000 
FXUS66 KLOX 042042
AFDLOX

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
145 PM PDT MON MAY 4 2009

.SHORT TERM (TODAY-FRI)...STRONG NORTHWEST FLOW ALONG WITH A SLOWLY 
BUILDING RIDGE WILL DOMINATE THE WEATHER THIS WEEK. THE RIDGE WILL 
NOT BUILD IN FAST ENOUGH TO KEEP SOME CLOUDS OUT OF THE NORTHERN 
PORTION OF THE FORECAST AREA TONIGHT AND TUESDAY BUT I DO THINK RAIN 
WILL STAY NORTH OF SLO COUNTY. FURTHER SOUTH, THE NORTHWEST FLOW 
WILL BRING ADVISORY LEVEL WINDS TO THE USUAL FAVORED AREAS SUCH AS 
SRN SBA COUNTY AND THE INTERSTATE 5 CORRIDOR AND I DONT SEE ANY 
CHANGE IN THAT PATTERN THROUGH THE REST OF THE WORK WEEK. AS USUAL 
THE STRONGEST WINDS WILL BE DURING THE LATE AFTERNOON THROUGH EARLY 
MORNING HOURS AND I SUSPECT WELL NEED AN ADVISORY EACH DAY FOR 
THIS. AN ADVISORY MAY ALSO BE NEEDED FOR THE ANTELOPE VALLEY TUE AND 
WED. THE COMBINATION OF NORTHWEST FLOW AND LINGERING LOW LVL 
MOISTURE WILL KEEP A FAIR AMOUNT OF CLOUDS BANKING UP AGAIN THE 
MOUNTAINS NEAR THE KERN COUNTY LINE EACH OF THE NEXT COUPLE DAYS.

GOOD WARMING AT LOW LVLS WILL ACCOMPANY THE NORTHWEST FLOW THIS 
WEEK, AND WEVE ALREADY SEEN HINTS OF THIS WITH NEAR 90 DEGREE TEMPS 
IN SBA YESTERDAY. WILL PROBABLY SEE THIS EACH DAY THIS WEEK. 
ELSEWHERE, A NICE WARMING TREND IS EXPECTED THIS WEEK WITH VALLEYS 
GETTING INTO THE 90S. STILL ENOUGH MARINE ONSHORE COMPONENT TO KEEP 
THE BEACHES IN THE UPPER 60S AND 70S, THOUGH THE MARINE LYR SHOULD 
GENERALLY BE CONFINED TO JUST COASTAL LA COUNTY AND THE SG VALLEY AS 
WELL AS ALONG THE CENTRAL COAST.

SOME OF THESE NORTHWEST WINDS WILL BE FILTERING DOWN INTO THE 
VALLEYS AS WELL, ESPECIALLY THE SAN FERNANDO AND SANTA CLARITA 
VALLEYS TUE AND WED, BUT PROBABLY NOT STRONG ENOUGH FOR ADVISORIES. 

.LONG TERM (SAT-MON)...THE RIDGE BREAKS DOWN OVER THE WEEKEND AND 
EARLY NEXT WEEK FOR A COOLING TREND. WILL ALSO LIKELY SEE A MORE 
EXTENSIVE MARINE LYR, OTHERWISE PRETTY BLAND WEATHER AS THE STORM 
TRACK REMAINS WELL TO THE NORTH.

&&

.AVIATION...04/1850Z.
GOOD CONFIDENCE IN TAF PACKAGE FOR THE NEXT 24 HOURS. CURRENT VFR 
CONDITIONS ACROSS THE FORECAST AREA WILL DETERIORATE SOME THIS 
EVENING AS THE MARINE CLOUDS MAKE A RETURN TO PORTIONS OF THE COAST.

KLAX...GOOD CONFIDENCE IN THE RETURN OF LOW CLOUDS AND FOG LATE THIS 
EVENING AND A CLEARING TREND LATE TUESDAY MORNING.

KBUR...HIGH CONFIDENCE IN VFR CONDITIONS THROUGH TUESDAY.

&&

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

&&

$$

PUBLIC...WOFFORD
AVIATION...SWEET

WWW.WEATHER.GOV/LOSANGELES