Area Forecast Discussion
Issued by NWS Los Angeles, CA

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000
FXUS66 KLOX 290318
AFDLOX

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
820 PM PDT THU MAY 28 2015

.SYNOPSIS...

BUILDING HIGH PRESSURE WILL RESULT IN A WARMING TREND AND A
SHRINKING MARINE LAYER THROUGH SATURDAY. ABOVE NORMAL TEMPERATURES
ARE EXPECTED FOR INLAND AREAS FRIDAY THROUGH SUNDAY. A MOISTURE
STARVED FRONTAL SYSTEM WILL APPROACH THE AREA BY LATE
SUNDAY...BRINGING NEAR NORMAL TEMPERATURES NEXT WEEK.

&&

.SHORT TERM (TONIGHT-SUN)...GENERALLY QUIET WX ACROSS THE FORECAST
AREA EARLY THIS EVENING. MOSTLY CLEAR SKIES PREVAILED FOR MOST
AREAS...ALTHO THERE WERE SOME LOW CLOUDS ALONG THE CENTRAL COAST AND
FROM AROUND SANTA CATALINA ISLAND TO THE L.A. COUNTY COAST FROM
SANTA MONICA TO PALOS VERDES. THE MARINE INVERSION WAS AROUND 1200
FEET DEEP AT LAX THIS EVENING. THE LOW CLOUDS ARE EXPECTED TO EXPAND
ALONG ALL COASTAL AREAS OVERNIGHT AND MOVE INLAND TO SOME OF THE
ADJACENT VLYS...WITH MOSTLY CLEAR SKIES ELSEWHERE. GUSTY S TO W
WINDS FROM THE L.A. COUNTY MTNS TO THE ANTELOPE VLY THIS EVENING
WILL DIMINISH OVERNIGHT.

AN UPPER LEVEL RIDGE JUST OFF THE CA COAST THIS EVENING IS FORECAST
TO BUILD INTO THE AREA THRU FRI...THEN REMAIN OVER SRN CA THRU SAT.
THE UPPER RIDGE WILL SLOWLY WEAKEN SAT NIGHT AND SUN AS AN UPPER
LEVEL TROF APPROACHES THE CA COAST FROM THE E PAC. THE MAY GRAY
PATTERN WILL CONTINUE FOR MOST COASTAL AREAS INTO SOME OF THE
ADJACENT VLYS THRU FRI...WITH NIGHT AND MORNING LOW CLOUDS AND FOG.
OTHERWISE...MOSTLY CLEAR SKIES WILL PREVAIL ACROSS THE REGION.
BREEZY ONSHORE WINDS CAN BE EXPECTED EACH AFTERNOON AND EARLY
EVENING DURING THE PERIOD...ALTHO GUSTY WINDS ARE EXPECTED IN THE
L.A. COUNTY MTNS AND IN THE ANTELOPE VLY. WITH THE UPPER LEVEL RIDGE
LOWERING THE MARINE INVERSION...TEMPS AWAY FROM THE COAST WILL
CONTINUE TO WARM UP NICELY. HIGHS INLAND ARE FORECAST TO BE BE WELL
ABOVE NORMAL FRI AND SAT...WITH HIGHS IN THE LOWER 90S FOR THE
WARMEST VLYS...THEN COOL SLIGHTLY FOR SUN. HIGHS FOR THE IMMEDIATE
COAST WILL REMAIN NEAR NORMAL FOR THE MOST PART THRU SUN.

***FROM PREVIOUS DISCUSSION***

.LONG TERM (MON-THU)...PRETTY QUIET NEXT WEEK. THE TROF WILL BRING
ADDITIONAL COOLING MON/TUE, THEN LEVELING OFF WED BEFORE SOME MORE
COOLING WITH A SECOND TROF FOR THU/FRI. SO EXPECT LOTS OF MARINE LYR
NEXT WEEK WITH TEMPS NEAR NORMAL

&&

.AVIATION...29/0015Z

AT 2320Z THE MARINE LAYER DEPTH AT KLAX WAS AROUND 1000 FT DEEP. THE
TOP OF THE INVERSION WAS NEAR 4100 FEET WITH A TEMPERATURE OF 22
DEGREES CELSIUS.

GENERALLY HI CONFIDENCE IN THE 00Z TAFS. LOW CLOUDS WITH LIFR/
IFR/MVFR CIGS ARE FORECAST TO MOVE INTO THE COASTAL AIRFIELDS THIS
EVENING WITH THE ONSET OF THE LOW CLOUDS RANGING FROM 03Z AT
KLAX...TO 12Z AT KSBA. THE TIMING OF THE DEVELOPMENT OF THE LOW
CLOUDS HAY BE OFF PLUS/MINUS AN HOUR OR SO. THE LOW CLOUDS ARE
EXPECTED TO CLEAR TO VFR BY LATE FRI MORNING TO EARLY FRI
AFTERNOON...EXCEPT LATE FRI AFTERNOON AT KOXR. FOR KBUR AND
KVNY...MOSTLY VFR CONDITIONS ARE EXPECTED THRU FRI AFTERNOON...ALTHO
THERE IS A 40 PERCENT CHANCE OF IFR/MVFR CIGS LATE TONIGHT AND FRI
MORNING. FOR KPRB...KPMD AND KWJF...VFR CONDITIONS WILL PREVAIL THRU
FRI.

KLAX...GENERALLY HI CONFIDENCE IN THE 00Z TAF. LOW CLOUDS WITH
IFR/MVFR CIGS ARE FORECAST TO MOVE INTO THE AIRFIELD BY 03Z THIS
EVENING...ALTHO THE TIMING OF THE LOW CLOUDS MAY BE OFF PLUS/MINUS
AN HOUR OR SO. THE LOW CLOUDS ARE EXPECTED TO CLEAR TO VFR BY 19Z
FRI AFTERNOON WITH VFR CONDITIONS UNTIL 04Z FRI EVENING...FOLLOWED
BY MORE LOW CLOUDS AND MVFR CIGS.

KBUR...GENERALLY HI CONFIDENCE IN THE 00Z TAF. EXCEPT FOR A PERIOD
OF MVFR VSBYS DUE TO HAZE FROM 11Z-18Z...VFR CONDITIONS ARE EXPECTED
THRU FRI AFTERNOON...ALTHO THERE IS A 30-40 PERCENT CHANCE OF
IFR/MVFR CIGS LATE TONIGHT INTO FRI MORNING.

&&

.MARINE...28/800 PM

OUTER WATERS...EXPECT NORTHWEST SCA WINDS TO CONTINUE THROUGH LATE
TONIGHT. SLIGHTLY LESS CONFIDENCE FOR SMALL CRAFT ADVISORY WINDS
OVER THE OUTER WATERS FRIDAY AFTERNOON AND EXPECT THE GUSTS TO BE
ISOLATED UNTIL FRIDAY EVENING. 40% CHANCE A SCA WILL BE NEEDED FOR
LATE FRIDAY AFTERNOON AND OVERNIGHT INTO SATURDAY.

INNER WATERS...WINDS ARE EXPECTED TO REMAIN BELOW SMALL CRAFT
ADVISORY LEVELS THROUGH THE WEEKEND.

&&

.LOX WATCHES/WARNINGS/ADVISORIES...
SMALL CRAFT ADVISORY (SEE LAXMWWLOX).

&&

$$

PUBLIC...SIRARD/MW
AVIATION...SIRARD
MARINE...SMITH/SIRARD
SYNOPSIS...SUKUP

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