111 
FXUS66 KLOX 202100
AFDLOX

SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA
200 PM PDT FRI SEP 20 2002

SATELLITE IMAGERY SHOWING LOW CLOUDS AND FOG LINGERING
ALONG THE IMMEDIATE COASTAL AREAS THIS AFTERNOON. THIS
DUE TO A COMBINATION OF ONSHORE TRENDS...LOW AND STRONG
INVERSION...AND COOLER THAN NORMAL SEA SURFACE TEMPERATURES.
AS THE UPPER RIDGE BUILDS OVER THE AREA TONIGHT AND SATURDAY...
ONSHORE PRESSURE GRADIENTS WILL WEAKEN...AND MAY TURN SLIGHTLY
OFFSHORE SATURDAY MORNING. THIS WILL CREATE IDEAL SCENARIO
FOR DENSE FOG ACROSS MANY OF THE COASTAL AREAS OVERNIGHT AND
SATURDAY MORNING...LEADING TO POSSIBLE DENSE FOG ADVISORIES
BEING ISSUED BY LATER SHIFTS. 

INFLUX OF SOME MARINE AIR INTO THE VALLEYS THIS MORNING HAS
CAUSED SOME COOLING TODAY. THIS WILL BE SHORT LIVED...AS
WARMING TREND IS STILL ON TRACK THIS WEEKEND FOR ALL INLAND
AREAS. WITH HEIGHTS BUILDING...ONSHORE TRENDS WEAKENING...
AND BOUNDARY LAYER TEMPERATURES CLIMBING...WILL SEE SOME
VALLEY LOCATIONS BREAK 100 DEGREES THIS WEEKEND. WHILE THERE
WILL BE SOME WARMING ACROSS INLAND PORTIONS OF THE COASTAL
PLAIN...WARMING NEAR THE IMMEDIATE COAST WILL BE RATHER MINIMAL
DUE TO CONTINUE MARINE LAYER INFLUENCES. IN FACT...WILL LIKELY
SEE PARTIAL CLEARING ONCE AGAIN ON SATURDAY AFTERNOON ACROSS
MANY OF THE BEACHES. 

UPPER RIDGE WILL GRADUALLY WEAKEN THROUGH THE EXTENDED PERIOD...
LEADING TO A VERY SLOW COOL DOWN THROUGH THE WEEK. STILL NO
PRECIPITATION IN SIGHT.

LAX 0000. GOMBERG

.LOX...NONE.