME: VA NoYS IA PESRI Cr PECORO: CP11,: A P HOU SILST I: 10 1-I C,: LETLANG VISIBILITY IN STATUTE MILES IN I GE SE SE GE BE GE GE GE GE GE SE SF G L! CL SE FEET /2 11/N I 1/4 5 /k I 2 t 1b 1/4 NO CEIL b !,1.3,3.3 t3.3, b3.3 GE o0on A.U b t7.4 GE 18CO0 5S.1 6A.u B , b [ 16r0 55.i E.4 LE G ".? GE ,b J Lo LE ? GE , ' i.3 ue , , GE 7 0 5A.I ', GE 6rqfl 5P T.5 73.S ! be 5 CdL) q , ' G, E 4, J 7.j GE p q-.7 G E 35',P " 99.' P.3 3A3 8. 4b. 4 A p I GE p ' '. q nl ' R r, ; Y I. 2"001 7R~q (IL 1q (J i Q " GE I'UI q q p ',g b..f A q.2 99., ,.; AE 107P , , 3,4q f, E , q IE q( ?.7 q s A 9Q.9 G[ f ) q (IE tor ? 9q P9, (E 4 oi s ue O.0 13 Z0. 0 ' U InO. 0 1on.0 19c.C GE 200i 7' Q io '3.c IU bc lj I l0u.j H GF z l C.0 TOTAL NL'MPL9 OF OPSERVATI3NS: q o , , , o, a@ - - -

150 GLOBAL CLIMATOLOGY 8 0ANCH PERCENTAGE FREQUENCY OF OCCJR8[NCE OF C[ILING VFRSUS VISIBILITY USAFLI AC FROM HOU 9 Lf OBSLEVATIONS AIR WEATHER SERVICE/MAC STATION NUMRL: 722q66 STATION NAME: V4 NOUYS CA PEPOD OF PECORD: MnNYB: APP I0URSELSTT: 1l0n-23CD CL LI PGVISIBILIT Y I N STATUTE MILLS IN I(L S F j1 G I E G GE G GE GE E 5 i 5 GEE r,! E F FEET I I /2 11/ /2 S/To 1/ NO CEIL I F J T 3 b , 7.t GE I S 71. GE I GE ; T GE ' T S 7o E 12n0 I T T 7,.3 7q.3 7S.j G E 12Or) GE 93 On G69 T4.S GE Ib.a ?nf b.[:.E 7ojOl TN.T $ 7 7R G 6, ' GE: 5ooflI n p, bg 46UO : , AT GE S E5.7 E I , 4 f b 87.b l6 7.b b 87.6 P f- 6 r b ) I I.F , Q7.I r 10, S q S 97.6 GE l';o p (IE 1, Q ;7.9 tf I0u go0 I gq.t 9.1 GF quo0 82.? , T) -, O 'o I r uol ILO r, u! loo I l3.0 G r j IU.0 00.D 1.u0 13OD GS 13co 82 43q Qj: n.C L, r ? i73.n ICC.3 10j0.O 17D.0 fe I c u Do D 0.0 1O0.O.....,...,...,..., ,...,...,..., ,. o e0 TOTAL NUM6EO OF 005E4V611345: 997

151 GLOBAL CLIMATOLOGY RRANCH PERCENTAGF FR-QuENCY OF OCCJRRENCE OF CEILING V4R0S VISIBILITY USAFE7AC FROM HOULY -BSER4AITONS AIR weather SERVICEIMAC STATION NL'MBER: 722A46 STAT ION NAME: VA4 NL YS CA PELIOD OF PECORD: M4N71: APR HOUpS(LST): CE ILING VISIBIIITY 1N STATUTE MILES IN I GE G F GI Gt G G GE G GE GE E GE GE S ( L G F FEET I I P c 4 3 z /2 1 1/4 1 '/4 5/8 1/2 S/lb 1/4 1..,,,......,.....,...., ,....,..,,.....,,...., ,..,..,,...,,... N C I I 6C, I ? T ' LF,f)1L b I Iar(101 b S GE 690l b T q.5 SE 14 on z ' S 7S ,5 7, T5S G E 2CO1 6'.6 72., 7.? 7% , R 75. S9 7S.8 be O0fl C 9457f , , UE R8G n b q G E 7"UO C' F 61r) , 77.d GE SIS 0 b1.p ' UE 4ro3I J.b qi.b b SE 40On H Ae A E , A3.5 B.A R A3.7 B ,i 3 OrI R.5 a 6.7 8t q6.1 q6.? qt.7 ST 25" q q E. 2"J33I 73.6 p ' q I IRpGOI , C I UP, q S ).S ,.4 9S5.4 ' , SP ' q E )run A, q F.6 P.6 11 c UnI 75, ? t.6 94A q b 4.6 4q.6 9H.b,[ F U3I q Q fe 7 L I ) 4 I q ; r 6[ T , (, ) On. 2 I0.0 0Io I0. p " D fe 4Or J Co OO Ior0.p 1O o D0.r U F 30C q2.j I , On ' 17O D.0 SE , o7. 1i O * n lou.0 GS I121 'IS I09.a n0.0 1o7.' 1.03 InO.0 I00.0 1U.0 f O no O o NEW- 1 T14AL NUM4FR FPF ORSERVA 37N5: 936

152 blobal CLIMMLOG 88NCH USAFET AC A I FATHER SFRVICE/MAC PERCENtAE F8QUENC9 OF OCJ88ENCE of CEILING VFR70S VIsIBILI7Y FROM HOULV OBSLRVATIONS STATION NUMHEq: STATION NAME: VAN NoYS CA PCP(10 OF REC3D : A: APP POURSILST): ALL '' '-'*******','-*** *,**... **...- * * ricing 8V1SIBILI7Y IN STAIUIE MILES IN I E GF 3E GE GI G SE G- SE G E L GE se GE I6 GI FLET I An It /4 1 V11 5/f 1 2 /I6 1/ N0 CEIL ( P ,f 200O3I 03.7 Il b b L,5, CE 14a :ir) ! be." b SE 16g , b, 6 60, b GF 14 r3o 50 b Q q I b C.f 11.On) A b,7 697 b t0.7 fe 10333C P CF 8100) l CE 7U C I A SE 65UC) ) I S T.? ? FE 5c00 5q ? F 4itOr , S. 3 7S.3 CE '0O ? SE b ( A3.5 <,5 9 a n SE 9C , SE ' CE P P , P2.4 be AC1O ? E loud) A CF 12fIU b " 66 10O0 71.Q h , SE 9'0I b q H f, 9(et R R 9.6 P b b SF q , R , C. Q q E I q.2 28, p9. OE ? Q S 9() ,1 99.'s 99.4 " b,F ' Nj Q Ap CF 23o) ] q ,.9 q9. bf IC) ' I q n9.8 q8.8 A q9.8 9Bq ' P I'. *,,,.,,.,,....,...,* ,,,,,.,...,*...., *..,..,,...,...*...,,...,...,*,.* TOTAL NUM8EP OF OSERVA TINS:

153 GLOAL CLIMAIPLOGV P8N(1f PE[4NTA5 I R<77FN3 OF OCCJ[NC[ C F (IfIL '--''. L7 II I U7AF7T C FROM HOU8 7 L8 T HS7 QV I 77NS AIR WfATF[E StoVICE.,'MAC IT y STATION NUMBEP: 712q5 STAT ION NA4E VA4 NY( C A -[ E8 C ' 5,3.7'I~~~~ AL." TI: ". ".. " "1... "0.. 'I 1*1. Y *. 1. S FILI N S VISIFILITY IS STT 377 '.771' IN rl ; F SF SE 7 GI 57E f71 7F,, hi 7 7 FEEl I /- 21(2 2 11/2 i/a I 'I <7 7' " 'Ss 1.77.LIi I S 47T ? Ut', < ,7 N ) L 7L I T , IE s j1.? S '.' rr 7 ri , ,7 4j ' ' 1 4?,' 47,77 4'.7 '147 I, Is "l 3I " ' ' ' "7.7 '.? 47.7 F, I1'2- I " ,, I-. 4U. '.. 4.? '4., ' A T0 I7.7 '7 7.tf R.<. 6'.,'' , f 97-1Gal , f 4. 5''"4. 71 A 81) 3,.f ' b '47.7< l '<7.7 fe 7 ] 7 i f 5', I j ' ,- t,0 6u 'Flj ' u so.0 0 '7., 6. (,f 57-TL! t, Z 50.1 SO I.' 'E7.J,. 7., '. ' L, 4's IU f, 4, ' S Q77. '. ''7.5 ' F7 J(,0! 36." 4.b I p l ' ' " '7.4 'F[ L'") I !, S4.. 1 '..,4.7 ' s.7'.1 F 770n 39.6h 48.6 s. 53.b SS S.9 '5.9 5'.,' 1. ' [ I7 - L, r 4-.7 I c I S ' '4.51 I.6 (. G.F 2'C 4n. 1, 4. I st.? 61.7 F c ,. 3 4.q 64." ". 514 GT. Ip r 41. I' 5.7( F5.8 (' f,".' f '.' t[ I' U ,8.1,I ' )., , 7" ].3 7'. 77,l, _C J T.3 7S b 76. (I.' 7,. 7t b.b 7b.b L ' LI! 44.1 '..9 fs." R ' (7.1 6a.1 '7~!"41 4. '' I 4" q ' A4T.3 q.7.01 ' ' p4.' F4.7.4I q k It t ! '.4 i', 77s. R G '7. q " q V 3O '4.4 b A, , s2.7 ',7, In , 11.4 t5 7 S '. 7 l p S 9'..4S., '.5-55,' r G j , ; 95. s b.8 9h I7 U' 4(4., ST ' '.', S f 'CC, 44.5, 6.4 6S q '9.1 1u3. 'I" ,1F I77il 4.r,. F3.4 6',.? ' I J.0 Io C, "F ] , c. S , , , ,, , AL N0MR4L7P OF 0pSITvATI'S: 222

154 ul3hal C'LIMATOLOGY F ANCH PRC[NTAG[ F4r0UENCY OF OCC'JRRENCE OF CCILI7J; V,I ILITY 'AFE TAC FrOM F-OULY OBSE 0VATIONS A03 I R - ATI'. Sf VICE/MAC I AT1 1N 1U 3:L 7Z'45 57I ION NAME: VAN, y N UYS CA [4lI, E or 66CO0 : M'PTH: MAY HOUQ5(LST) : Jf6C7-D402 Il L 1G V0I5181#1I7IY 14N 5TTIUr ImILE' 1N I 63 3 r 57 SE GE G GE GE Gt GE <L G 3E re GE C ti,7 I I' /2 11/4 1i '4 1 /2 '/16 1/4 / i N n ClL I ' b.1 4f.1 4b.I u. ' I 3f.! 4.:. 43.b < q7.j ' if. a: 57.9 q 4.7? I '7" 0'7 71. I! J ' R 'f 12 '3 1.' 'I..' S j i.q 4 44q ? 43.9.F I.2 ' 3 7.4?4.9 4, ' b 44.) f 4) f '4.41 4' R. 4q S.6 b 44 t 4.6 4g.f b A 861 ' O 51.0 '. '' ' '2.1,7 71,0 32." ! , 49.b r 53..3I.2 2.2' '.2 7 #2Jr3 l7.' 4P.' c S1.5 5) '2]37 Lit 32.' ', P.- 5U S , '.6 A 4'377 ' I I 1.1 o. u n0 3., 41.' 4, S V, 9J7' 34, ; 's I 1 '. 5, '3.1 5! c(1on , 'b ' Sb.2 A 2'31'I ? 1, ' v 2" 'J 3H.7 5:p s ( b 17 1.'U 78.9 ' ].b 65.: r q '6.L 1 3n , 6?.2 66.b 71." T.1 77.I 1,71)2 0 4f.3 ' , IH , 1 F I :'37 0 I rb.l q I.[ 407l 4n A q7.0 '7.' P7.f ) A ".4 f , ).4 ' 4 9El "1.4 3[0.4 I 70r 4f '.' C I. p ,F n(:' r3. 4 "b.' '.' , p ,F ', 4o F4.I B Qt.8 rf 4(, ' J A F7' f' L. 4 '6.' ,7 r57n 43).4 '6.5 0, P6.B P Q ('[ 3I.97 4j. 4 '6-" Q QQ r5 " 'b P q , L t0tal NU4B OF O6 0'S SE TI- : 0

155 EOA L CEIP'A10L09 BANC- PEREENT A 5E FQ83UECCY Of OCCURPE NC E OF C rieli o V- rts vit 1 1L I IY L)S AF E A,C FROM P0UVLEY nassepva7 TO4S A IR WE ATHE R SERV ICE/MAC S TATION NUMBR:R ST AT ION NA ME: VA N NUTyS C A PEL'I0OUC 7EC'[0P: 77-A86 MHfIT,: 489 Y I: 093-I I C IN I A IBL S3 1r I T Y 1N S T AT UT I 1LS INS F - GE GSE E G E SG SE SGE 1 05 GE 1 EL 11F FEE T I f /4 1 '/4 ''8H 1/7/ 51 1/4 N.0 CUE I ! , ' uge 20o00 3o, F, q4~. 5.4 H 5b. S. SCE r H ~a q. 6 H.6 b 9R GE j I.0 76E.9 4S j S. 7 58R q '18.S E 14r Of] 30.0 r 90.3C 45 i " q GEf r. 6 40').6f a p. 62i.5b 6) LE 103 ) b I , 6. I.? G E 9'0? b , LI1.2 1 "1. FE a80! a S b fi. 5 b 1.5S 51. E : G I Il1.7I 7. 7 fi..i f3 62lu b f P q 631. H UE ' A M ', q CI. UF. 45 GO 3Z ? b t V.7i 63. f 3 67I b T ,E 470D D b64.'! C uf 3,00~ 3".1 05.g b I c , I (IE 3Pun 39.7 '0,O ? Il ,. 2 7, ' 1, 2 ' Go t ! , ? ',.2 A S.2 4 5, I LE h lb H86.9 IF E i1i001 82e t I Q.j I ~1.I I I 6E 1212V) b f,. 96.0u c u r Io T U E q ; p ' R F ftool " 99.3 p q9.7 (IE 703UP Q~ q bgf 63U b.S a u F , b '3. I g R pq SE ' , :0ID.0 a700n. ro j. 0 6 F '00 4, Z lt j.o iorc GI F 3-0U 42.6 C qj Q (0.1c I CIO.0 130D. 0 S E T14 4.6, o. 0 10f,.p I 10.0D u G F ce ) A 170.~ j2w?.fn I7U IAL PIUMPFVP OF 09Sl87FQ9VA 11099: S 3 F, 6.4a

156 GLOBAL CLIMATOLOGT BANC PERCENTA 4 [ FVQOUENCI Of uct8j"f NL 1; L97 I,... I USAf! TAC FROM 'GUILY It4 If P I ' AIR.FATHER SERVICE/MAC STATION NUMPER: STATION NAME: VA! NUTS C A. : EEILI VISIBILITY IN SI&IU' U I It IN I G GE SE GE GE 0Z G SE L. 0E, FEET I 14 S I/. I/ '8 I, l1t I'. NO CE1 I S '.7 I,,.. '' I.6 ". G; : b I : *.I I -- I:.i IE 1[-- c00 3 T , A, I I G0 1601o 33.7 S0.0 IS , 67.? b t1.1. I -. l 6V.I -.1 s*l G i"c'i r b P' F ,~ GE V D.I ) I.1 I GE , U.8 7).P. A'. I IE (.1 51, T " GE ' ' ; 0 700! E gS , *? ue 6poo , I.. 1I.? G '. 7 S.2 71.? '3.2 7?*? 7 3. GE 4c , , S I S.1 GE V4G , : I GEc : q GE ' I b s,, qq ig.b 89.6 '5.6 GE , GE , GE i ,0 GE ' IE q ' G6E 1UO R q s ,F GE : O* GE q ? "79 ' " GE , GE '0o o o. lo.0 GE , '0, GE ? Ion. 7 1n GE G E na00 O GE r, IO. 13.O A rotal NUMBER OF OPErVA TIJNS:

157 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATIFER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCJR8ENCC OF CEILING VFRSUS VISIBILITY FROM HOUILY OBSER9AITONS STATION NUM 9 LQ: STATION NAME: VAN NUYS LA PEoIO0 or PECOPo: ONII: AY POURSILSIT: 150n-1703 CEIINI8SIBILITY I N STATOTF MILCS IN C E GE J C G re G. GE GE GE GE 11t Gf GE GE GE SF FEEl I L / I /4 1 '/4 ;/A 112 5/16 1/4 J,...,.,*,,,* , ,.,.,,......,...,...,,....,,,...., ,. N0 CEIL J J 6F L0GO N.S ,.5 7N fc S.' N S be 1600l s Q S N.5 7N Ut 14') , t.Q be T.? ce I 0ur S GF 9 OI u E 8nOf A f, ? GE 600C R GE z A GE 4'LPI AI.I I a St ,71 7S S E ' LP A.! b.7 8R OS q 4.4 B bs 3T001 b R5.8 p R Q Q Z.9 f 2'-,0I S b b.6 E b b 99.5 q N9.6 1; A GE I o, t , A.6 98.b t SR (7: g. b b'.6 9Q ,5 99.8( GE q'., GE IUOI ? ) , St 9uo C GE a LE lo lo.0 6[ 1 0, R '. 1o.o lo0.o GE A I lon.o 1 0O , Ft 4G s o (IF C 200$ o.0 LO.O lo bf IO P q o0.0 1on loo.0 1o Sf P IO.U TOTAL NUMPE[ OF OBSERVATIONS: 930

158 GLOBAL CLIMAIOLOGY BRANCH USAFETAC AIR WEAIHER SERVICEIMAC PERCENTAGE FREQUENCY OF OCCJPRENCE OF CEILING VFRSUS VISIBILITY FROM h-oumly OBSERVATIONS STATION NUMBEY: STATION NAME: VAN NUYS CA PERIOD OF WiECORO: OT6I: MAV loursilsti: CElLINJG "VISIRILITY IN STATUTF MILES 1N I GE GE E GE GE GE GE GE GE BE SE Gt G E se GE C FEET I /4 1 3/4 5/8 112 /I6 1/4 N0 CEIL I S 73.5 GE GE 1o83o C C GE U GE W P LE S 7b.5 G F C C PL.4 GE Ho GE 8ODl q PO.4 8P GE 7O ac. go.s S GE b 80.7 o AJ G.7 bg GE nP b be 0 1UP SE 7 opl GE Q Q I b F G E b 6E 180n J GE p GE % Z GE ICC S S GE 9g b b GE , GE 7J , GE boi " GE r b o Gf I n GF be lo.o ( GE 1Q Ioo lf Io.t I GE TOTAL NUMBER OF OBSERVATI3NS: 929

159 GLOBAL CLIMATOLOGY BRENC- USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURRENCE OF CEILING VERSUS VISIBILITY FROM HOU9LY OBSERVATIONS STATION NUMBRE: STATION NAME: VA5 NUYS CA PEPIOD OF RECORD: MONT-: MAY lours(lsti: 21P-2300 c ILING VISIRILITY IN STATUTE MILES IN I SE SE 3 E E GE G GE GE GE GE GL GE GE GE GE Tf FEET I to /4 1 7/ 5/8 112 W/16 /4 U NO CEIL A GE 200o ? GE , GE , ' lie 140Uri b j D 74.D C GE 120G ? ' GE re , GE S LE GE o , GE S DO ,. 4 GE J A :2 GE 41 o r P GE 3S , G E 370( GE be fl : re l I GF Isoo1 6 S I GE F 97 A GE I100 65, b y S.b sr c GE Fmrh (GE , R 98.L , E GE GE 47U GI 30o U O.O O10.D GE ) GE q , GE H TOTAL NUMBER OF OBSERVATIONS: 777 C.,

160 GLOBAL CLIMATOLOGT PRANCH PERCENTAGE FP1 QUNC OF OCCJRRENCE OF CEILI NG VE9RU AISI8ILITY USGFITAC FROM HOULY OBSERVATIONS AIR WEATHER SRVC/MAC station NUMBER: STATION NAME: VAN NUYS CA P11OD Of PLCORD: M O N 14: M A Y O U S L T I : AL L " '''' '"... "'... ''''''' " '''..."... Cl IL INS VISI8 P TN STATUTE MILES IN IGE GE St UI SI GE 6 I SC Al G L1 E1 G1 Et 0G G0E4E (I FEET I I '/4 i /8 112 /16 1/......, , NO CLTE I q 62. h ] 3.3 b3.3 LI 20E S.5 6S.5 6,.5 5.A ri 18C001 4C s ' Gf.L ,6.5 Lf Ib S S.S b.s 1 14"I0O o '6.7 Ul b i GE 10300) q.?' ) n.3 '3. ol ' t.0 b.3 I 6n03) b b A ) 4 2; P.4 L5.4 LI 6000) 42.P ? 6.3 6P , t.6 0E 5700) 4.6 t Q ) q ? E 400O /2.7 I, A.7 U ? G 300) I , , P) :-.I I,1 2oOJ 62. A A CF 20r0) P9.3 8.Z A9.6 9p ) 64.' r q ' , 9' C ) b q4.- ' , Q0 54., %. q b G0 PGO j GE 700) Al 600) S ? A R." G0 60J Q. q Z UP ? Q , I 700) ' I Q Q ol GE 10F, f , 01 0) ".q q ,...,o o.oo , o* ,.... TOTAL N61PR O OSERVA 3 T S:

161 GLOBAL CLIMATOLOGY BRANCH PECENTAGF FR: UENC of OCCJ8PENCE OF CEILING VrSU VI518ILIT USAFET AC EROM HOURLY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBLE: STATION SOME1 A54 NUYS CA PE',IC Of PECORD: PONITIF J1N HOURS(LS T: S0S CEILING, o*..,.*..~~~v VISIBILItY. 'I... S,.., R*,., *. 'I * IN.. STATUTE.... MILLS. o....,......*, IN I GE GC E GE GE G GE G - G E SC 7 Gf GE GE GE s EE I In j' /2 1 1/4 1 1/4 5/8 1/2 5/16 1/4 0,..,,,.....,....,,,.,...,.,....,,,o,...,..,,....,.,,,...,.., , NO CElL I 77.: z "q ue I, b( GE 18COO ' b b (5., L7E lb r C.5 6n7.5 62c. se 1400O J.9 61P o9 : [] c. 9 (E 12cunI t1.9 3< b5.9 GE 100, uf 90of l b1. GE 8000! u t ' ,' F 70) G '.' f GE 60Or' ? GE 50O GE GE A be GE P GE SS Sf '.6 65" (,G lor S b Ef 151o B.7 7" r E I2 )! ,3 GE 1C0P 39., " o.u 8i ' R0.U,E Q ' GE ' 8U A b.2 0 GE 70o C R p GE Q be 'on0 1' ? n fe 4 Or!o. 56, GE 300! b 7 b GE (L ; Ioo.o GE TOAL NL'MPE8 OF O85ERV113N5:

162 6L04AL CLIMAIOLOGY BRANCH PERCENTA5E FRQUENCC OF OCCJRRNCE Or CEILING VSU5 VISIBILITY USAFIT ac FROM HOURTLY OBSLRVATIONS AIR,6WEATHE[RgSlllVICEMAL ASIA0 NUMLQ: 22q8 A I ION SAME: VAN NLYS CA P- vio OF PECOP: MINT,: JN HOUQSILSTI: o o......,..,,. o, oo o ~., o~~o oo C *ILING VISIBILITY IN STATUTE NIL... IN I 31 SF i be GE G 6[ 6E St I E 'f. (F G f A b r 6761 I , /4 1 '14 1/8 1/2 /6 1/ ,.... I ,.,...,..*o,.,.,......~ , *... o.. N0 CE I ' b m s S3. 5'.' '2.5 '' SL.5 b[ 12"C1O a 2C G.4 5' I S ' E Iti OL S. 52.S S.S 5US S2. 52S U.S5 br I uol 2q.! , s '.,, U.S GE 14 1O 29@, 1,. A SI.' 51.? 52, ? ' U E I220 3O si. I,Z S3. b 5.6 '1.6 5' S.6 c1.6 S'.6 'US b I C 0I 30?1 ' U., Sz. 54.I, 49.5 $4. S.5 5L , S ' O 'o S', s. Us54.5,.5 S4.5 q4,5 Gf 9C0 31, : ' () 7200 'I ' S,2.S S 4 4, '4.9 59,.' IF 61on Uo' SC , "l0b.' S 3. 4 $ 5.6,S S.1 5'.1 SS.I "'.l SS ' & ' S, SS S. 1 S. S SF 20w , S.) 3.48; ss. I' 5' '.I SS.1 SC 3' " t ' '3. 5'1 5S 65.5 S , SS.5 5S.5 55.e Sf q,4 SS.8 SS.8, S5.8 S'.8 SS.8 SS,9 SS.8 SS O31 32.r :2 15 r5.1 'S , ST.) : ',8: " 59.7 : ".? C2 IR0O ' 5. 59, ).5 b1.5 b.s 615 b SF 10 11,3 4h , b SF 12'c' , t, IGO A ,4,L qo 1.5 S , 1.a , l6.3 GF B.8 Sr R , G I F931 7I ) o ' SC 51r o ' ' 'OO 31.S ,b [ 20:1 3.' :." bs l G '.5 so q a TOTAL NU481P OF OSrVa 1 5IONS: 499 we

163 GLOBAL CLIMATOLOGY BRANH( USAFETAC AIR WFATHER SERVICE/MAC PEENIAGE FR:UENCY OF OCCJRQENCL OF CEILING VB6SUS VISIBILITY FROM POUqLY OBSRVITIONS STATION NUMBER: STATION NAME: VAN NUYS CA 'E"I30 OF PEC0PD: (,N14 : JUN 3UPSu IL ST I 09J. I OD LEILING VISIBILITY IN STATUTE CMILES I N GE GE 3F G E GE V IE C G- GE GE GE GI GE I 6 E L FTLT I 1( lf/ /4 1 '/4 5/ /16 1/4,,. ** *...,.o..*,.,.,,....,.,., ,*.....,. *.....,,,...,.,,,...,...,... NO CEIL 26.8 l.l J '.? GE O0T0T A TL Ill:, I. be , r [ I6tGo0 40.B, 3 S.1 6.b , r] j.3 7'.3 '3 1E 1401U GE GE IO D.2 72.Z U U ] GE GE 80o ' GE a ' GE 67o GE 5OO A ( : , GE , , GE 4POO c q , '1 6 E GE 30O L 75.P S 1, 205or 71.Q GE s BS b A6.6 C t GE 167I , q1.? 1.2 q1.2 GE b GE , l GE go ',g , GF Rl q q ,7 q GE G E * GE b q Q bg : 1O 0U o G , 100a O0 GE GO GE I0.o GE OO TOTAL NUMBER OF OSERVATIDNS: _

164 GLOBAL CLIMATOLOGV npanch PERCENTAGE FR8:UENCY OF OCCJROENCE OF CFILING V' LJS VIB191LITY USAF T AC FROM HOUILY OBSERVATIONS AIR WFAT6ER S ERICE/'A C STATION NUM81P: STATION 44ME: va N NUTS CA PEP100 OF PECOD: MNTI.: JUN HOURSILSTI: 120C o.,,....*, o.....,,.....,..,...,.. o,o,.,.,,, , , CrIN 9IS0F3L039 IN STATUTE MILCS IN I G GE O[ E GE 6 G G GL G E SE GE GE E Gf FEET I 10 c /2 1 1/4 1 /N,/ /1 1/4 0 *..,,..,...,..,....o......,,,o...,... o.,.,..,,...,,....,, * , NO CCIL E 2-0lC S E.0 d U C A4. (E f.3 SA.9 7) GE S6-7!a.9 7J a P GF 14rO0 37, I r a 09.2 '. GE 12G J OS S.1 0S.1 E C a GE 9n ? b GF U 7' R7.1 GE ] R R7.1 UE U p7.1 o7.1 ;7.I E SC P G E 49U ' F 40DO P 7.6 GE 3' On , p. R 4.7 8R.7 qr F ". 9.'.2 92.? ?. of 2t001 4r. P be ).6 08"9 96.] GE 18Do Q GE ?.3 9' GE p ' ue In r H S I0go U O IO GE j.L l1p.r 1(0]. C I0.0 1Un.0 1:2.0 GF A00 I 1.P CO a 'J.0 LF , ino. 0 10r.0 10) I IU GE f r C U. GF 93 or h L.G, 1F CO , J I1o o GE CO4 l h O.O I C7.O. 1O3.O C.0 (r A U G F Ion ) a O O G.0 GE l q o 1O0.O I0o.r TOT AL NUM PE Of 8T 8V TIONS 9j

165 GLOBAL CLIMATOLOGY FIRANCH L SAFETAC AIR W[ATPER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCJRRENCE OF CEILING AFRSUS VISIBILITY FROM F-OUILY OBSERVATIONS STATION NUMRIA: STATION NAME: VAN NUYS CA PEI00 OF PECORD: MONTH: JUfj HOURS LSII: CEILING A ISIBILITT IN STATUTE MILES IN I SE 5E E GE GE CE G G EO GE GE E G GE GE GE 1r FEET I 1r F 5 N / /4 1 '/4 1/8 1/2 5/16 I/ 0 NO CEIL I 52. P 6.1 9). 82.? I 5.1 as S.1 R I WE ZO0O B A A ,7 R S.7 G E A.? A aab P.7 asi SE A F A NA.7 A.7 GE 14CUO3I 5b.I s j ,6 R R b GE N " n, 9J. GE J.9 8i g GE 9C ! f , GE 80UO A GE 7C as q SF ? GE SOO ] q ? GE 4o j q GE _ , SE ? E S5.b ' S ? GE 2 0 5Q ;7.4 SF F F s P (SE IRol p GE l GE O n I U Ct.U GE I U no.o IOC.0 193L. GE b o o00o o lo.9 GE b A J I O G G0.0 1CO or.0 1CI GE o ".0 103) no.0 1UC (I F U lno.o o0.0! G GE 4UOI 67.1 R l O I0.0 10p.7 I GE I ') o , GE ]. ILO l nO.O E I P ? I1oc.0 I00.0 i00.0 t i no.0 1O U E I b 100 ; loo IaI.f lo ,, , ,...o..,, ,...,......,.... TOTAL NUMAFE OF OBSErVA TIONS 900-4@

166 GLOBAL CLIMATOLOGy 8RANCH PEkCENTAGE FP- 4Ur4Cv Of OCCJANENCE OF CEILING VERSUS VISIBILITY USAFEIAC FROM 00LY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAME: VA% NUYS CA L IO or PLCO D: 71-8f K 9H: j: I H, 8Uq Cc fri L 03i4L2 CEILIG 19AiSIBiL 17 A IN SL TE TiLE I9 N GE GE 37 f E G c 01 G GE GE ELE GE 1F - b f FELT I r C e /4 1 '/4 5/8 1/2 /7 /I I/ L.....*., * ,, , , NO CETL 1 A.0 82.I p8, GE 2FC , , A P, GE 187'0O0 b H8.9 A9,I B q o QqB I ,F 16OUO p sq., s P9. 9 P.8? A9.8 H9.8 q GO S ;9( q0, I.3 1,L 2oo1" ~ n " n.9 ". SF I "D I 68.C q5., , ! 1. G 8.cGOI 68. I % '1. "F 72, I b8. I b q 9i i I.9,1 627G0 b6,. %.2,3d '.? CF 5Ug 6.2l8R. 6., D J 92.i O u ', I 7,9 4',2L p , ;. (,L F I i i , 1 3' i r T i,7 2LC , ',.1 9t6.1, P. 1.; 34.? P.I I I i FLo 7.8 A, & b (,1 1 ' 7" 1.P " >.0 89 Q j 6 E I17I A.' Q9.1 q l 9q bf 17,7n ,.i 99.' Q s I,! 9( , , 'IF 8> g G,7 7, A 1.7 9;. 97.I a ,. t, , Q g. f 'U" b ll.3 lo I03.0 I'O., Iu7. n 1[ IOP.0 I:0.2V (F 0focl 771. I IO0.0 i D.0 Io I00.0 I ic I IUO D I.V I12.( v.0 2, (I s ,U.O ga1. I O D I10.0 F[ II 11. p I IOU , O0 6F PI ro I I o 1O O.U......**... *.,,......,,,..,..*,,,,, ,,.,..... *...,.,...*...,, OrAL NLIM;9P OF 08SF RVA1IONS 930 _,i,

167 CLAL CLIMATOLOG -ANCF P[k CENTA5E F:QLUECY OF OCCUOECNCE OF CEILIlb V L VIIIBIILITY USAF LTAC FROM HOULY OBSLOVATIONS AIR WFATHEP SRVICL/MC STATION NUMOF : SIATION NAME: VAN NUYS CA r EJ100 OF IECOR[: MNTf : JUN I U7P51L3T( : ,*...*.., o,..**....o c LI VISIOILIT 7 IN IATUTE MILL' I N F L 57 3F GO GE GC GE GE GL GC 4 L G DL E CE c7 5 fele I I/P 1/ //4 I 5/6 1/2 /16 I/ NO CFIL I 61. I 71, c b6. Rb t.i 7 U '2. 9s f.4 q A 6.S ''. 'b.v ( u L18I f, i3 ' a q'. P'7.0A q (7 16 2L2 6I b P'.? A A.6 '6,6 (7 14' H p F '7.3 AT3 1,3 F 121I[1 6 a R F7. ue IGr ! o2.3 b F P '7.7 ut 92L, P "7.3 GE ' ' P a 7.3 P7.1 f7 T rc8i 62.7 p ' '7.' '7.3 b F q I a q ' ' q7.3,E ? A 07.3 q ' ! '7.3 (,F 4 i t 6, s (I7 ~ AI '8i 1! R P7.f, V7. 6 A3.3 If rn 6E , b R 7.9 LE 25dlI J y-.r Q 8.3 9?,3 90. f [ 271! A AI T P q Q UT S ,7 LE I'I0U 1201 I p ! ' ! ' F E 120: ' '07.1 p7. 6 7=.I Q 7.6b '7.1 Q ,7 I pon p Q q. 1 9S'. 7.I R ?[GO q q Q8 s 9R.5 Q , ' F r (oi 6' ,.4 9b , ' (I 0CI ' r 0.0 1', i "3. 7 3GO IUD.0 1o'.9 07I naio l b3 F P Ol t a." O. 10 7l I o r F 0f n '1 10 n no ,.0...,* ,,,...., *..,...,.*.*.,,.,..,,.....,*..*. * TOTAL NUM71 OF 0750QVT13N5: 751'.4

168 b60, 6AL CLIMAIOLOGY 9AN- PF38CENTA3E FR-'0U3ICY OF OCCJRRENCE of CEILING VES-S,B1ILITY UsAFET TC FROM HOU7LY OBSEP471NS AIR WE AIHEP LRV4IE/PAC 3IION NUPPLQ: STATION NAME: VAN NUYS CA'E"IGU v O I 1 H I N HUQSILSI I ALL CILI'iG...*.. "1o G,.... "4VSI41L1T...I....., I*.. 9N. 14 No. 5TU4F.*I A'.. I U,...E..'31TE IN I L 6 33 OGE GE GE GE G G G GE >6 3 G L,[ SE C E F E E I 1I 'E / 1/4 1 Il? 1/ /4 1/16 / 4 - Io,,ooo....ooo o o,.o..... o N.0 ClIL , S.1 I ' I EE 7P , 63.f , o.} '.? , 3 30! b b ' LF 14"f'r 46, ' Q , ', p -. 6 V 6 I 0D 4f, M.9. 74, ' SE 10 CCn b, ,3 93 o 3) Q.C 19. 7q ;.7 oe 8 C ,I ' f I 3 n :" , 7, D.1 D P0.1 p.i.1 X1 se 6J 0 I 46, ' 1 M [ o'.' 6] H f, *. E Sr3C , , D '" Pj P7., L p b J. I B , 8P A.5 3: ' q P-.b 6r.5 N 0. F6 O 1l A, R8I P q ( '. ' ".4 '.8R A.9 a, Q b9. 9 I ',1 7527?.7 6, R P7.5 81, '9,5 f,3 2(; 49. 7b. 14.L; A".1 4a A7P, R7, E -i 1 q201 4).A RA s b0.f, p8.b 98 9,4 bb.5 jf ISG' A, q89.; 9j ' qi qi. 76 I,G q * q ', ',N q9. 9'.o 97.9 uf I 0'I 4' S ', '.7 95).7 (IF 5W3) r d ,3 94.7) q5. 9,2 9b b S f, P l 37.P r ; , I n 2.b 671. P83.7., ( ,1.I q F 6u1 I '' R I q Q4. Q. 98,5.6 s8.5 9, b 6. ' 3 3 I C37" f rl q q qq I,6 4(it c 7.6 ' q q yl7 uf '073) 50.3 r q ( *N , ,. F 7303 GlI.5", 72.t m ' b q9,9 1 r) C I.). la L.L 120? ne 5.n ' L'.E ln,3 10) , p, I o o...o....,..o.o i3tl 44MQ P OF O"S! VA71)7N,: j4 4

169 GLOuAL CLIMATOLOGY BRANCH USA FEY AC AIR WEATFER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCJ8RLNLE OF CILIS8 V'P8,6' Y1,IRItIAY FROM HOULY OBSERVAIIONS STATION NL 89: 728b6 STAT ION NAME: VAN NUYS CA ICC1 OF PECOPJ: TI-MA M ''NTy Jot PILRILS ) : 3 JI-753 CEILING VISIBILIT8 IN STATUTE MILFS... IN 5 L GC A L GE I E G GE GE EL GE f L ; f SL 1. (L f FEET /2 A1/4 1.'4 /8 1/2 1 /16 1 /4 NO CEIL I 49.1 I5.? , I 7o I, I.0 67.n ,q 71.R ,6 1F 18 r,00 5 O T " 7.? P '1 IF 161!001 5q. ' V q be 14 j T T8. T g R q.7 7'.I UE 12.uol 5C ' ,.7 (E OO01 51.T ".4 P P ,E 9r01 S D q A].4 8n.44.4 GE ] D J GE 7O B A ).4 I. 4 82! E b6.8 8J " (G 'Couo P '.. SE RD R GF NPO * ",.4 (be o.4 o R.- be q 82D A GE 27L7 S1.S I u O " R ,.4 "I 2ro0 O AI.Y GE s R1.3 5E 151O e 8' ,.I,, '7.5 GE q oe uoi ' b q8.7 6" A.T 0H.3 GE POO )1.9 9.q J Q of " q : GE F8'I C Y Q ,.1F SOol si.! R3.S bf N or''i 5.I 7D ,, 87.R I CF1 1UO J Q.6 94.b,f iou p g I100.0n 03.00J t,.j of Ion0 I It! 83.5 a7.r l1u0.0 (rf B Q DO O lo ,.,......,..., o....,...,,., ,...,...., a In18 NU MP 0F OSE8A T1127S: 230 L

170 .LOhAL CLIMAIOLOGY BRANCH usaee C AC AIR WEATHEP S 1RVIC0/MAC PERCENTAGE FRE0UENCY OF OCCUPP9ENCE OF CUILINL VruRtS VI 'I8ILIT FROM FOUqLY OASFR4ATIONS STATION NUME9: STATION NAME: VAN NUYS CA rp2c7 Or ECORO: : t jut I-OUPS(LSTI 7: I C CEILING ISIaIL11Y IN STATUTF MILS IN IE.. GE S GE. G- GE G GE G E 0, q l ', f7 FEE1 I / l/n I ' /6 I/4 No C. IL I , o T I. b. I... " s IF '.? 74. 7,..,f q b o.j N.b l EbI00 44.q v 3.4?4.. o 7 III0or k I 74I6.. if, 2 7b.s 7b.6 b.b 7b.b , 7.', b o.t uf 122' ?.q q ',I A I ? 7 1,.7 1[ 9 r ? , sch Iun 99.0D b ; a 79.- I4.8 79q A ; j I ,F A.c , b '. 4. h 74,9 TA.9. 74q.9 S '.I 74 5 r q ' T.9h 74~ U1 L 5nC1 98.C ' , 79., T GE 4'Onj 49, l.* , GE j ; q i98e ?4.A , Ao.9 34.A 7.9 'q q 7E Z50O S , ' A ,! b? 75c R b q I.6 ' I, 1 0n1 49A ,' A7, I A r.,.8 )', I 8'7.8. I. a I. I, 9, PO I 99.1I p I '. ' 1 47i A p. I, , IE 1Ir1 9A A 8.6b w f-. '" R A6.1 ' 6.. 1, ll 96.; 61.5' 35, ' - p S 99.5 '.S m9.5 "44~..5 4.' F , I q , (1 T r 9. Pn b I a.1I 9k S '-2" 4.' 9. ~.. 6' A.2? 61.6b 35.4? 9:). 6 94'. 1". 95.2? 95S Q.9 S GE " r I~0 99n b I 3.7I A 9.j 971.7I ~ L. f X b I A '., ' , 74. " 99.9A q 11 N 0~ pis I q ' I I I '11.) I:.: I 'f 99.2? i t % 9q ?103.2aI I'j.9 1. I I I : I A ' A 9? ro.0 c)". '2I I Q - 1 I' J I '.f rl s. 91A.2J 9 I1. I C) j )' I~~ I2. 7'J. J11 2'. I'. TOTAL Nil MRLP OF 0PSFRV A T1N% 413C C6.

171 GLOtiAL CLIMATOLOGY FiRANCH USAFLETAC AIR WEATFER SERVICE/MAC PERCENTAGE FR-QUENCY of OCCJPPENCE OF CEILING VVRSUS VI0I8ILITY FROM HOUIY OBSERVATIONS STATION NUMHEQ: STATION NAME: VAN NUVS CA Dr I100 U RECORD: MO7JTH.,1m) HOUPS(LSTI: 3039-l103 CEILING RISIBILITY IN STATUTE MILES..... IN I rc Gf 3E 3E G GE G E G GL GE,L $7 SE F I 3F FEET I /2 1 1/4 1 7/4 6/h I/1 6/1b /4 1..,......,,......,....,...,,..,., oo,,.,,... o o NI CCIL I. ' R p9. 0 e -.).!] A.O. A,. ue1 21u"1 L. E " R s5 9i. L 18 f)cl P ot, A9.5 hr.6 06.b (,E 16,0 01 3P R.5 8'P, '8-9.S' 9 Pr. 8.s 4 R8.5 A9.5 P'.S U E 14PO T 9.' ,.9 A O ; o C.1 Sf 2001 I (,. 7.6 R R Mo. a Q. 9 g C.9 '.4 J II C G0F F S.4 92.o b RQ ?.6 p76 72.b 42.7 CE 9 u1 439, I 8 C S ' b he 7 0c0,1.n , ?.7,.7 4,F be0'1l TS q qi.7 SC C E 5W'C.'I 9I.'] 0," b } Q ' CE 4'U s '.7 9,7 FE 7'Cao Z.7 u 1 7'021 " 41. 1,, q t 9"2.9 Cf 2' L ' , E f 2L , IE IAl S ' C.F 1 _n1 41.b t9.9 8j ' rf 12L) 1 41., s ".l A ',r IF " D.9 Qo O ti "[,I f i3 A1., Q If 41k, j1. c mi.i ( C'.fl J., 1,' 4>'I 47 7 t: 8.1 9,1.2 99o J "O.O ,-I 41. L o I1 9 1 I.I 73.L 1.I q. go.b g 1o. lo ), 1 03o , 0 '11.1 9') : 99, o I1' o I03.0 O a f f , I LV.0 1 r,0.0 1.r O C, L0, p , r.0 1 '.(1 1'o o. Io o I.! 1 1. I 7,.o 81., 93.2 g9o~ I0C,0 1'0 1 C0.U Ip.O 10U.0 9 'I.- 7., A o.o , ,. [' IO.0 1o.O o..,,,oo,...,...o o......,,.o.....,,=....,, _ S In3L N1'"91 OF 0111r.7r IN

172 SLOBAL CLIMATOLOGY BRANC PERCENTAGE FREQUENCY Of OCCURRENCE OF CEILING VERSUS VISIBILITY LSAFETAC FROM H0ULY O6SERVATIONS AIR weatfer SERVICE/MAC STATICN NUMBER: STAYION NAME: VAN NUYS CA PEOIO0 OF PECOPD: MONTH: JUL HOURSILSTI: 120C-1400 CE II, 95 VISIBILITY IN STATUTE MILES 1 I GL SC 3 EE G5 6 GE G GE E L GSC GS G G E 1F FELT I rt., / 2 11/2 1 1/ 1 3/4 5/8 1/2 5/16 1/ ,., ,...,,....,...,, ,......,..,...,...,.... NO CLIL I z q SC I 1C ? LF I8L20I ? '.' IE 16,309 S ; u, S b.8 uf p ? b F -,n C, :' GS gf on 56.7 A6.7 9T? q7.6 tf 8 'C te 7('10 5 f, ' 9.i F 'f F 4.7 y s b (E 5 su7i 6.3 A B E S T T G. 40O Q A GF 35 LI 5b.5 l4.s 95.s 6.j 9 7.b B A.n O GF 3' CI S56.' 84., q9.3 9? f i nli 5,.7 A b 99." b F "on I b 99.1' * Q u I , ? F. IDO 5.7 A j (, 121( lo ) 1U07. C G.0 (E 1"3n ,0.0 1O o IOJ.2,F 9U (IF p F ILO q. 7 q I1o i3.n I70.0 1o E 6J RS.9 9s t I0.0 IJ E 5,f0J ! o I ,E O2.0 I2, no.3 1i7.[ GS '0r 5, o.3 I I GE 70'3I 56.7 PS I cc i O0.O IQC.n O.O C sr S.9 9, ? I o I ,......, ,.....,,...,,, ,...,...,......, OTL NUMER Of OBSEAI3NS: 930

173 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEA3IER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURPENCE OF CEILING Vfk9US VISIBILITY FROM HOU4LY OBSEBVAIIONS STATON NUMBER: 722,86 SAIION NAME: VAv NUYS CA P Q.O'I OF '10OD: 77-9f 4CPJTH: JULl HOUPS(LSTI: CCI El S VISIBILITY IN STATUTE MILE' IN ( IE GE 7 F E GE GO 6E GO GE G E G F G L G E G FELT I 1C b /2 1 1/4 1 /94 16 b/i 1/? 1/ U.....,....,,,.....,..,,....,....,....,., ,..... NO CEIL y1.3 q ' GE GE 183UO ? GE A 92.a GE 1900) 94.N RN '.' 91, b7 L;E 120onl ? , 97.b b b 9 SE 1060) 9N q P UE q'.9 9A.9 9B E.9 GE Bru0) A q.9 9n.q Q q LE b Q R E N.N R ,F SO03) o P GE N.N ? U E 900) ) Q GE 3; , 99.2 Q E 3900) GE 2 00) ) q GE -001) y GE J ;,E 1500) > , D7.0 LE " I1c Ic1.0 10o.0 1O.0 ID.O GE 100I o.U o U GE 9u) I00.) Ifu.O o0 GE ? nn , GE 700) A U 1O. O ri.0 c be J 17, GE c OO ) 88? I. 1( '0 1O.0 I j E 90r) j ICoO.( o IO GE ).9 1o lon ICO0.o GE ? J On GE L GE '... 7) _I J. 100.,I IC TOTAL NUMBER OF OSEV8A313NS: 930 0

174 GLOBAL CLIMATOLOGY BRANC' PERCENTAGE FRQ0 ENcY OF OCCURRENCE OF CEILING VFRSUS VISIBILITY USAFETAC FROM OU9LY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER STATION NAME: VIN NUYS CA P71q10 OF RECORD: MONTH: JUL HOURSILSTI: C ILING VISIBILITY IN STATUTE MILES IN I G GE 5E GE GE G- GE G GL GE GE GE GE GE CE LE FEET 10 b If 1 1t2 1 1/4 1 9/4 5IB 2 1/i6 1/ , ,..*,*.... **,,,.,.*,*...,*.,...,,. *,., *.,..... **.,....,......, NO CEIL I IC 20)CC J 9S.3 Q5,a GE I quo q S j GE , D G E WOO , , GE 12nonl ?4.. r,1e b q, G E n J 9o , qi. GE 8-00I s q.l I GE , y q GE b6o be I GE ! ue b Q GE 390u GE 300u I GE 2,5oni 90.u ' GE 2C , Q g9.7 GE be A, q9.9 G o0. I CO.a lo "1.n I j GE CO.1 IW oo j.0 E 90m U n G 10) O E ic l lo.q L GE I ) Ira.Q] In.o o.0 I C.0 G I 10. IC I0.O n n J GE Po I0o O.a oin U E (13,3 j0i., f r n I UE 3or AI p Iln IC o ,E 7 U2C ) I.0o O l.0 GE 10r 9n ,j I O. a IUO.o Io I : GE ni )) ) O I C L_ 101AL NUMP(P OF OMIFRVAI IONS: o10

175 GLOBAL CLIMATOLOGY a 0 ANCP usafitac AIR WEATHER SERWICE/MAC PERCENTAGE FR:-QUENCY OF OCCJR9ENCE OF CEILING Vf RLS VI.IBILITY FROM HOU:LY OBSERVATIONS STATION NUMPLR: STATION NAME: V9 NUYS CA PERIOL Or 1CORD: nNTH: JUL HOUPS(ILSTI: C E L I JIG... V S 0 8 ItI Y I N S T 930TI i M IL E IN I GE GE G- GE G- GE GE r. E. 21 IL I1 04 FEET I I b /4 1 /4 5/p 1/? /16, 1/- N0 CElL I ' '.Q ,-.9 UC 2E S '.6 9. t '*. 9, G[ b 9 I (I qi.t 93., 9. 6,5 1.t 4.F 1,000i 8': b b 93.b h 9.6 b 93;: 1.1,.6 6.: I.F 14o (; J.2 7. (,E I2to b ' , , ' ' I.E 9c000[ o *3 97* GE B, '7)7 ' ' a 7UCI r, a G C T T G E S01D ' E 4, 66 6 c G E T ( 3I Q f 6, 3j ( Q GT sun i ' I.E 27u2O , ' ' Gr 1C a p u I se ? ' r 'q q g E b E, GEf Poo : : )U3:0 100 :0 100:0 10.:0 10:0 I :0 1no0 100.)0 10.0? : , 74L~I a 3, p'.7 n'' ff f ? J I100. ' 1I IC.0 1G0.0n I r).1 I o ii TLl O c I 0 1O. 0,u O o c to0. 0 1O.O 17l l. 1O.D li 8O 8.. D ,O. I'C.0 O o 0 I 0]. 0 U 13U. L :O 0O]. 100:0 OO. 1 C] ]. 0. I0O.O,r, I0.' I ,3 I T F I D0O I10.0 F, Al ? ].; I {(. a I0on.0 1O0. 0 1:30.0 I n 1 '10.O U Od A L NL-Qf P O r ORSf 'VA TI),,S : 719

176 GLOAL CLIMATOLOGY BRANCH LIsAF E T[AC AIR WLATHER SERVICE/MAL PFHCENIAGE Fr:OUENCY OF OCCURRENCE OF CEILING VFRSUS visibility FROM HOU9LY ObSERVATIONS STATION NUMBER: 7228R6 STATION NAME: VAN NU YS CA PEPIOL OF RECORD: MO8 TF-: JUL OURSILST : ALL ELILISOVISIAIEITY IN SIATUIL MILE IN G nr GF IE G E GE G: GE GE G L GE GE Gr GE GE GE GE FL[I I 10 6 S 4, 2 I /4 1 Y/N j/ /16 1/4 U o... o o... o N.0 CFlL I Ef.J uo ' P q6.7 t.f 18 D pa R ,P.7 q R8.? GE 1 'lli I PP A F I 1 ( f* P2.U p ( 91.6 QI b FE 12ooI f.7 mz z IO{UlI k T ' I.F 9ClCj R ! q' c fir 831 )( F.4 8S I b 93.6 q3.6 99T b [F 1I0o ; ' T of tl/ qi H '.? " I,cl F'6,.4 H.9 84.d !, I.E 4tr.6 p.c , ,7 q1.1 6 E ' L I L, 8.9 q (IE c r I ft. 84.1, 89.; I. f 07I f6. A 4.I ). 8.2 I.i ' G f 5 '3 7,6.6 R4. 83.I o rc 6.8 4' q " os.2 96) b S S '. P $ f I%3I 66.Q ' D Qb.U 9b Q6. f 12U 1f 66.9q , b.7,1 1LOLI , o ' R , I. f qj 6T.p e f ;9. 0 go, Q u.f U 9) 67. '6.S Q G F 602C 67.3n 96.S 91i Q9.8 I.E 80) S *99.9 9,o kf 101).1 9S io.0 13aP Po E 2o7n o n O (IF 1( O.0 10(,.fl 1o.o E C 86. s luo.( o ,.... +,.,,..,..., , oo, ,..,,....,....,+...,,..,.., TOTAL NM'E6P OF OSRVAT IjNS: 559

177 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FREQUENCY of OCCJPRENCE OF CTILIN v.'i VT.IbILITY USAFETAC FROM OUILT 78SEPWATTONS AIR WEATHER SERVICE/MAC STATION NUMBER: STAT ION NAME: VAN NU S CA It'I-[ 7F.IEC : "'NIl: AU3. 62UPS1L6T1 I-16 CE1ILING AISIPILITT 14 STAJTrT Mlii', I ri GE GE GE GE GE G- GE G GEL E 'I 6 GL F c L if FEET I /2 I I/4 I "I", i' 1/ '/16 I/4....,,,.,,*,,,*,,,.* *.*.,, o,,,,,.,, *....,* NO CEIL b ,0( ,3 67.T GE S b (,. 3 b7.3 fe 16201o (,.3 GE irdo3 39." l G6.1 GE 12rlG c :: ' ue Q U , GE O GE 8'00I 81.R ,.3 1.s GE A , (E A ? , E SO00 41.A GE 460G ' b P I GE 350l 1I I GE ,., S 76.6 GE 25, , , 6E j ? P., 7.Z GE 19C q I1 7.1 GE 15OC PI. 4..L , GE 100D S P AZ P7.1 GE I0O AS j GF QO As R b.4 GE 61OO Z z , '3.7 (I 7O P I.q 91.8 QIA GE 6CO , S ' GF 67C a e A 9V.8 96., I. A GE 47f I.Q r, GE q8.- 9R. :,, ul ouoi q ' 99., 99.6 '9- A.b 43.6 b GE IdOl R./ 9"., " A o D.( IOTAL NUMBED OF O8SERVATI3NS: 720 do. -

178 GLOBAL CLIMATOLOGY BRANCH usafettc AIR weatper SE8VICE/MAC PERCENTAGE FR-QUE4CY OF OCC'JRRLNLL OF CEFILING vrsus VISIBILI9T FROM HOUILY OBSERVATIONS STATION NUMPLR: STATION NAME: VAY NUYS CA PLqIou OF RECORO: MONTH: AUG HOU9S(LSOI: a IN IG E G F E IC G- GE G G E GE G E GE GE GE GL G E FEET I /4 1 3 f 4 5/8 1/2 5/16 1/4 NO CEIL b" F. 2600C e 6N.B , S. 3 65s S F , 6S , 6E f , 14 '] z ft IZ7,GC ? GE 10Os0I b ff 9r 01 r fe '.I ,1 t 770 q 36.a 5, F 6ulO 36.9 S ] ( L GE F b ,F 4 'u b ' ? b[ 1on v 1 i I , '.q f 3700$ b ,f i',o r? b.q E, '"I 7.7o , ? Z ? ? 7b.2 I R L;l 77.A J V S o, F 12[ ) A if I., J b s I A ir R P f, q A s '4I., (.5 r j ? ' :.4,;.4 7 lull s7.') 62i. b4.s Q $ 3, '.5 95r *.5 35,.5 E (0, TH 57.9 k ') '5 4in 77.9q 60.6 b ) b '.,7[ 'JOl j S ,I o q , ; ,7 I4 l I 5P.0 6j.j O9.j 1 4.N 99.5 Q A 1, n q2.2 I S t ' I. : oo,......o.... oo....,....., '4 IOIAL NMR9 O9S' 0F RVAT NS 9

179 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FR8GUENCY OF OCCURRENCE OF CEILING VFRSUS VISIBILITY LSAFETAC FROM -OUJLY OBSER ATIONS AIR ELAYFlE SERVICE/MAC STATION NUMnEP: STATION NAME: VAN NUYS CA PE100 OF PECOPO: MOl.TH- 81~.~ I9HOUSIL(T: 390r CEILING VISIBILITY IN STATUTE MILE'; IN I GE GE SE GE GE G G[ G G E GE E T GE GE SE.F FEET I Ir I ; 2 1 1/8 1 'IA 5/8 112 /Ib I/4 C NO CEIL I :] ) GE 20n01 28.? AC I *o. I 6,R1 8.1 AI hc.1.i ue 18: b? ) :1.1 8i l 3 1 GE 16r P A1 8.I E14o Y ' ,E 12F01 3l O k.3 GE C A , GE 9-L0(1 31.P b B ue 8C hst ' 'f.5 GE T' 1 37? b P (I GE CC 01, S f b.6b G[ sc b 88.6 R b.b E 4' OI 12.2 t R ' c be 400c s b.7 8F P.T 9) F 3'.CI T. U GE pi , A GE 1' ] b3 89 A u E 2fjid P ai f 1, u 18Ipn 71,1.I T @ 91.R q I GE 1' UGr A4. ; A q.4.e 12;1 7'.? A I I"GI o'.8, Q o, I R9. - 9q. 9F q ' S, 8o71. I. 7 9.I I q " , 7: t O L' II 7 9.b ?.5 9q.5 9, ,1 0uo ' q-,. 'P.9 4? Q re 4cr, 1.9 l5,l Q " f 'oni I, q.b "0.U 10. Ii*O 1J3.D r.0'rl 3' s '1 I 8 8.b cl , D2.0 1C3.3 10C. 19J.0 f 1001 IT I '1 10Co.0 IC.o c0 0) a o I 1T.? 61.I T , ' C. 1o o , ,,, ,..... **....,......,.,...,... ".4i 140fAL NtMF P Of OFSF VA11342: 410 _

180 GLOBAL CLIMATOLOGY 4RANCH USAFE!AC AIR WrATiIEP SERVICE/MAC PERCENTAGE FREQUENCY OF OCCJR8[NCE OF CEILING VERSUS VISIBILITY FROM HOU4LY OBSERVATIONS SITON NUMPE: 72Z986 STAT ION NA4E: VAN NUYS CA PTr.IOU OF ECOO: Crf.lt : V:JS HOURSTLSTI: 120C-1400 CFE111N5 RISIBILITY IN STATUTE MILES IN I GE GE 3E 3E GE G G E G GL GE SL GE GE GE GE GE FEET I I L i /4 1 /4 SI/R o llq 0...,.....,...,.,,,...,,...,.,,.,,.,...,,,.....,,,.... *,,,,,....,,,,,, NO CEL I B AA.q F1.8 A.4 8R P be 2OO I BA b9.q GE S A B P P9.R 998 R GE 16nO Q 8 AR A A9.A A9.V R GE ! I GI 2C b q3q 9'.4 q '3.4 LE o1000 qq.t ! q G E , ! G U 8rUo 49.Q 79.5 d b (, 705L bg 60jUO g b GE Q 79.G q4.8 q q GE ? GE r.? E AcOt GE 0O0I 5o ? b.6 GE?Z c bo f b.9 GE ZGo g ' : 94. I CF I A.! i.f 1CI Q (E[ 170,3 1T R o G GE I0n SI. R 4.n g GF u ,r POl S.2 a1.c j ? o 'IF 7001 P.7 3.] 91., q GF 6UP , A Q GE grit 5I. p U 1 AI.? go, lo.0 13-D. IOO.U ln GE TuOl "1.? G O lon o3.U 8E8?OI SI.? P3.1, o o.0 I. 19O.O o po0.0 GF t0i ; 91.? o.0 10.G 10.a GE I '.2 3.L S o0.0 DOo ' LJM T.... [ or 08SEP88 :.....,...,....,,.,,..,,,. *,...,, *,,..., TTAL NIJMA 1,0 OF OSSERWA TIDNS; 73C

181 4 GLOdAL CLIMATOLOGY BRANC- PERCENTAGE FREQUENCY OF OCCURRENCE OF CEILIN VERSUS VISIBILITY USAFETAC FROM 80U9L9 OBSERVATTONS AIR wtathea SERVICE/MAC STATION NUM6EV: STATION NAME: VAN NUYS CA PLU1OO OF RECORD: MONT?-: AUG HOURSiLST: D CEILISO RISIRILITT IN STATATE MILES I ; Ec 3E G E GE G GE GE GE GE FE G L t GE ce GE FE(T I AC c S /N I /4 /8 /, /16 I1/ ,....., , NO CEIL I 60.l b P9.V q , R P C'C 00C00 71.I A ,0 9O ,.U ,0 92.c Et 1 SO GO b 92, '.] q.1 GE 16,r P C 9c n Q2.' 42, P2.0 9, ue 1N)U)O S , ' " GE , (" GE E.3 GE 9CUo q T " T ( 89TT b (.b Q Q ul 7(U GE , q b.b GE 300) '.6 " "6.6 96,6 96.6,E '.7 9h G E "u E 3600) b , 6 q I 7S N A k ",I %.1 Q *.I EF 2699) "8.5 9p ', Q.5 f, 200) u 9'." P b E I Or, A ,9 9 u p ke I1o '.2 q" Q E S. '5, S , 4"q' s s 9.5 q9. (10 2I,) 79, q s 99.5 S , Q9.9 9 s g ,6 r Q9['a) ' q9, F (7:) q E ,.? q9.6 90oS " "Q.6 I 6 4U] j ) )q.7 q q.7 Q9.7,. 5" Q *9f el '., q9.6 9q89 q 6,': 79.4 " J I. I-l.0 10) L , 2 I 76.6 ' 'f o 0.C ( I I 10. I G I 3.. l F 3 ' ) s q9.j h0..0 l0.0 IJl. ' 1 o. 0 IJ U F 'cl C " [, ' D IU0.O F IL1) 1?6 95? I 10IG o ) U I O.0 10J u I I6, I ri ) ".0 1, i.0 1' uo o......,,,...,...., , ,...,... TTAL NO."flO OF OP,'ARVA T1399: a

182 GLiPA L CLIMA OLOG9 )8NC PR8LNT654E fr-,u CY Of GCCJ89E CLE OF cel. IO V9L0 jsaet A8C rom HOULy 0 8,E[RV 8 a TION A418 WF *HER SFRV8CL/MAC, VI011IIY 5 TA10ON NUMMIFE: STr otio. 9AM : VA NuY C A '"C1O OF '0COR: 77-,1 PO"( X : 6MJ, "'JUQ~tL', ) b.-2df V [ LE L 4" V I IFIL ITY IN S A U f.. I I,E GE L 5 GE GE G S F 1 E ZF 05 GE FE L I I1 C, I 11 '/ / 1/2 '/16 1/4 U.,.,o o, o o CEIL I 2 82, ,7 p, 9. 7.! 08.1 p Q.7 q,.7 so r A , '.0 b,5 9'r E[ 183C '0.5 9r9,9 9' , E lbsnr, I (.5 9g Q (? (7.5 3g.5 <.., r1f 42 Ur.8 q ,c C ,f] D ' J U , , A S..", 94.8 " , GE 1030 C qs q a6qf 9l.9 f, 95.8 b fto..b 95.q 9,.8 9, 1,5 93U so , qs.8 95., A e99 9'. 90,, 95.' b,8 9t, 61 72U b5 96., , 8 95' G E 6(1( E.8 96,Q ,H 9, Q eo., 9G.4 90.F F50 1 C0 8.4 '' ' 97, '.' ) SF , ,0 91, ' " 01, ,{g oe (]8.4l 94.9 gs~ 9.7' O l (i# L ', g7, F S, q E.r g i ' , 97.8 " o 978!I[ ' % I C1 24 O b S ' CF, S3 97, 97,J '.: , 98.1 t,, o 86. I t9) r8, S ;.2 9:,' $ h ) ' 99.j , 99..' I b ' )3.4 99A. 99F q , I l 1" ' , :.0 19}, 9' T' , "9.4 9q, 9 f r91.5 9".'" , I7G04 '0 t,.] , If~ 9 q9) a q.6 C , Q 10. Q j, I 7 "q, q: 945 1q. 9.6 : (,F "I l 9~. F6. A q j i l' o 99. v s Sc A I q q r.n0i 8. 1 I Q b 109. yv (I.0I t,. 9.I t0. ~ t 1,1' b., 900.? 1:..' b' o o o...,...o..., NIMPE P OF *19',?N~ 9 (0j _ 1

183 GLObAL CLIMATOLOGY BRANCH PERCENTAGE FR8QUEN8 Y of OCCJROLNCE OF CEILIN VSUS VISIBILITY USAFET AC FROM HOURLY OBSERVATIONS AIR VEATFER SERVICE/MAL STATION NLUMPLP: STATION NAME: VAY NUYS CA r'ei00 OF qecord: MONTE. AUG HOURSILSTJ: 21L-230 CEILING VISIAILIT3 IN STATUTE MILES IN I GE G f GE G E G GE G G GE 1 L re L E EL GE FELT I t /2 1 1/4 1 3/4 5/8 1 /2 / 1 6 1/ , ,,..,, , N0 CEIL 69. F R6.1 b Pb I -. I be :Ln R7.1 P PT E j s l I 87.I ,:I I 7.I 7.3 GE A a a p7.1 P t O a n SE 12"OI 74. P, FJ ".9 9Ig.). GE ISSOO N 9;! ? ' L GE p3, ; ,3 3 GE 1>-nj ? 9j ' GE , os '.3 93, GE 5r oi '.? ' 501.S ' '3.3 9'.? G0I ' us T 0I ', '..; p , OU, i3:I " ' '.1 E 4 583) ' ' o.2 k q ' j j 9.1 q.1 GE T1.7 93,3 95., g S I r3l i4.l 7,.' ,, b r , l 93.0D 97. I T ,j , I"?lrJ 1, ")5,0.1o u.5 0?,% ' ',6 p O7.6 Lf u '.1 3 '11.7 S.I 91, R ' ' , Ei a5,3 81.; 9.,9 99." i JO )nj I 6.' 9 g T q P g 9:01,j 76.7t '05t. '8.? ? ljo c 1:, I S ' q: C.0 f il7, I ? ra0 10a y : 761 G :)F 15

184 GLOBAL CLIMATOLOGY 9RANCH PEACENIAG FREQUENCY OF OCCJRPENCL OF CEILING VEWSJS V1IBILITY USAFETAC FROM HOU7LY OBSERVAIIONS AIR d4ather SERVICE/MAC STATION NUMPER: STATION NAME: VAN NUY CA PERIOD OF RECDPD: 'TF: AUG koups(lsti: ALL CEILING ISI9ILITY IN STATUTE MILES IN I GE GE SE GE GE GE GE GE G' GE 5L 6 1 C GE ST LF FEET I I r T /1 7/4 5/ /16 1/4....,.o, *.oo ,.o.,,, oo... o,,,,......,..,,.....,... N O CLIL I R2., P9 7 q2.2 9?.? ? 9. GE 2Cn , "9.4 GECI8130( A A R 3.4 $3. 4 S'.4 S q LE 1 OU , P' R GF P93.4 P94.2 R AS6.4 H A.4 R96. Rb.4 P~ 96. q4>,. 4 $1.4 LE I 47.I I H I.F b ,).9 RR R GE 9a S q A r.s 6' 4009O ? P A9.2 A ue 7, l p ' ; '., GE I R q.3 H9.3 l,.3 GE ' b GE 45G3 S8.C g.4 a q 99.4, GE 49c09 59P, q Io , GE 3E CO 5,? b G ], G JE0OI J.S 93.9 q0.5.5 '4.5 E I B I I., SE Zo0I 59.9 P3.0 8-, z ,5 92,S f 1P091 5P,0 ' ;2.l GE I1: A U s44.9c ] 11E ,b 9,.6 ) Q9.6 4l.6 "S. (,F P.9 p p q6,b tb.6 GE Q 9 j.] d Q.1 97.I ') I I 1J. lf ICOI P T.,.9.R 1,E , j R Q4 * ) ,.4 (,F "L0i , P.f q q (,c q.S Q ,>, IC UDI s f9.b )6.3, Q b b CE %uol 59.9 A Q IT A 61 nc Q GE lol 5I q '3.E, if I, A.9 A ,9 Q ICU.j ,,, ,...,..., o o ,o....,,. 103L N9L4M9C OF 01SERVATI3NS: 5S32 C

185 ULOuAL CLIMATOLOGY BRAND- PLRCENIAGE FR- UENCY OF OCCJRENCE OE CEILI9G 8WUS VISIBILITY USAFETAC FROM OUIL3 OBSERVATION S AIR WEATf-ER SER8ICE/MAC STATION NUMPER: STATION NAME: VAN NUYS CA PERIOD OF RECOR0: MON TH: SE HOURSLSTI: CEI L1' AISILTY.N STATUTF MILS IN I G E GE SE GE G I GE G G L G 1 Gf 5E GE GE GE FEET I 1r T' /2 T 1/N 1 3/4 S/8 1/? /16 1/4 0 NO FEIL I T C b q UE q A GE I8COOI 39.C S S b GrF SE I , , GE 12, S S ' GE ! GE GE 8' ! F 7o b GE Se R f67. GE SE o s b GE 4', C , GE 40O3 4', ,: ,E 3'u j 4 4 6, ? F a joe b GE b GE IF CO 4h is b GE If R R.5 UE 120c u f ls i S E qu I Q f, q01 7, 7,8 8 S q g.? E 7 I ) u F Q GE 5L04 47.P , GE F 0qI , b GE ' ,.j r O Lii , f I T C S 99.5 (I Qq TOTAL.UM.E.,,. 49..o..., A T...,., 134S: 2...,,....., ,,,...,...,..,., TOTAL NUMFB Q OF o4srqvati34s: 21J5 f 3d

186 GLOBAL CLIMATOLOGY ERA NCH PERCENTAGE FR:QUENCY OF OCCJRRENCE OF CEILING VERSUS VISIBILITY L'SAFETAC FROM HOURLY OBSERVATIONS AIR WEATHER SERVICE/MAC STATION NUMBER: STATION NAME: VAN NUYS CA PLPIOD OF PECORD: MONTH: SEP HOUpSILSTI: IN RE OE G G G G E G G E G I GE GE rsa GTF I E GE L FEET I 1o I /4 1 '/4 5/8 1/2 9/16 1/4 G o..o o NO CEIL GE e c UE ? S GE S7.4 S GE 149Gl h , GE GE GE 9: j ? 61.2Z ' GE snoo I GE OGO I b ue GE SIOO b GE GE , GE GE 000l b b GE b GE GE GE 1, R R (E 12 l / I be A U,E R GE BUD 49.R I G E 0oI i GE 6C q SE 00I , b GF R GE (E , , ' if I , GE Q R TOTAL NUMAIT OF OSERVATIONS: 900

187 GLOBAL CLIMATOLOGY BRANCH USAFETAC AIR WEATI-ER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURRENCE OF CEILING VERSUS VISIBILITY FROM FOUqLY OASERVATIONS STATION NUMBER: 7?2886 STATION NAME: VAN NUTS CA PERIOD OF RECORD: MON TH: SEP HOURS(LSII: 090-Il o0 CEILING VISIBILITY IN STATUTE MILES EiINMLE IN GE GE IC GE GE GE GE GE GE GE GE GE GE GE GE GE FEET I /2 1 1/4 1 3/4 5/8 I/2 /I6 1/ ,......,...,,,...,......,...,,...,..,, ,...,,,.., ,......,, NO CEIL CE R b GE GE 6TOO GE 14C GE GA ue c ! I.I GE U GE B GE GE G SO ) J GE T36 be '7.a R 73.8 GE ,.A GE GE , S GE P GE ,E E GE I1o c S.G Qb.7 GE Q ol GE GE ' GE o GE I J.0 GE 4CO b O GE I0nO U.0 GE Ino GE I ID (E ni I00.0 1O TOTAL NUMBER OF OSSERVATI9NS:

188 GEOEAL CLIMATOLOGY BRANCH PERCENTAGE FR7QUE9CY OF OCCURRENCE OF CEILIVG VERS(IS VISIILITY Us9FETAC FROM HOU9LY OBSERVATIONS AIR weather SERVICE/MAC STATION NUMBER: 722R86 STATION NAME: VAN NUVS CA PERIOD OF RECORD: 77-8 MONT-: SEP OURSLST): 12O CEILING VISIRILIT IN STATUTE MILES IN I GE E SE GE GE GE GE G GE G E 0 G s E GE E &E FEET I N /4 5/8 1/2 9/16 1/ o......,.,.,...,,.....,.,......,..,.....,.,*..,.....,.,,., ,...*, ,.,..... NO CEIL 4 L b z.h GE , GE N , GE 16rOl Z Z T.? T4,2 GE 14' b GE GE q J RO.2 T ) GE 9O q3.2 AC i.2 GE 8n q1.1 GE Q SE GE GF n R GE GE 3' ? R P E qj te 2 0o ", ue G[ lo q b.7.E q.7 R T GE 1200u U A tie l001 I R 1.7 8q Q , G F 001o 5.9.T GE ) Gf FE 60l T GE 90) h p R E 4[10 l b, TO0 58, I00.0 O : I00. 0 I0.O G[ o o u.0 lo I F l I ) G E b ,03.0 1u,.0 9O.U E I. IN....T ,, ,.. *....,... I ()T AL N U M FIg P F 09S ER VA T 13N S 9J0

189 GLOBAL CLIMATOLOGV BRANCP PERCENTAGE FReQUENCY OF OCCURRENCE OF CEILING VERSLS VISIBILITY USAFET AC FRO M eou9ly OBSERVATIONS AIR EATHER SERVICL/MC STATION NUMBER: SIATION NAME: VAN NUYS CA PEPI00 OF PECORD: 7-86 MONTH: SEP HOUOS(LSTT: 1SjC-IIU3 CCILING VISIBILITT ON STATUTE'MILES IN I GE GE 3E GE GE GE GE GE G E GE EL GE GE GE re F FEET I n 6 5 N /4 1 /4 5/8 1/2 5/16 1/4 N0 CEIL b T GE R T GE 18 C R R R b , GE V.0 7R.O I 7. To.:: GE j 8( GE 12oOQI R VI.T 8i GE ! R3.9 43*9 q!.9!. GE 91OOl R S;.9 GE 8riOI 65. R , le P A h GE O U H4.6 94b GE A A I GE C q4. GE P q0.l I 0.1 9;.I GE GE Qs. I 90. I 5.1 GE t. GE GE ? q F GE b.7 GE D ' t.e R R 99.9 GE G GE S Q.9 q Y GE c q GF buo q'.q GE ( i Ir l D.. GF 4Ln s IL J, GE 7UO o. I107.7I 1)O GE I13.O P q GE o o.n I I I0.j Ir ) , I0.0 17lO.0 1( Ino. IU O T...S , TOTAL NUMBER OF 0PSERVa T 13S: 90 0

190 GLOdAL CLIMATOLOGY BIRANCF USAFETAC AIR WEAIFER SERVICE/MAC PERCENTAGE FRC2UENLY OF OCCJRRENCE OF CEILING VERSUS VISI3ILITY FOM H00LY OdSLRVAIOONS STA*O.N NUMBER; oiation NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: SEP HOURSILSTI: CE CI[N 9ISIBILITY 1N SIAIUIE MILES IN GE GE f GE GE DO GE OS GE GE G GE GE GE GL GE FEET I 1J b S /4 1 5/4 5/ /1 1/ o,... o......,.., , ,. NO CEIL SE 200o U a ke be 16O 65.6 lb (E Pi I GE q.4 O A b E 10O R A5.? SE 9( ! Z s E P : b b.2 SE d A A E b SE 5P V SE b E 4) J) a E louiu SE 307 n J E z qi b b be 2"f7I 81.3 ' a.F IP SE L5 IJ b.4 11 L IL 81.6 qs b LE l lbi S GE 9 i ' b g S' 0,1o b b L C T 7I SC A SE 5 1u u CE 8J! b c c b IO SF? ' U (IF IO al.r 96.u IJO uf b TOTAL NkEM88E Of OBSERVATIONS: 90

191 w4 GLOBAL CLIMATOL06Y branach u5aife AC AIR weather SERVICE/MAL PERCENTA5E FEQUENCY OF OCCJRENCE OF CEILING versus VISIBILITY FROM FIOURLY OuSLRVATIONS STATION NUMBER: 7228o6 STATION NAME: VAN NEY CA PLP1OD OF RECORD: MONTF: SEP HOLRS(LST: ,.. o... o.oo o. o.... o..... o...., ,,, ,,oo,, CEILING VISIBILITY IN STATUTE MILES IN I GL GE E GE GE G. GE GE GL GE GE GE GE GE GE GE FEET I0 t I /2 1 1/4 1 3/4 5/4 1/2 "/16 1/ o..o o. o...,o....,,,...,. o.....,...,...,...., N0 CElL I , j GE 2U GE 80b 4o bl I1)L0 6, GE 14ro , V IE h d T.t 8t., B. 3f ILur, 66.5 I b Z s5.2 te 9" I b GE 8950c , ! b b.1 i 7 'u0t 67.E P2.(, bu 00llj 6 7.f n6., b b.8 GE S.1 o., ue 4'9 1 b9.6 b3, j B ba.0 p f 4 [, ,4, ui IF 3SL p5. I 9.I ' I GE I 14 7' ') I 5.c1 7;? , v b ,.6 G1 2"-]G I ,It 11L 'E 1501n I ,6 96.b qbb b.6 ' F i' '4l ; b bl 1-1, ? t7 9, Y2.1., b t, if PUDj , ' b (IF 7 1)4 79.f '..4 gv, , I.E 4(,,( IE '{}I z r b b , 4j-) 74.8,i. E ? F, '2.h i b ) U01) If.,-" I ,.. 98.b O T.0.t I,I l 74.1, ",2.. L 98.b o0.4 jo (} J J -)I 714.t Iu0. 0 1LI TO ,:..7,4.....,,, , *o...,,..,,,....., TOTLt %UmPIR OF UbSf IVA II, 71 4

192 LOBAL CLIMAICLOUY.1kANCH PLHCENTAGE FR-QU[C4 Y OF OCCJRQENCE OF C1 ILINE, VERSuS VISIBILITY USAFETAC FROM I'OU4LY OdStRAATIONS AIR.[ATHER SCRVICL/MAL STATION NUMJLR : 7228b6 STATION NAME: VAN NUOYS CA PERIOD OF RECORD M0NTE: SEP OUIRS LSTI: ALL CIL INS 31S181 ITY IN STATUTr MILLS'' 1N GE LE se GE GE G- GE 6 GE GE SE G[ GE GE GE GE FELT I , 1I /2 1 1/ 4 1 1/4,/8 1/2 1/16 1/4 0..,o... o... o,..... o...,,,...o NO CEIL I4.b b I LE b2. 3 b LE , S S Ur jo8 00I bs GE 14100l ,E L6.6 b? S UE 1WOD SE 9COO UE 87P3O b. U i 77O b b, B Le b DO E E 0U b 7b LE 4 Do do E 4C a b be 35O P T b se 26, d , ( I 06L0 t s 93.5 Q GF 18F B E I 1, LO I J.3 a L) g te c 12 1, , SE ITOO b2 v6.2 SE 9001 b d b b (E 8 L,3 6I b b i E 7CTI b GF t d S U E ",0I d U z GE H1.I b Y E - UI 1, h a M GE b T7.] , (IE y E b CO.0 S..,.., ,, ,...,, * TOTAL NUMBER O F 06SE3VA(IINS: a.-

193 G,0 ULAVAL CLIMATOLJOY,RACF USAFETAC AIR ;EATFER SERAICE/RAC PERCENTAGE FR-QUENCY OF OCCJRRLNCE OF CEILIN. VERSUS VISIbILITY FROM HOU4LY T8SERVATIONS STATION NUM:LQ: 72296E STATION NAME: VAN NUVS CA PLIOU OF RECORO: 77-8b 6ONIH: OCt 8OURSILSTI: CE ilin. VISIBIL IT Y I N STATUTE MILES IN I GE 5E E 5 E SE GE GE 0 G L GE GE GE SE GE GE GE FELT 1. L /2 2 I 11/2 1 1/4 1 1/4 5/8 1/2 1/1 1/4 0,,,...,,...,...,,,.,oo.,,,.,...,.,.,,, ,,..... o...,,,,, , NO CIL ' u ! L' b.j 68.U ue 1b U be B t te 140Jd Z I be I l U f ILXGO bb b GE 90GO I 76.b b o b.6 be C2.9 6? ue 10dL b I.F 610L0 4P E so lr , Z ,E uc CT 3UOj , E S ,.L b I ul 2r i , O (E 2002) 49.2 b g 84.8 d4.8 4k.8.E Ilidl c b ut Io I s d be 12jo d ut l33 L I 1. 0.A 71.1 l ,f I L9 s.t.f 71.1 b GE m0 s I b B ,9 UE 7 il b7 84.J 88.A o ue n0n b ) (I ' ) f.. R B8. b G E L ,I b B ' E '1U I b E ,1.8 11I b ue 171!)) f., 71.1 b b a q L0 01 5(f I , F :.O..., F8...A TOTAL NUMBER Of OHSFRVATIJNS: I y7

194 GLOBAL CLIM AIOLLY R At.CF PEdCENTAGE F-.JULNCY Of OCCEIRENL OF CEILINo versub VISIBILITY LSAFETAC FROM HOU4LY OBSLVATIONS AI weather TRVIC/MAC STATION NUMHLR: STATION NAME; VAN NUY1 CA PEQIO OF RECaRD: 77-A6 MONi,: OCT HOURsILSTT: C...L "....V IS E..L...'...'..Lf:;... CE ILING, ATS I 1IEIT I I N ST A TUT f M ILLFS 5 IN I GE GL c GE GE 6: G G 6 GL E L G E GE GE GE GE FELT I 30 t / /4 1/ 4 5/ /lb 1/4 0.,, , ,,.....o,....,.o., ,,..,.. NO (EI I.,2.3 S ' '1. H ' "L 23UO ' N N b bb E llao[l 4b.' Sj S b. H b GE I16 "0 4f.5 ' Nj. NT.5 3.a 6N b a b. D GE 4 c '. ti L 66.A A 67., NO A I202Li 41.' S I ) 65.6 b.2 NN N A GE L3ItuOI 49.? ' t.i ( ub u *t 6I (7.o 6H u a ce 9-> 2 4q.2 0 i At )'1 I 49.7 o.5 t u TI j:}i 4 Y., TI. I la.l b o "' ', b b SC 1 4 t G b l 33.! L-) 5.7 I si.3, o, u 7, ti.. b< ' b 3I2). 6 Tu T ' <I I.' t.,1., d r.5 I. b I.. '.I [O.? J.3 k di '1.3 t b t U ',3 I 53.3 t P ' b d I'I J F7.6 a ul I '1.3 I I a s 8.y r, t I I I li '9.t I '(( '.9 'L.q 7. lb U.0 v ! I I, o.i.i bo.? ' ' z ,1 1 ' '.a b. I d Y L. L w A th h..3 d d f 4 Ll. P t I bb.3 b It'll ', t b., b ' a b.0 St,. I3.I 7d ?.3 94.I LoU ob I OT Ci 36.2 b.'. 3d.9 85.f s , ,.,., , Id1AL NUMI 0iP (F GOSI RVAfIJNS : 314 a--.

195 .LI)AL CLIMAI(L..9 LA Nh PEHCLNTAE Fi-WUENCY OF 0CCJWOENoLE OF C F INL uskl VISIb6IL ITY U SAFLTA FROM k 0L L Y t PV A TIONS A I R 3IAT SLWILL/MAC 7 1 ITATLON NU'Itt : b7 h ' AT 1ON NA4 E: VAN UYS CA P[R10U OF RECOR: -6t M2lrH: OCT HOURSILSII: S ,....., LT, I... L V]SIB161T 3 IN 01ATU [ MILLS IN I E OE G E GE G fe be.1 t 7 E4 5t -N OG FLL I 1" / /2 1 1/4 1 3/4 b5/ 1'? I 1/ 2 NJ CLIIL 4.6, 479, 14,z C,4. b5.6 6o ' ti ol.i 1.; L 4 u,1 173U32 L o ,t. 7:.6 /2.8 I' l*. l u.s OF , S.} ?i 'Nt ', ) ]{ 41. ' /0.4 b [J 1u {.t p ls.~. " 'I.1. 23','', , ],t, f~?b11 6. b 35 lt<. t,, 't~ I1 2'o o/ , i 'Tb. p 1 I ~:; 71 2, b I b r up '4.3 {, ,5 74.3j U7,S ', 'I.* II.', ; 4,'. [: I 47.3 ' IB ? 17.1 '., 2 -. I b.i 43. d.i 4 ' / l7.1 t..1 7.,; O I U' 4'. 1, : t, It b. I t u ' 1 14 ' " I '11 " ~.., '1' ,. 93. ' t"., 67."'1., b1.2 ',. 1 '37 ' '.1., 11<, S 2 4D. u 72.4 I 1 s I 91. ' '4". 2 1 ki.9' ~ It9.. ' I ' f ' ' ' t.0 W } "4, u,. #. ~ ~ ~ ~ 6 1.-I 3).. 13 ' '18.. ' > , 8. ' 3.b.? 4 3J, d~ 41. b.. 9s~ ', J~ 91. 4q ',.4. u' : I i'

196 u A I I'.. C/~'.4. o-a -',. A F W I I a L V4 Y2,, q8.' k4 V1S.48. I7.'oN I N 74U el -4t, 1'; 0C I H' DURS ( L : 2S -l , ,. I..... f I y,.. 2/ 50 u. Lt 1, 51,7 66 L( 4/i j *,& 4. 1/.' 1 1 / 'Jr ti0 1I2 /1, 1/ I *.., Cr', 1 I. ''. 4.,', I. II f , / L.2 1,4 14, /4. e1lb 7r. 7 n. - S.7 7 7t.? ,1 t. 1 4/,'...I, IL.f,6 b t.1 (I.4 ' tit Ib. I.b t,.? r. / 71, b.1 I.7,,2 1F t.4% 4. '. " 74.1 p 1. '. b..-.b. f. b V. b 6 S' i' +.+ "',. L+./ '1.>; v"+ "17.'. /2. c I+,. 0.+J -', h3.a 6'i eo.8 8,.8,' ' i 0. 77,', 4..+ 'I., i.4.. *? 6Z s , / S,,. / 77l S+..4 '1... I 4,,.! '.? :?.1 -.a a >.6, 1. t. c'. t,,*- 1.,, 4.2 l~ qo,'7 83. '.. 87,1 63.) +/ ,.!,, ',, i.5 '." '.) "1.3, * ' - /.','.. a. +* ,.7 6"., t',. 9% +.? b-7 S,+,,. 2'.. 4'., " '.' ".) 6 7 -t, 04, 7 4'6./ /6.? ",,4., '. 44.' ' ' b 9.S 44 5 '2-. ' ' ' 7.~ '47 7'. ' E. 4' '11.., 7',.. Il s, +8.8 /4-4, 4/ q "4., 56.1 ' ,,.t99 '.. 9/.1 '9.1 ' '7. '., , Y ,7 9q ' 4.7.? 'I ' '4b IV. ' 41.. q I., 11 +I - ;, 9 6, ". t, y 9, I ' y.4 9' g '/9.4 '4'. '. ",. "" ' L h t7.s ? )9,7. 9? Q.6 96.' I I" '1 I.69. S / q9.9 "9.9 V., Q ' b'., -. j4* 99* 5/ t 3g+.y.*J (" I)t, '7.[ UQ C J (. 0 J jt. J I O C,. J..., I. t ' r.' ",. '46.' r ' G ) i i) 10.0 I... ". 4 '7 : A 4.9'. q.9 4/v I ' 42' ', ',y.. '4+4 ' , 1'i.. C00, JD ' '... 1' ++.- '. I4.6.' t 9., 94, 99 o1'.,2 1 1? (2.3 j,., H '.H, 4.4' 7t.,, '4. 99.o 1''1U C I [1 133, i.2 I. '. S ] ' /4F 4 d1u 3 'f 471,ll

197 AD:AI 915L : UNCLASIFID H

198 M- 'Ll 2 IIIIf

199 GLOBAL CLIMATOLOGY branct- USAFETAC AIR WEATHER SE8VICL/MAC PERCENTAGE FRUENCY OF OCCURRENCE OF CEILING VERSUS VISIBILITY FROM HOULY O8SLRVATIONS STATION NUMBLR: STATION NAME: VA4 NUYS CA PERIO0 OF RECORD: 77-8 MONTH: OCT HOURSILST): CEILING... 1V3S0BILITN STATUTE MILES IN I GL GE 3E L G GE Gr GE Gr GL GE OL GE GL GE GE GE FEET 10 6 S /2 1 1/4 1 3/ /2 5/lb 1/4 0 NO CEIL S0.S 61.6 b GE ZOO D R GE b E , z GE L B & E 1GO0 S E6.3 ue 9 G01 S b.3 G E j b GE , S.? b.8 GE f R GE 5r GE 465, C b GE b.1 91.o GE b LF 2, CO GE 2GU0 b8.3 H4.2 i GE 18JO GE 15S GC t , GE I01i G( 9; E s GE B00[ b &E 700) q GE S IE '.)I GE 4uO7 6R GE GE S GC , ICO.O GE bi b IC AL NUMBER OF O[SERVAIIONS: 930

200 LOAL CLIMATOLOGY BRANCH USAFLEAC AIR weatiper SERYICE/MAC PERCENTAGE FREQUENCV OF occjrtence OF CEILING VERSUS VISIBILITY FROM H0ULY OSERVATTONS STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTI-: OCT HOURSILSTI: CEILING 8S18'1T1 V N STATt3TE MILES IN i CE GE GE GE GE G GL G GE GE GL GE GE GE GL GE FELT I / I 1/4 1 3/4 i./ /1b 1/ NO CEIL I GE bfn R UE 180UD h * ? GE 36b[ ts GE 14 rl 0 b , GE 17(0O1 b D j b b bc B b7.8 B i7.8 ue y d GE C 0001 b ] GE b.5 d LE b GE S s F 4501l I u U J GE d G GE o E b GE 250)0I s GE 2P GE 18UO t I IF 151UO b9.5 P GE j I GE J Q (E 9o GE GE S GE E A , tie GE R b o ICO GE P SF 1 A I b ( lo.0 SE B IUO ( IOC.0 TOTAL NUMBRE OF OBSFRVATIONS: 930

201 ulobal CLIMATOLOGY 3NANCH PVCEENTAGE FR-QUENCV OF OCCJRPENCE of CEILING VERSUS VISIBILITY usafetac FROM I,0uLN ObSERvA8IONS AIR WEATHER GER$ICE/MAC STATION NUMBLR: STAIION NAME; VAN NU5 CA PEIOL OF RECORO: MONT-: 0C rours(lst): LEiLING VISIBILITY IN STATUTE MILLS IN Iim GE 3 G GE E G GE G- GC GE GL GE GL GE GE GE FELT I 1C t N 3 2 1/ / /16 1/4 0.o. o o..o...,.,,,,, o.,o.. o, ,...,.....,,..,... N CElL I, bf C $ b LE 18CG j $ GE 16f001 5S.' $ d bg 14PUo N GE $ $ $ GE $ Z E GL 90U91 S $ GE GE q GE $ $7.5 GE 50OI $ GE ? 75.U d $ $8.9 AR.9 $ GE $, , GE 3' o GE 30C, a $ GE 2IUU I $ GE GE b GE 1SUO be 12U GE GE b GE $ $.$ GE d v GE ue IuO GE 4 5I n b GE I a 8l jgo GE? n GE F o0.o 100 GE.ji i, TOTAL...NUM8...E$. OF... 0.FGE T OTAL NUMBER OF OPSERVATIONS: 763

202 GLOBAL CLIMATOLOGY BRANCH PERCENTAGE FR- UCgCY OF OCCJRRENCE OF CEILING VERSUS VISIBILITY LSAFETAC FROM HOU4LY OdSERVAIIONS AIR WEATFER SERVICE/MAC STATION NUMBER: 7,2bbb STATION NAME: WAN NUV S CA PERIOD OF RECORD: MONTH: OCT HOURSILSII: ALL C... N "..... ISIAILITI INY SIATUTE MILES.. IN I GC GE 5E GE GE GE G G- GL GE GE G L GE GE GE GE FEET I 10 b / /4 5/ /16 1/4 0.,..,..,.,,...,.,....,., ,.,.., ,,,,o,,..,...,..,...,...,..,,.,.,,...,,...,,.,.,....,....,.... NO CELIL NA ? & U GE 20CUO b E b , GE i OO b b.2 NE Z I GE b? a S GE IUOUOI G b d b 81.b l.b 61.6 GF b b NE E 7CGO R U 82.n NC P b O2.4 be b GE 4, GE 4,, M G E 3' 0 j G E u b b E 2,U01 1;.7 14.b SE L.0( s GE 1930 k s b b b E I O oni b NE b S E ) I b b SL IO SE 82OI SF 7UI Q7.q 9R E 6 (o SE c2ot b b.6 GF d GE 301J B SE L b E SE )I bo. q 77.b ,b IOTAL NUMBER ff OBSERVATIONS: 5594

203 GLOBAL CLIMAIOLOuY RANCH PENCENTAGE FREGUENCY OF OCCJRRtECE OF CEILING VERSUS VISIBILITY LSAFLTAC FROM IOULLY OSERAATIONS AIR weat-er %ERvICE/MAC STATION NUMBL: 7?2466 STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: NOV HOURS(LSTI: 07)O~0500 CEILING SIBLIT IN STATUTE MILES"" IN 6 GE GE SE GE GE G GE GE GE GE GL GL G E ue GL GE FEET 4 10 b /2 11/4 1 31/4 i/ 1/2 4/ ' ' * NO CEIL A b GE 20C01 64.F b 77.L LE 180O b GE 16U0 64.h GE 140 n b GE 12EU0f F GE GE 400C U , GE 8 rjo ? G 70 U 0 bs.6 72.D b ue L G E 5l b.o A GE 4 i0! b 8n b0 472C o 7b n O oe c A L F 02UO b4.) N GE 2',[On 67.? 67b S.b 85.b b GE 2Co 69.c 8J.0 8T UE 140! 6Ib , UE 144,0 68.f, U (E 12u L GE 10!On 6P.0 Fu.) GE 967) $ GE PL0! 64.7 r E 700! A bf 6LCI o GE 400! 68.0 FD, GE 4I LE SUr! U B , GE 2Oj G6 1o! r G E I! d TOTAL NUM3fR OF O4SERVA T13N9 125

204 L 06AL CLIMATOLOY JANCO PERCENTAOl FWQUENLY OF UCCUVEwCL OF LFILINb VERSUS VISIBILITY USAFETAC hom OULLY Ou R8A8I ONS A[1.LAIH[ 1[RvIC1/MAC STAILON NUML8: 7Z276b SIAT ION NAME: VAN NUYS CA PER0 UF EC0D80: 77-V6 MO1TP: NOV HOUVSILSTI: ,o..,...., ,,..,.,....,...,.,...,.., o o...., ,......,... LEI 11 G " I r IN STA T1 f MI t f " I I r. OE 51 2 GE [ 6 0 _. GE 61 G G E. ( GE u1 FE T I In 4 i /2 1 1/4 1 '/4 /8 1/2 /16 1/4 C......, , o ,...., ,.o NO CCIL f b (A.6 b t bb.5 b6.6 66s L 66. bb.6 L, E 22C0uD Ib I L S -1 i 66. 6, C6A b1 b7 b. B.1 7 b60. 7 C. 7 b.?.8 bo.6 b[ L oc4-1 6b b8.7 6h.? P. L8.1 t bt4. 6o.8 G C locool 11.& L5.9 b A ca ba d te 14'39I 61.4 bb.2 u4.' I GE I1 "'l u.6 f, b 7, b B b , V c Q 4,. 7 b B , GE b T q ce 7r I 6.2 b GE 6.] t.6, J T L. 5C 0 I o. LE.1jI 6U, 7-,7 7?.: b.8 7bo. 7b.9 7b ff ,7 1% lb , GE 3613 f b l. b u1 3r: 6 P J U j.5 0O.b 80.6 GE 2 L. 74.L 73., 7d.4 eo W b E[ 2(,,31 6o.4 l.j 7: ' A s 6.5 GE IJ021 b.4 7b b b te ' b8.3 R8.6 3P.6 88.b b d9.7 8y.7 UE C.4 1I.1 ' b I b O.b ' Eflonl Ic S B D 2.3 * ue 9 ; I r 8j ti o1? d y T.V 93.0 V. q Sr b? b L t EI.A 84.b S GE OIj u L ' Ob.0 96.U o t 1) C b b. 9. GE o b.9 44.b Lf Io 7] o b y Y40 q , SE -1 71t bi.1 R4A NU~ 909( 0F kvai K 6

205 GLobAL CLTHAIOLOLY 3RAN(F PEoCENLAGI frk:u60 %C( Of 000(J36RL9.' OF TII IG VFE63LS VIS 1I1LIIr USAFETAC FROM HOULv O,57OVAT1ON3 AIf 8[ATR 5FRv1(L/MAL SIATION NURL 9: 7,2 66 STATION NAME: VA NTS LA PLP090 OF RECORO: MONTH: NOV HOURSILST); IN 06 OL E E G -Et 6 G C6 GE GE GE GE ue GL be FELT In /4 1 3/4 i /16 1/4 0,...,....,,..,,, ,... o , , ,....,,o NO ULIE I 55.H d b.6 6G 2E3'OI bc u N N GE L.7 bb. 7 r N f 16 C u.? 61i T GE INcl ft Z. 9 ( S I U I2r)co1 6T N E I 0D1 65.T N R.3 do.1 a0.1 L E 90u01 t I. 3 t. y T b P0.0 do u E COn e J u F I If J L[ ' 7.?.? L 5 boc'i u U t 4 Uf t, d b c 4 - 'I I s.3 78.t u E 3,1 f 64.6,l , ,.0 471) 6".' bo3.9 P N u ; b b b.b 86.b EL I o) tr.' I5.7 b I b o ue I [) di.b a b I I1%(]) l.') 78.u T , r L d g ul I b Er d? ue 8' d? b.0 96., b LF. 703) L b ? I,7 t 9.3! In.? b.b b ' cqi /,4 86.b ufl 6. I 7t.9 di q b j t 001 bg.3 78b v p LE d (It 1 : ,' I q ( II b.1 7 b ) o.0 TOTAL N MHEW OF 07S4VATI3NS: 920

206 GLUoAL CLIMAILOLVY PRANCU PERCENTAGf frequency of OCCJRPEILC OF CEILING VERSUS VISIBILITY r USAFEIAC FROM HOU7LY O-St-RVATIONS A19 weat-er SLUVICE/AE STAT1ON NLMIJLR: STATION NAME: VAN NUYS CA PEQIO OF RECORD: MONTh: NOV FOURS(LSTI: CEILING ""AISI6ILIT 9 IN SIAIUTE MILES IN I GE 01 2E Er Gr 02 GE GE GL GE CL GE GE GE GE GE FEl I f. 5 i 3 z /2 1 1/4 1 /4 i /A 1/2 5/16 1/ , I.,...,.., NO CEIL 1 S 1.I 13.6 tl U bb.9 bb.9 GE 2CO 6, C IE I80] ! fe I6 f,0j u N , GE a d A GE 12232! : b LE Ib;uOl O.8.. GE 9CO GE b do O.c of j 7.3 7, b c GL 60U1 b , I I I oe 50UC bo o t LE 130do GC 3900! ? U.F 32D oe 2600O b ! c GE 2; s.3 f v GE ,.7 89.j GE q be j. b) G0 902! ao of 1o 1 7T.C 94.u IE U d b GE I j GE SOI 7 1. I LC 4 ;C 73.1 H4.1 d , Of C IO loo0, 1[ r -o P4.I " j E I O I S O IO u[ CI Ioo O os ,..,... ** , TOTAL NUMPJ R OF O;,5f RV4TI)N%. 9JO

207 GLOBAL CLIMAITOLLY tranch PECENTISE FREOUENCY OF OCCJRP0NL of CE1LINS VERSUS VISIBILITY USAFTAC FROM F-OUlLY 0SFRVATTONS AIR E AT HER SERVICE/MAC STATION NUM8R STATION NAME; VAN NLS CA PRIO OF RECORD: 77-b6 MONi-: NO8 HOURSILST): 15DG-170) CEIL INS 81S1 IN STAJTUF AITT MILES IN 53L 6f SE GE GE GE 6 F G5 GL SE GL G G SE G GE FELl I /2 1 1/ i/b 1/ 1 1 1/4 / 0,.,...,,.,.,...,...,, , ,....,,,....,...,,.,....,,,,.....,,..., NT CLIL I 5S t b b LE 20CDJG 62.3 t9.4 1).b a TS.b b 7S.b 35.b L1 180DO b.3 L b 73.j ,.6 7S.6 L 16r C , b GE IFPT m.7 b[ 121P d l d).i C.I UE b , a2.o ca. 82.u D GE 92o0I t R2.C p2.0 E 8r GOI tl d e.7 S[ S.q R3.2 E tligol b b G E SPOrl DoI 9s. 6 76,.6b P I G 94 I b S.3 8b ,.3 SE 4CJ1 7L.8P , L ut 300U b.b D 89.0 o U 89. f] n I SE 2',LO LE 2 E1I 76.3 p7.2' , b b.8 SC 19U pt.3 9] o j C 8f I1LU ).L bf 1. 01?b. /I b..E IPufr 76,.9 d8.0 1.) b G L 90I 7b R b b 96.b b be ROG A L A b.0 SI 7JU c ce h E ' As u. SE 400I 7b I E hllo O I.E JI I, SE IJ "o.k Z u1 1oo ,E r I T OT U.M.R.,..M.R OF : TOTAL NUMBLk OF UfkS L W A 13 N S 9J10

208 tkol0al CLIMATOLOGY 8RAN Lf LSAFETAC AIR.EATFTER S[RVICE/MAC PERCENTAGE FREIUENCY OF OCCJRRENLC OF CEILING veksus V1ISIBILITY FROM HOULY OBSLRVAIIONS STATION NUMBER: b STAIION NAME: VAN NUYS CA PC'IOD OF RECORD: 77-8f, MONTH: NOV HOURSILST): IB00-Z]O0 CE G VISIILIT Y IN SIATUTE MILES IN GL GE G F OF Gr OF E G 9 GL G E G G L GE GSE OE FE El I t / /4 1 7/ /2 /1 b 1/4 0 NO CLEIL A b R 72.8 G E 1AOO d b.4 G E Ib , SE (.R b b f A AI LE 12'LI b ? F 11fuO 8C.2 1b.3 4) b , 84.A 84. is 84 A u 1 9c,,O IC ) R P E 8-L(C, t R.3 74.b, ) B B5.0 BE C b b b.i 9.I p5. 1 o.1 es.i 08 b2' o s GE 6F e B' E 4: tl tq b b b uf 9-urlI 7f ] b E 3' Li J b Be k, 'D h " t "LJ ,91 Isb ? 93.b kf Z.1, , v F 18r}i f 15U0 l if c F I1n1On 74.6 h R ue b 9b Gr P.O ' J 9Q ,1. 7U t GE ',U ?.! b b b b GL 4 j Q bl 30Ol F b JO On Of IGO I Y.8 95.J l ( 100.o BE t C TOAL NUMBER Of OBSENVTIDNS: 900

209 LOAAL CLIMAIOLOGY,RANCH PERCENTAGE FP-. UENCY OF UCE JPQLNCE OF CFILIN,. VFER-uS VIS1bILITY LSAfLTAC FROM FOU4LY (,ds t V AFt) N, AIR WEATtEP SE881CL/MA. STAION NUMBL: STATION NAME: VAN NuYS CA PRIO OF RECOO: MONTH: NOV HOURSILSII: 211C-2303 ElLI V46S 1IL IT9Y I N I A8IU I MI LE S IN I FL G SE 6E GE 6- GE G- G SF GL GE Sc GE SE.E FELT I / /4 1 3/4 5/ /18 I/V ,,...,..o ,,... NO CLIL 1 6C, I @ 7t , UT.?ut.Oj b t 18-03J0k 6t' , ,8 GE I 3cj ,, 79.tb ,. 79, E 19> , L , b jl 6E o , d S 81.5 b1.i.i,. I, Gc , b 83 8I ,. 83.1{ 31.2,E GE o[. I S 71,. 79, ' b LE u p I uoj p p GE 52GD / q G; 9'UfI IS." p5.d GE 3 L , n, U j j)i b.9 e1.j L.9, S 3:o - fg " 70.5 d * b GE 2%mI J g.o SC 2 b9il 69.: ul 1 I i t9.6 m8.b I 9. ni b.0 SE l2uoj , u GE I. P : t U E , g F nocl d :lI 69.8 I.9 S , SE 6,.0l F9. k SI , E t A uf 9I t 1 (, b 2Pj I9.F q Lt L11 69., 1.9 9, f, ([ II di L TOTAL NUMFIE R Of OFiS1RVA fj)ns: 89.

210 4 Ik r- ULOL AL CLI"A I L Y PNCF PE6CENTA&S fr -JUE4. OF SCCJ PE ICE OF CfILlI';, 1F SL vi1filii U'AFE AC FROM h-ou4ly O611LQ VATIUNS AIk hfathf8 SERYvICE/AC STATION NUMP HF : 7 2?.6,AIIOs N NAE: VAN NuYS CA PLIO01 F RECORD: 77-b6 MONT- : NOV -OU (s(lst): ALL tlno S TAT UTEr MILES 11 I L CL G- 13 Gt GE L! S L L TI 6F uf GE SE GE SE FELT I I t /4 1 3/4 /6 1/2 / b 1/4 0.., ,.....,....o..., NI C ll S.., tl 65.6, (L r.(1 73. L C Lt LLSCO 62.4 t, Ut 1830Cf 2.4 0h , , SE 16tO t c1, b, b SE 14!'0 b4. 1' b F {C 121.C b L 70, v.] I C s b b ).a 6 r A. 9GtO b b bn.h b a F b' i I bc, ul f P u,[ 7.,- I, S 7 2P. 7, , ]. 1.3 I L I G) b.! K I I F ' ? ? [ ', ' C r , U b be 31.P7 I84 7l b b '.C %. 0 ds.3 E 4 3"7 64., 7G1, b I :b =[r: C at ,.7 p ; b I 1 P- u I. 7 t,.i y a A Ir, rs.3 8b ] l 1L" 1. 2.o a,.5 89.b d h 1 I , b.S 96. 9u.5 9f.5.5 S, E ",7 7 1 "Z.o h , 44.b , ,.7 o1 & I 72.3 c., if ' E 7, 12, '. 1T.1 9J Y C F , t F 12. 2,3 d ] c.5 -A I, "t5 9j Z C '2.5, s EF,u1' n 3 94., L ILrI 72.7, b q.2) y ce st.3 93.b , , a 7O7AL NUMHEF OF 578VATI3NS: 5423 al

211 GLOBAL CLIMATOLOLY 9ANC USAFLIAC AIR WEATI-ER E RVIICLrAE PERCENTAGE FREOUENC9 OF GCCUJAENZE OF CEILIjO VERSUS VIOIBILITY FROM HOULY OOSLR9ATTONS STATION NUBLP: 722Rb STATION NAME; VA4 NUYS CA PERIOu Of RECORD: 77-6 MONIf : GEC HOCRSILSI: C] CEILI V 9ISIAILITY IN STATUTE MILES IN i 66 GE 5 - GE GE G GL GO GL GE GL GE. E L 6 GE FELT / /2 Al/1 1 /4 5/8 1/2 S/16 1/ *...,...,..,,,...,... ** *..., , NO CEIL I S( b b,.7 b1.8 GE (] B C9.6 b9.6 69, , b9.6 6y.7 GE c9.s ! b t GE t, , u9.6 b.7 GE 140rD GE T.5 t,7. t, S b.. GE CiCO I cb Z A S GE 9UUO j b H.3 7b.5 GE b b GE Y.4 GE 600!O b G E 5LIO 67.? b ', P1.L l uf u q GE I G b E 25U0! J S. 9ao GE L r GE 18OO b b GE GE 1201, 7[, , U.s GE o GE o GE buc b Y GE I H , GE q3, , oe ro oi Q4,b ue J b ,.b GE '0l! a L R 9b GE 200! 70, GE 160! o,1 A3.7 89, b GE 0! , b T M.E... E O..F E ,......,......,* * TOTAL NUMBER Of OPL'SRVA TIONS; 9 :

212 ULOvAL CLIMAIOLOY ER ANCH PERCENTAGE 3k UE4CY Of UCCJ6 0 ENLf OF LtILING VERSuS, VISIBILITY USAFETAC FkOM HOUALV OoSt R AIIONS AIRM JATl-CRP SE RV ICE /MAC S3AT1ON NUN ER: 7,?2b26 STATION NAME: VAN NLYS CA P7(800 cf 8LLORD: 77-8 ONT: DEC )OURSI L STI: 39[ CEILING VISIFILIIY IN SAlIUf M ILES IN, a UE Sf it. GE- E Gr GE E 1 t E t &f A GE GE 6f FEE I I e / /2 1 1/4 1 /. 516 If? SlI b 1/4 C.... oo...,.o o,..o..,o ,......, NO CEIL S b b t t3. b b3.4 E 2.00u01 5H o r ,C l t6e. 3 3.' r D. 4 7,,.5 GE L1b , u J LE joo f,5.9 o b t u.b UE u b T o IV oi A a b 6t3. 81l A h GIo bs.1 1/ g b do c. I Il GE 8i 5O t , dc A1.2 o b ol.7 L I 772 r, ?.b AC ,.4 H AI GE 6 oli ? O3.6 a b p GE I QOCI , pl.b b 8.80.,c 8.) 83.0J b 3Z S 400W ' d4.2 f'.? b L 4 ',C I tf u 82.b 83.0 A Ak b LE 3 0(t , s G').? j a, b.0 8b t.1 it 255l) b GE 'diuc P9.1 8q b,.4 U 1 I 7.. i GE I1,P b., *0.z 92.? 90.Z 9a E 12C) 7! b GE I I.t , GE 9.fl A.? 8.S F k 948 q5, GF S II S bb 9. 9t Aj jl I1.f 7b.5 bi z *5.4 Qb.3 9f,.6 96.b 96.?.? t.8 LC 5LC ! J ie a4,d ,.5, I b 9N. D b E U,I o.', s 92.; b1 I ' u E?I 71.b 7., S 92.5, a ' ln )31.6 i D S ul, 7I Z.o b ,S..E.A.V OF.. SE A....oI: o N9 TOTAL NUMBER Of Uf!SERVATj3NS: 930

213 GLOBAL CLIMAIOLOLY 88ANCF usafeiac AIR WFATIER S[RVICL/IAC PENCENTAGE FR-QUENCY OF OCCJRRENCE OF CEILING VERSUS VISIBILITY FROM HOUTLY OdSLRVATTONS STATION NUPrER: A6tt N AME: VAN NUYS CA PERIOD OF RECORD: MONTH: DEC HOU9SILSTI: CEILING VISIHILITY IN STATUTE MILES IN I GL GE 5f1 GE GE G- GE GG GL GE GE GE GE GE GE GE FELl I 1 p U /2 1 1/4 1 3/4 5/ /16 1/4 0 NO CEIL I Sb.? ? O 65.2 b bs be O00 1 5U b se ICDO c4.t GE I b LE 140oo & LE E3.5 7.c o ue 1C, b , b.5 GE 9SDO U.6 72., b6.S ul 6 D0O 66 c * u E 70D u E t) I.E , n L t , R L U.E u a se P, GE "0o0 69.q s S2C1 6Q j 82.5 R S LE 22 U b ie o (,E 1,0', t fe I?U 7,4 7t,.9 b L S u.e I CO l o IE S IE 60I GE 7ol b le 6c" E uod I b ue ji GE '00i l L GE il i.e IIdo d be TOTAL NUMBER OF OLISERVTIONS: z2

214 GLObAL CLIM413OLOGT BRANCH USAFETAC AIR weather SERvICE/MAC PERCENTAGE FROQUENCY OF OCCJRPENFE OF El1LING VFRSU' VISIBILITY FROM HOURLY OBSERVATIONS STATION NUMBER: STATION NAME: VAN NLYS C A r71:01 OF PCORD: MONT-! DEC aoursilsti: 1? EILING VISIBILIT Y IN STATUTE MILES IN I GE GE 5E GE GE G- GE G- GE GE I Gt G E 3E GL Of FEET T 2 1t /4 1 7/{ i /8 1/2 1/16 1/4 6 NO CElL I L b1.4 b1.6 GE ZO0CO bs GE GE p t, E b9.6 71, b E 12D T n.3 97.*, be , GE ( I 3E P T L,.2 GE , P T GE s I 83. R8 81.P A3.( (,E P5.4 8' R5.4 8S GE q S P b. GE P.0') U S Ob.S t., qb.b GE 3S l.1 85.I N R7.5 qt. be A4.S ; , G. 2S p G q T '.7 93I G E: T b q, ' R F T , , , GE m s s.9 9'.9 9S.9 GE GE GE b UE ' A GE a E S G1E s S , 9S E f to.0 1o I"O G l9t G s ,6 9S lo.n GE 0I , or.0 1O TOTAL NUM@ER OF OSERVAIL3NS: 970

215 GLObAL CLIMATOLOGY BRANCH USAFETAC AIR WEATHER SERVICE/MAC PERCENTAGE FR7QUENCY OF OCCJRRENCE OF CEILING VERSUS VISIBILITY FROM HOURLY OBSERVATIONS STATION NUMFEP: STATION NAME: VAN NUYS CA PE OTO OF RECORD: nNTH: OLC HOURS(LSTI: I CEILING VISIBILOITY IN STATUTE MILES IN N GE GE F E GE GE G- GE GE GE GE SE L [ GE (E GC E E FEET I 10 b I2 1 1/4 1 '/4 /8 1/ 5/16 1/4 C... NO CEIL I 5r b Z ,.8 be 00 r, GE , GE q we L4 OO Z GE 12qGO1 62., br %'" R(.6 R.6 4 u P,;b GE lonuol b b P3.7 LE ? "OCI T , A ? GE 7O I GE 6"G0I b GfA SOCO RS.4 a c S GA b I? S P A , E 4J s p b,8 6t c-i 66.0o 76. "1, ,6 8b F l 76. ) * , f 2t O n UG( F q be % r.C I.E I505 I1.I S S S sr I2GO $ T S q , 9G b.2 G( I ' 1 71, q Gf I ) ' q GE F1:TI GE 1 T Z.0 47.S GE &OI 71.7 P s t.q GE 5 GOf b GE 4Co ? - 9b q b 6f b loud.0 be 2Go 71.q o.3 1o ICO.O 13.0 GE Q0r U 6E O b t OAL NUMPEP OF ORSEA9A 7 ION%: 9q a

216 GLOBAL CLIMATOLOGY BRANCH PERCENAGE FVReUENCY OF OCCURRENCE OF C1ILlNf, VRSUS VISIBILITY USAFETAC FROM OL'LY OaSERVATIONS AIR WEATPER SERVICE/MAC STATION NUMBER: 722H86 STATION NAME: VAN NUYS CA ILEIO0 OF FCOD: MONTH: OL HOUPSILSTI: I8,7-?7O3 CEILING VISIBILITY IN SIIrI WILE9 IN I 7E GE 3E GE GE r7 GE GE GE G E GE GE GE GE GE GE FEEl I / 11/4 1 /4 /8 1/2 /16 1/4 C NO CEIL GE 200G GE GE GE 14C ".A V GE P q D. UE , q q U E V R3.9 8' I. p.' GE R.u GE ;' ' , P H 44.b GE I 6s C s.9 a, o5.9 GE ! P P q 17.8 G E V9a b B. GE F b J ,,2 " GE s GE q ,3.4 GF l.u GE Ia , 9S. 2 9S ". 99.? 1, GE FI J S ',, GE S.b q b. IE 1900 I S , , GE R u GF ? R ' q.2 98.Z GE 7lo1 70.q p GE C Z q q Q? GE )* , GE o. o OO. 07.J Z GE o.III 100.U lo GE l3o Io G n O 100.o a GE , O O OF SEV o... TOTAL NUMBER OF ORSERVA TI3NS 930 wmwm

217 GLOBAL CLIMATOLOGY BRANCF PERCENIAGE frcgue9cy OF OCCURRENCE OF CEILING VERSUS VISIBILITY USAFETAC FROM OU4LY OBSERVATIONS AIR WEATHER SERVICEI/MC STATION NUMBLR: $TATION NAME: VAN NUYS CA PErIOD OF PECOPD: M(NT : nfc HOURS(LSTI: CIIN VISIILI Y IN STATUTE MI LES IN I GE 3E 3E GE GE Gr SE G GE L E L b L G G GE L FEE S 2 1 / /9 1 1/4,/8 /l '/Ib 1/ 1 Nn CElL I ' GE b S 7 t. SE s. 76., S 71.5 GE , It.S 76.5 GE 14CO , S. q 0...A ,98 Gf m1.2 h ? 91.2 be IOOC ' A t3.t SE Az. 0 a I.1 01R T. 3 91s a9. 3 P s.3i GE '.9 A T GE P E boo %. S3 A 05.3 b SE O R ,.2 ' 'b A6.2 GE A, I a GE H7.b UE A9. ' 99.) ;. EC n9.7 A9,7 p ,F , ? , b 9c.6 9.t GF P F 1-W7l b D T , V b Sf R.I ') b E , , Y7.6 97,b b GE 9 U, R ' GE 8COI 6.' P LE 72I "1, A P GE 6( I ' ) ".0 98.n ) U,E SIA'I 69.3 q b 6, 6o0l 69.1 R.c R 99e F A R (I E P2.; S q9.9 1,F 20O1 68., P9.c q , b, 1I E ,t " UM,,,..*****,*..*,*****..0.,,,.,,**...0,,8.,o.,,,,,,o,,0,,o0o.,...I...NS TOTAL NUFFPtv OF OPSfRVATIONS: 92b

218 LOBAL CLIMATOLOGY 88ANC- PERCENTAGE fr-juenci OF OCCJRPENCE OF CFILI'u, V1 ESLS VISIBILITY USAFEIAC FROM HOU31 OaSfP9ATIONS AIR WEATHER SERVICE/MAC STATION NUM : STATION NAME: VA NUYS CA PIOD OF RECORD: Of,6TH: PEC HOURS LSI : ALL CVLING ISIILY IN STATUF MILES IN I GE GE OE GE GE G- GE GE GL GE rl G L GE GE GE 6E FEET I It? I2 I 1 /8 I/Z 5/16 1/4..., , , ,..,., NO CElIL I 51.P r-9.1 b %.9 6b f.e, b b6.1 GC zocoi 5, ; ' GE S ? G S? z J GE " P GE 2oo , GE , pi.? fe b ? R2.2 8, E 87O1 65. ' q , P2.. G F 3 b5: 65.4, : ,/ J b p E A r.e c GE 4 03I , LE 401Or P f, p b. be S A GE 1700n a. R E 25O q go Of 2GUoI GE , ' GF I;O A q E j s 94.5 GF 19l ; R R Q G(E 9U I1 9(' t, C P UP 7I S q Ob Gf , q h., GE,On GE ,.7 R GE ', ' F T q % 99.6 re tol Q GE ; , C q L NUMPER Of 0P68VAII3NS: 51 1

219 GLOBAL CLIMATOLOGY BRANCH USAFET AC AIR WEATHER SERVICE/MAC PERCENTAGE FREQUENCY OF OCCURRENCE OF CEILING VFRSUS VISIBILITY FROM HOUTLY OBSERVTITONS STATION NUMPER: STATION NAME: VAN NUTS CA PEQIOD OF RECOPD: 77-R7 MfNTl7 : ALL POURSILSTI: ALL CEILINGBIIlIY175AJTMLC IN I GE GE SE GE CE GE GE GE GE GE E G SE GE S G Sf FEET I N /2 11/4 1 '/ ; / /16 I/4 G......,..., ,...., , * PO CEIL I B (, 200U I N N z.0 F.E IRa3C b R Tz.C Ut 16T Q ?.T 72.D 72.Z 72.0 GE 14? ? , 7N ? TS.2 7. GE 12CO I 55.A N N B 75.4 E O00o01 56.q I T7.7 FE C0L ? F L, r 7 Oi ; ' A GE 67(T ? M q q f R 'i.S IE ? o Q.7 PE.? 42.7 S G 420n fa RI.7 GE f ? b b MT.? F!., k1 323 I ) B. RS.N p6.1.1! tf ? A9.1 6.? 98.2 B8.? So. 2 SR. 8.2,E 2" 0' ? 9U q1.? ,0 91, cc I s 9G , i. 1Vi01 6'.2 RJ t 9?.? ? u I I H b 97.' ) T 1'u7I s Q J (,7 9:Ti;I t,a. 4 A1.2 as.5 9., b 96.6 Sf Rc ri 6s.4 a 1.2 as. b f 7574 V.4 R b q j uh I S ,7 I bs.ci P65.1. a 7.9 9O.8 95.I 9b ? UL 4 GO 1 6U '4, f ulo 65.4 AI, s. j. 9 ' co g ' q If' 1 6' J "1 1 6'.4.7 S. 9_9 9.b , o.... o..

220 ULOSiAL CLIMA70OGYO BRANCH PFR CE4 TAGE FREQ UENCY (IF OC CURRE NCE 0F SVyy COnVE R USAFETAC FROM I"OIJLY OBSLRVATIONS AIR WEATHER SERVICE/MAC STATION NUMPER: 7,12886 ST AT ION NAME : VAN HERS CA PECPO10 OF RECORD: 7A97 MONTI-. JAN PER CEIITAGE FREQUCNCY OF TENTHS OF TOITAL SK Y COVI R HOURS I TOTAL tisilli U II 6 7 P 9 10 MEANi lot 03-0S 39.0 [l ) ? j 09-1 I S b.0. 5 q ? I ? lb )9 TOTALS I S TAIOVN NU M 9ER : 7?22R886 STATION NAME: VAN NUTS C A PFU.100 OF RECORD: MOTH: FEB PERCE4TAGE FREQUENCY OFE TECHNS OF 03OAE SKY CORER I-OURS I IESTI I f I S ME AN V Gr-V2 I TOTAL OhS CT3-US Lq- Il Is Is-IT ) ? a I T AES I Ts N.I '

221 GLOBAL CLIMATOLOGY BRANCH LSAFETAC AIR A[AT-PR SERVICE/MAC PERCEIAGE FREQULNCy OF OCCURRENCE OF SKY COVLR FROM HOUNLY OBSERRAIIONS STATION NUMTTER: 722R86 STATION NARE: VAN NUTS CA PE'IOD OF RECORD: 78-R7 MPNTH: -AR PERCE4 TAGE FREQUENCY OF TENTHS Or TOTAL SRY COVER FOURS I TOTAL ILST) I N A 9 13 MEAN OB.o**,,*,...,.*.,..,,...,..,,*o* *,,,,... *..,..,,o,... ** ,,,,.,.,.,,,......,...,,...,,. CP OS N.b 32.9 N nS T.R Z l ? 9t 1;-AN 21.4 I , ! IS-T I R TOTRES I T.9 0 1A.N g, %TATInN NUMMLR: 722R86 STATION NAME: RAN NUTS CA PEPIOD OF RECORO: 7q-8? MONTF-: APR ,,.,.,,,.,,,o......,,..,,...,...,,,.,,. o....,.....,,....., ,. PFRCEOIAGE FREQUENCY OF TENTHS OF TOTAL ISY COVER HOURS I TOTAL LST) 1 I S, 7 N 9 10 MEAN oes...,, *,,,, * *,,...,..., ,. *,,...o, ,,o I C;'-OS 4R.7 1P rR '6.N l N R16 00-Il 74.1 IF sbr 12-I I z 26.3 I.O 4. 94N 1S-I?.R R&9 1q-20.l ! I T.? 1P a20 TOTALS I!.2 9N R

222 flohal CLIMATOLOGY {VANCH USAFETAC AIR WEATHER SERVICE/MAC PERCETAGE FREQU'ENCY OF OCCL'RPELNCE OF 54y COVRT FROM HOUOLY OBStRViIONS SA1ION NUMFIR: STATION NAME: VAN NUYS CA Pkr loc OF RECORO: T11H: 'A9... ;..; ;,; ;";; I ;; Z";: ;,;... PEV CE93A5E FREQUENCY OF TENTHS OF TOTAL SKY COVER HOUS I T0!TL LST) I j0 "(A*4 Cl-S,....., o ,..... c3-o S f b l 30o S 1. 3 R , _ i I !.2 7;,t- TOTALS R St II STATION NtMEtq: 7729R86 STATION NAME: VAN NLYS CA PERIOD OF 4CORD: 77-R6 MONT-: jun PFRCE8TASE FREQUENCY OF TENTHS OF T01AL SKY COVER HOU0S I TOTAt I "(AM L of, ,.,... o ,,. o...o ,, o,...,..... o....., us L4,6-08i S 43,-9II 39.3 ' b.0 2.) TOTALS I S

223 SICHAL CLIMATOLOGY BRANCH PFRCELTAGE FREQUENCY OF UCCUROPCC OF f.,k y vrp USATEIAC FROM HOU7LY OBSLRVATIONS AIR weather SERVICE/MAC STATION NUMBER: 722SB6 STATION NAME: VAN NL YS CA L ]01 or ECJPO: 71-Ry 'NTH : JUL , I, ,...*... PERCEIUAE FREQUENCY OF TENTHS OF TfCTTL SKY C(OVLR HOURS I i 16. IEST I I I A 9 1? -ia. -..,,..,...,. *. *,....,,...,,, *..,,..,,,, *.,* *.... rc-02i DI-05 SVJ h L6-c8 S fla- I I S7.7 2S b.8 2,7 V 12- I 8 V.5 I qf m s ql 8-o Z ,.1-2 A S TOTALS I S.7 IF STATION NUMPER: ZZ t86 STATION NAME: VAN NUYS CA Fq3IOD OF RECORD: 7 7-Rb M ONTI4 : AUG ,,.,,., ,..., PERCEITAGE FREQJENC OF TENTHS OF TOTAL SKY COVIR FOURS I TO IA L (L. I I p N R i "LA4 (IrS....., ,,...o.,...*,,., *,...,,...,...,..., * ,-..., O-fl I 5T S n N.0 It.? b bb I-I I 64,7 1 R , 3. IS '.9, N. $.1.7 q T IA i T TS I I i

224 0 L10'.A LCIL I"A8I7L3C 1,yIA 4CH 4 C IIATA5E [ RET.ILNCT FIF OLCURR[5NE 2f Y4 0 V f AI C AC FROM HOL' LT OBSiRVATTO N S A T A ArJT' " 6alvrt/MAL A IITCrN N4U"PL4: TAT lo. 444[ VAIs NUYL CA AOI f[c CF LC3P: 1 '-5 F' N T 11 : P..., , PERCLqI A3E FgpEQL NCY OF TENTHS of TrITL S.. COlO 1-fl~u-S ILS I I ' 4 1 [A4 Qv! 11. f,5 4.o '. Q; IS-IT I J S Q TOTAl S I S F. I ",FAIION NLTFLO: I2.4H6 STAT1)N NAME: VA NUYS CA 'rl 1 01 O [C0O: NT: OCT PFCTATAGE FPEQJENCy of TENTHS OF 1017L W7 COVLR TOU- t TOTAL I ST I I A 8 Ic -(A 0.*......* ,......,. o... *.., ,, r,-cs I ' b-8 4l.U oq- I I 78.n ] ' I a I ) , ,? TO T F7.3 I 46ll r... II

225 GLOBAL CLIMATOLOGY BRANC USAFETAC AIR WEATHER SERVICE/MAC PFRLLIIAE FREQLENCY OF OCCURRENCE OF SKY COVER FROM HOU;LY OBSERVATIONS STATION NUMBER: STATION NAME: VAN NUYS CA PERIOD OF RECORD: MONTH: NOV o o PERCEITAO FREQUENCY OF TENTHS OF TOTAL SKY COVER HOURS I TOIAL ILS ) MEAN OBA...o......o UO-02 ot-cs A3.b k I I T S A p Rb I TOTALS T.8 52z STATION NUMBER: STATION NAME: VAN NLS CA PRIOD OF RECORD: MONT : DEC * I... o PEREEVTAGE FREQUENCY OF TENTHS OF TOTAL SKY COVER HOUR$ I TOTAL I ILSTI S I0 MEAN O o... o ET-O5 I T b-A I S I b I5-IS I ? , Y. 9b TOTALS (

226 6LOBAL CLIMATOLOGY BRANCH PERCLITAGE FREQUENCY OF OCCtJu ENCE OF SY COv-R USAFETAC FROM HOURLY OBSILVE IONS AIR WEATHER SERVICE/MAC STATION NUM9ER: STATION NAME: VA4 NLYS CA 'E 11Oc Of RECOPD: MrNT-: ALL PERCEI TAGE FREQUENCY OF TENTHS OF TOTAL SKY COVER HOURS I TOTAL (LST I C n ECA4 OtS... o o... JAN ALL C 25.5 S FCE 31.6C 2C MAR I t APR MAY j f, JUN JUL R.z ) s5 ALG se p OCT , NOV DEC I TOTALS N

227 FPPPPPPP ALLALA1, RPFIARL TIITTITTT IEELEEEEC fppppppp "FA AAA RpRRRppR ITTTTIT 7 [[ IEEFEEfrr pp PP A L A AR R A TT I I PPP PP Lp A L A PRPRIA P TT7 PPPPPPPP A ALLA APAPSAPPAR TT I[CELL PPpppp AAAAL PA R P P I I [1EL pp AR A LA PP R PA IT I p P A? A AL R L TR TEURIIIL PP A AL A P P T I EEEELEE.4 : R917[FEEE

228 TEMPLRAIJRE AND RELATIVE I-UMIDITY SUMMARILS CLML'LATIVF PERCENTAGE FRLQ..IENCY OF OCCURRENCE OF DAILY MAXIMUM IMINIMU M AND MEAN) TEMPFRATURES PERCENTAGE TALULATIONS PRESENTED BY S-DEGREE FA-RENFEIT INCREMENTS PLUS TBfI MEAN, STAND DEV- TATIONS AND TOTAL OBS. PVATION COUNT. THE MINIMUM TA4LI. ALSO INCLUOLS A 33 DEGREE FAHRENHEIT VALUE. SINCE MANY STATIONS/SIITS DO NOT PAVE MAXIMUM/MINIMUM TPESE TEMPERATURES WERE SELECTED BY SCAN- NING TVE FOURLY O8SERVATTONS FOR THE HIGHEST AND LOWEST VALUES. SIATSTICS DO NOT INCLLDE INCOMPLETE MONTHS. FOPE OP MORE COMPLETL MONTHS ARE REQUIRED FOR COMPUTING LXTREME MAXIMUM AND MINIMUM VALUES DATA DERIVED FROM SUMMERY OF DAY DATA. PRESENTED ARE TIE HIGF'FST ILOwESTI TEMPERATURE FOR THE MONTH FOR EACH YEAR. ALSO PRESENTED ARE STATISTICAL VALUES WITI- THE SAME LIMITATIONS MENTIONED TBOVE- AN ASTERIST INDICATES AN INCOMPLETE MONTH. MEANS AND STANDARD DEVIATIONS FOR URY BULB (WET BULB AND DEW POINTI TEMPERATURES DATA DERIVED FROM HOURLY OBSERVATIONS. DATA PRESENTED BY TAL STANDARD 3-IOUR TIME GROUPS VT MONTP, MONTHLY ANT, ANNUALLY TALL YEARS COMAINLDI. PRESENTED ARE MEANS, STANDARD DEVIATION AND OBSERVATION COUNTS. CUMULATIVE PERCENTAGE FREQUENCY OF OCCURRENCE OF RELATIVE HUMIDITY DATA DERIVED FROM HOURLY OBSERVATIONS. SUMMARIZLE By THE STANfARD 3-HOUR TIME GROUPS BY MONTH, MONTHLY AND ANNUALLY (ALL YEARS COMBINEDI. PERCENTAGE VALUES POESINTED IN IT UEGRLE INCREMENTS OF RELATIVE PLMIDITY. ALIO PRESENTED ARE THE MEAN VALUES AND OTSERVATION COUNTS. 0.4

229 ULOdAL CLIMAIOLOGV BRANCH CUMULAIIVL PERCENTAGE OF OCCURRENCE OF MAXIMUM IrMPERATURES USAFEiAC FROM SUMMARY OF DAY DATA AIR EAT"ER SERVICE/mAC STAJION NUMPER: 722A86 STATION NAME: VAN N'tYS CA P'EIOD OF RECORD: 82-46, 4&-SU, ; TEMPIFII JAN FLI MAN APR MAY JUN JUL AUG sip OCT NOV DEC ANNUAL SC GE losj z.0. GE E GE 9 P GE U ,F Z l (IF A fe ,3.2 6b f A. 1 66,1 be GE G l1lu.o GE 551 F U T S UE 5r IE I GE IcO.0 GE C..,..,,,,,.,,,.... *,.,.*.,.,,.,. *,..,,,... *...,. *......* MEAN I 64., u I R TOTAL OBS 6 1 j e...

230 GLOBAL CLIMATOLOGY BRANCH CUMULATIVE PERCENTAGE OF OCCURRENCE OF MINIMUM T-MPRATURES USAFETAC FROM SUMMARY OF DAY DATA AIR WEATHER SERVICE/MAC STATION NUMIR: 722V8b STATION NAME: VAN NUYS CA PERIOD OF RECORU: 4Z-46. 4P-SOh 61- TLMP(FI JAN FELB MAR APR MAY JUN JUL AUG 5LP (CI NOV DEC ANNUAL o GE G.L (E GE f I.? 2.13 E u L go TM.5 P "1.I GE C S I " "!. GE p R.A q GF V O.U 16.0 V.T 9j.1 79.d ',3 GF 1r f0.u I ,5.2 p,.2 b f l1'0.j GE 3CI q OO.5 flo.0, b (,E g c.o Ios.0 61: O.5 c 10 7 MEAN I ~ N 2. 6.,? U b b.27 6,4T b.34 3 R.b78 TOTAL 085 I bpi b3s b S66 5R8 74A...,.,...o.,...,...,......,......,....

231 GLObAL CLIMATOLOGY PRANCH CUMULATIVE PERCENTAGE OF OCCURRLNCE OF M[ A& ILMPLROIURES USAFETAC FROM SUMMARY Of DAY DATA A5 T ATHEP SERVICE/MAC STATION NUMPER: STAIUN NAME: VAN NUYS CA 1LPO Or RLCORD: 42-46, 4.9-S, 61 T E"P I F I i JA 5 F[E MAR APR MA Y JUN JUL AUG SEP OCT NOV DEC AOt. UAL o... f, 'si.2.0 U[ 9 )1.7 : UC F E,[ B-l.o I T4.3.q GE 't '5, 4 19.L b.,[f 7rl 3.3.t N3.? 95.0 P (,E t. I a.c 10.J 8.5 Z Q b q I GE (, ? 'b R GE[ , DD.0 12U0 ) CE 5[cI 7b o G, 49 I 91.L '7.8 9h.8 GE I0.0 1QO. G G " q :j.0 GE 301 I C MEAN I [0 S6.o T su i )9 f, o TOTAL 085 I D , t II IK~~d nn

232 GLObAL CLIMATOLOGY RRANCI,XTREHE VALUES O F MAXIMUM TEMPERATURE USAFETAC IFQOM DAILY OiSRVAT IONSI AIp.EATHEP SERvICL/MAC STATION NUMHER: STATICN NAME: VAN NUIS CA PLQOIO OF tlo0q: S0, b1-b2 73-b- WPOLE OEGREES FAHRENHEIT -M-O-N-T -F-S- ALL YEAq I JAN FEB MAP APP MAY JUN JUL AUG P CT NOV CEC MONTF-S.,,...., ,., oo...., o T * IJ l9 4 I 82 7q U * C 5U * * * IC ICU * lot , I9 1O o0 ISA *9q t J () f IUO ] r' Q LI 3 go g *136 1u2 91 as HS IU *j 106 q , * UO 106 *IJY IS *I09 F3.8r 77 * TON *78 lc U TO A 5 *69 * * *90, *92 -LAN I L.7 I77., I 5.7. S.635 T G (7 5. s TOTAL OS I 6L0 5sq S99 C '; Sb NOIES S I IASLI ON LESS TE-AN FULL MONTHS) (AT LEAST ONL DAY LESS THAN Z4 ObS C m /

233 LOHAL CLIMATOLOGY BRANCH USAF[TAC AIR WEATI-ER SERVICL/MAC XTRCME VALUES OF MINIMUM TIMPERATUfiL FROM DAILY ObSERVATIONSI STATION NUMBER: STATIrN NAME; VAN NIYS CA fltc51d OF RECO8U: 4, SC , 73-8; W4HOLE DEGRBEES FAHRENH(IIT -M-ON-T -H-5- ALL YEAQ I JAN F E MAP 8 APR MAy JUN JUL AUG 1 fi CCI NOV [LC MON I1Hs. o....o.....o o o..o.. o o I g 3z T , 9 44 IC *3 6 5Z C 4 * b S T ( * * ~ I *4q P s *55 52 C j "1 5(I.f. 3*j ) 5(' [ i A4 7t ' TO R a 42 4 U ' B ' ' * S 58-7 '4S A3 *32 37 * t4 '52 3b '38 $ ST C * ~ ~ ~ ~ ~ ~ ~ ~ ~,,, ~. 5.. "LAN I 38.1,,,, 36.8, ,.,,,,.,,,,.,. ' * 88.6,,,o,,...,... S'4.I ,o ,..,.o..., * "* I k C ,NR TOTAL OBS I ''47 ' p 728 NOTES * (BASED BN LESS TI-AN FLLI MONTHS) I IAT LEAST ONE DAY LESS TIAN 24 0jS)!.l

234 ULOBAL CLIMAIOLOGV HRANCF- 089-BUL3 TEMP-RATURES ULG F FPOM MEANS AND STANDARD DEVIATIONS usafltac HOURL 3SEqiTIONS AIR WLATER SFRVICEI/MAC STATION NUMLR: SIATION NAMI: I VA NUyS CA P[ [ OF RECORD: FOURS? SIllS I JAN FEA MAR APR MAT JUN JUL 8116 SEP OCT 408 DEC" ANN LtS I I MEAN I 99 5S 99.5 N SN.? ? ,?.9 Sj.3 ' L3-51 SO I Z ' ?7 lint OSI q. lbs S D I b b.2b1 S b , I R2 ITOT OPSi q , MEAN I , ? _1lji SD I ,439 9.b? q O0 OSI ? S7 9( ? SD I S a.9s b o9sl R ,.,.. *,,.,.,,,.,,,..,.,,,.,,,...,,...,..,..,...,,,, o...., I MEAN I 61.9 SR.C ? is-171 S9 I ?, f] IOi 01S I MEAN I 56.6 S ; '4.1 6?.? 61.1 ( CD I ,1S2 b D b ;b04 [TOT Osl , ,.,......,,,,,,,,..,.... o..,,.. * *,.....,..,,.,., *.. *.... l MrAN I 1] ' ?x El.? (.8, I TOT OHS I MEAN I ALE I SD I 8.3ob b HOURS O1 I '4S 3 490? 526d S458 56w '312 S , ,.,.,.,...., ,,,...,,.oo...,,,,,,,,.,,.....,.,., ,.,

235 GLOBAL CLZMATOLOG BRANCH det-aul TEMP ratures DFG F FROM M A4' AND STANDARD DEVIATIONS USAFETAC HOURLY 3BSERAAIIONS AIR WEATHER SERVICE/MAC STATION NUMBER: 722P86 STATION NAME: VAN NUYS CA P I-0C OF RECORD: 99-8 LS' I I I MEAN I ' A I DB ' wio? OS I a 2R F4 AN 4 ; ' ; ;5: ! so I ? IR ' IToT 0O sa A ' , I MEAN I , 51.S D A ' U9-11! so I JB u B.1 4? 1TO ARS 5$ "! S13 I T I MEAN I b l SD I ' !? 1.13 l1ot OS I MEAN I ' ! S? I q39 7.t,4 ITOT CR i b 559 b3.,..,..,.,,,...,,,.....,,,,,,.,,.,.,,,..,,,.,.... o,..,,....,..,,,,. o,... : I MEAN i SJ SO )9q z , ' ITOT OSI S bI5 M EAN I ;: ; 51.0.; : , ; : ;....;;:; ;; 6 6.o " ,,, 52.2, ALL I 50 I l , 'oupsitot ORsi ,.,.,.,...,.,....,

236 GLOBAL CLIMAITLOY BRANE& DEs-POINI T[M'ERATURES DEG FROM MEANS AND STANUARD DEVIATIONS LSAFETAC HJUPLY IBSE9VAIIONS AIR WEATPER SERVICE/MAC STATION NUMEP: 7Z2886 STATION NAME: VA4 NUYS CA PE100 OF PECORD: R3-AT ;00;51 STATS I JAN FEA MAO APR MAT JUN JUL AUG JET NOV "P DEC ANEf LST I I... IL AN....? " ),]5 so I A , b39 A.92? 1Tor$s RI to I 1.6, ,2 1 llt OBS N A 'N..:..; l :..: 4 :..;:..;:...' ::..i!8. l.... i.. L9~11f SD I I0.7p* I TOT OBSI , I ~. MEA S S) I II b S ITOT OBS R b S I fln I " A.A l ST I J V ,2 10.p ITOT ORSI 543 q ;71... G21...;;i;...;;i I*: ;N*' *' :... ;;Z... ;; [... ;i ; :; ; S T f b.246 ITOT OS 51 6 S r I 3.1 EA I 43 ~ t, t I ' ! ToT o A ) A 4615 ALL I SO I , )23 o.s HOURSI TOT VSI 31S ' S R , *,,., ,, ,..,.....,,..,..,....,, , ,..,,, J

237 GLOBAL CLIMAIOLOGN 887NCH LLIMULATIVF PE4CENTAGE FPOQUENCY OF OCCURRENCE RELATIVE IUMIDITY USAFETAC F PM (40UPLY OBSFV T IONS AIR WEATFER SERVICEIMAC STATION NLMFER: SIATION NAME: VAN NUYS CA PEP1OU' OF PECOPD: MOND : JAN....., ,..,.,,,..,.,.....,....,,,.,......,..,,, MONIHI HOURS I rpercentage FqLQUEN:T or RLATIVE HUMIDITY GRE&TEE THAN I MEAN t TOALI I LST) I... IRELATIVE I NUM I I I lt?% 301 Not SOt IHUMIOIFYI OHS I ,.,... I.,,.....,,..,., ,,,...,..., I I JAN I DD-02 I I I T-e5 I SP ? , IE 6 -C8 I 99. I Q 85.! ? * S7 IO-Ill p T 30tj.n ET.' 02 1 "?-14 9.S o ' 75I S c b ' ITOTA21 I 9.j ' T.2 ST.? 11 I i i S r, S.T n u.9 I. 55.? I.... do.

238 0j A L AC LI'ATCLVCy Q96 H CUMULATIVE PEVCENTAGE F. QIJ7r.CV O O C E',CC VCAT I3t Ft,.,: IIY IrAFETAC FP01 0UtRLY ORSERVAT 1.NS AlT I teati- P SERVIA f:/mrc OTAJI"N 1,C2S5 STT AtMPEL [ON NAME: VAN- NUYS CA 03 irco3": P1.1 1-nl MO, I PEr.ATAGE FEEQLN. DF RELATI VE FLI I IA[Y R, A TL Tp I L I(CV..... C VE I'A II '14 r 1 4 UM1ITT 9' Q 2." A.? T T' C - V V p a '. V.? !l7.. '.7,I). 63., I.? " 55. II-" I,.. of I L f,.. VS. I 9.R I-I MT. I 61.2 sl.c ". T 4'~ : q.~ A.T1 7. 7T? C I A f '.? I0 ITA L A.7 61, '

239 GLObAL CLIMATOLOGY qranch CUMULATIVF PLCE'TAGE F REQUNCY OF OCCURRENCE RELATIVE HUMIDITY USAFLTAC FROM IOURLY OBSERVATIONS AIR SEATHIR SERVICE/MAC STATION NUMLBE: 7?28R STAION NA-E: VAN NLYS [A PLAInS OF RECORD: MONTP: MAR MONIPI I-OURS I ERCrNTA5[ FREOUFNZI OF RELATIVE HUMIDITY GREATER THAN MEAN I TOTAL I I (LST) I... IRELATIVEI NUR I I TA I,%?Lt P t % 301 Rt t IHUMIDIIYI 08S I... *,...,* *,...,.,,..... *. *,*,*... *,... *,.,..,,.... I I MAR I 00-C? I I I0-d IJ.C 100' S PP I Io, R r (19-I I 130, 1 7.' T " RC - I T IS- IT Ij.j '.t )U I s ! g TOTALS I IO.T ' do

240 GL1OBAL CLIMATOLOGYT HRHNCH C UMU1 ATIVWE P[?C E NT AG[ F RE QUENCY OF 7CCoU9 5 ',U' QLAT Idv. LjJ3 USAT-ETAC FROM 40LRLT O8SfPVATI0NS5 AIR WATHER 9R8V1C1/M9C STATION NUMPEP:?;22886 STATION 4ARE: VA4 NUYS CA 1"ILI OF 'IFcip5 6I1O ~~~~~~ R.A. A08 N.[C973.qOC.F.EL.IV.[ib.V.8AC.67. I ILSI!...IEA! I8 APR I00-U I rli H.7 31 I 26-Ug I ' ~ I59-11 I Jn r 8.R ' Q q.2.~ I I ' I f.! I C q ' I r) R I cl T I 9q ~ 7 6,.9b

241 6L tial CLIMTICLOU,1 I *N CH CUMULLATIVL PLICENTAGE FPEQU"N Y OF OCCUPIENC[ PELATIVE 'UMI3]TY USrALTAC F M 40ULY 08SFRVTnN S AIR FAI44 SFAVICL/mAL S TATION NIL fy: H S T AT IN 8kF: VAl NILYS CAA P"10 OF R[CORD: B1-86 PONfl : MAT NI I PERCTNTAG[ reouen:, or fllative HUMIDI7Y RFAlE R THAN I MEAN I TOTAL I TLST) I IRELATIVEI NUT I I tt 2it 36% 42% ij% 833 T o t IHUMIOITYI OdS ,. * ,.*,,.,., I I '(. I 1 D r3., , ' re I [I." 998.q q * ' Oj ? , 58.2 '416 l C I 1 3. I a5[ ' ) I12.n } I 100. J % R 6.P ITOTALS I 1'3.; g k

242 GLObAL CLIMAVTOLOGY BRANCH CUMULATIAE PERCENTAGE FREQIJCNCY OP OCCLJRQENCE RELATVIE H-UMIDITY USAFLTAC FROM 4ILY OBSERVATION4S A IR ilavhfr SERAICE/RAC STATION NUMPLR: STATION NAME: VAN NUYS CA PEnjOO OF PLCORO: RI-9s M019: JUNS ROTjIORM PERCENTAGE F8E0LLN:R OF RELAT IVE BL'RT0TTY GREA TER THt EAN I R T A L I LSII I...IRELATIEI NUM I lot i 20% 3,3? 401 S10t 60t 7g1 R0t 90 [HUMIDITYRI OAT JUN I I UG0-U2I I n-c' 1:3-1: R.'4 R6.R 96.R C.' ! I AI I P-Il I 130c R 61.2 I, ' IS ? R I-23 I Ij) o F l I r rp 74.6( 24 JITOTALS qj..s )

243 (LOUAL CLIMATOLOG'Y A NCH LUMULATIVE PE8OEnTAGE FPEQU-NCY OF OCCURRENCE RELATIE HUMIDITY USAFETAr FROM 4OUMLY OBSERVATIONS AIR WEATHER SFR'ICE/MAC STATION NLE Q: TAY4 NAME: Y414 NLIS CA PER0 OF RECORD: 81-Sb AO'JT- : JUL MONT i-osrs I TEACE4TSDT FEQULN:Y OF RELATIVE HUMIDITY GREATER THAN - A TTAL I (LSTA I...IM(LATISEI MUM I I jot % SOt 601 7ot Rot 90T IHUMIDISI 05 I JUL i 3-u2 r P3-OS 1 jo T AM SP-Cp q9s I b V q 2, T Z4.5 9.q o I5-17 l0.") 91.( I ? b4 Id-2f l Y p IoO. ' TOTALS I10,1 9b I 8, S,.., ,,,,.,,..,.* ,....,

244 GLOBAL CLIMATOLOGY PRANCH CUMULATIVE PE9CETAGE FPLOUtNCY OF OCCUP9ENCE BELATIVC HUMIDITY USAFETAC FROM OL'RLY OBSERYA IONS AIR weatheb SfPVICE/MAC STAIION NUMRER: STATION NAME: VAN NUTS CA rv'l10 OF PCCO3: Al-M6 MONTH? FOURS? PERCENTASE FqEOLLN:, OF AELATIBE UMIDITY ORATE TFAJ I MEAN TOTAL I ILST I ELATIV "UM I I % 2C% Ut NOT t Bi% 0) IHUMII YI B' I..,,.....,,. o......,,.... *,,*, *,,.,,,.,....,..,..., *... AUG I 3-G2 I I 0$-OS I 13.j G I. al I,6 I E6b-O I TO O0,O , l3 1T C 9- I1 I B I. f.., 77' I B V.? 2.7.p qi.? 49t I I Ilo ' C I0o B , I 1-2 3I S.? 256 ITOTALS I I A S9.)) 2531

245 GLOBAL CLIMATOLOGY BRANCH CUMULATIVf PEICETAGE FREQUNCY OF OCCuR91NC P -L ATIVE 9U.IIDITY USAFETAC FROM 40URL OR S VATIONS ALP WFATHEP SERVICEJMAC sr 7ION NUMBEP: 722R86 STAT I(N NIME: VAN NE YS CA 'E"IOO of -LC 3R: 80-qb -ON 1 SVP MO NI 'OURS I PLRCENTAE F3OEYENT, OF QELATIVE HUMIDIY GRATER TH NEAN I I total I ILSTI I.. RLATIVE I U44' l Z I I OZ d C, t~ IU Hum 1 I 0O I T~ YI Op I.I...,, , SEP I00-U M 1o.o 10.T I2oc.0 1O I 6-04 I , ? jb,? I 9-l I [Q f I2-1 91, S R.T ) I-2tl I1-2T q S la STO TA S 99.9 ) I ? b

246 , LOIIAL CLIMATOLOGY PAANCH CUMULATIVE PEICENTAGE FREQU-NCY Or OCCUTNENCE RELArIVL ID TCIT USAFATT APOM 4OUPLY O9SERVATIONS AIP ATIHE R SERVICL/AC STATION NJYmSLO: 7,Rb STA IION NA-E: VAN NUYS CA PInoC Cr LOCOPD: 4 0 -Sb SNT.: OCT I TLSTI I ,....,, o... o o.,.... IV9ELSTISEI_... NU" I... o.. I I., Ic~t '401 50t. 60?.. lot,. SO?.... '[I1 o.. IHLJMIOITTI , OCT I 'TC', ~ I 80.9) bs ?%T TIL ri-cs I TUO.C A I b ; I I , I , I A ? 51.3 T r) 417 TOTALS I O I- c._

247 GLOBAL CLI"AT OLOGY RA NCH CUMJLATIVE PLTCENTAGO F PEUENCY OF OCCURRENCE RELATIVE HUMIDITY UShFElAC FROM IOURLY ORSFRVATIONS AIR WLATHCD SEAVICE/MAC STATION NL'mflT: 722FS S ITATION NANE: VAN NUIS CA F0A000 OF RECORO: 40-OS5 MONT? : NOV MONTI- HOURS I PE CCNTAG( FQL UENOY OF RELATIVE HUMIDITY GREATER THAN I EAN i TOT AL I (LOT) I... IFTELATIGI SJU I ]tt 2"01, S0t 601 7o IHU9IOITYI 085 NOV I- U V0E-C I3 I 1- F O0.3 T J 5C. ' O- 0 I I l f, TI? n -11 I S5.S I F T $14 1 ]5-7 9.x I 14-2 P 1J N A A 21- I n N ?.4 67.M 397 ltotals I 9.R 7! ?S24.

248 6L0HAIt CLIMAIOLOGY BRANCH CUMULATIVE PEITCE4TA6E FREQUONEY OF OCCU ENCE RELATIVL U010 11Y USAFETAC FROM -40URLYV OBSEAVATTONS AIR dtathep STI VICE/MAC STATION NUMLR: STAT1Oh NAME: VAN NUYS CA 'EUIOU OF PE.CORO: 91-Rb Mt'I 1T4 UT C...' ,.. ;..'..,..' ".., : MONT if POURS I FLAZCEN1TAGE FRE OuEN2v OF RELAT I VE -trmio!i T Y SREA TLqI TI-RN I - -AN TOTI A L I ju I 00 3U% 400% 500 I 60%?(Jt Rot 9[ t 141IIT YI 08 OF C I DO- 0 2 I 0-0 r IJ b0.0 40D.31 21). r! 7!.9 15 I 06-O7 I q I z ? L I g i o S q63 I 15-IT 1 uo.3 68.p I -2p Ijo.o " X I A.1 11o AL9 t 1T

249 f O)JIL CLIMAIOLOGI tanch LUMULATIV r PEICENILAGE FRE OWNCY Or OCCURIEN- EELA IV UMIDIT USAIET A CQM 10CURLY O9SERVAIIONS AIR,3AT 9 P S[RVICE/!AC %TATION NL PER: 7229H6 5TATION NAME: VAN NLYS CA P l OL, 0 RCPD: 8(-R7 MOOT,-: ALL I I I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I..I.I.I.I.I.I.I.I.I.I.I.I... I.ELATIYEI NUr 1 p t 20 3~01 i % IHUM10T1Y OY S..,..,, ,...,, , , ,.., o... JAN ALL 9.4 1LC i " I I '.2 30Q 'AI Iue NN., 31, APA '. 67.S I'). 61.N 34 M A I T [ J U N 9 9. ' 9 1.q '., '?. " JUL 13C.7 9s.' ' 4S , 237! AUG I I u.1 97-? 9.T q SEP 9.q q 4.1?, lq33 OC 1 9. q ? N I 9 R b CC I I c.ri F, S ITOTALS , ! ' '

250 ULOEAAL CLIMAIOLOOGY 'RANCH STATION PRESSURE IN INCHES H3 FROM M7ANS AND STANOATD DEVIATIONS USAFLTA C HOUPL Y )BSERVAIONS AIR WEATHER SERVICE/MAC STA]ION NuMnER STATION NAME: VAN kfuts CA P Or (9IV RECORD: L585! STATS I jar reo MAR APR MAY JUN JUL. 905 E,[ OCT "OR D72 AS.. I MEAN 91 I st I 110T OS I I SO I 7 so I q G.Db c9.1oi,I0 I DT ORSJ U 3 I 5")m) 3] ,;, I MEAN I ' '.t] R.l'7 I I I u *o? OHS I 310 2U92 ibl U I1 3t2 IFA I D V IT I SO I ,OR0.368 fs.5.06u %.076 P b S u 32c Too 313 3r sZ2,,,,,,,,,,,,,,,,,,,,,,,o,,,,,,,, ,,,,o,,..,,, I n E 16 I I D67.7j c77 095l o U b5 I PI 1 I *IORU.3f3.05S S n9.15p I M7RN 1 29., b o To060l oo ) 11 I lb 7, S AI.0S5 I ORS I 31L; t9 3J c '' us7 I MEAN 1 29., l ' CLE I SO I.fa P DI i OURS 10 0Sl U I S , ,......

251 DATE