378 
FXUS66 KSGX 210327
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO
827 PM PDT SUN JUN 20 2004

.SYNOPSIS...A WEAK UPPER TROUGH OF LOW PRESSURE WILL LINGER OVER 
SOUTHERN CALIFORNIA THROUGH MONDAY. COASTAL LOW CLOUDS WILL CONTINUE 
NIGHTS AND MORNINGS WITH SOME CLEARING IN THE AFTERNOONS. LITTLE 
CHANGE IN TEMPERATURES EXPECTED WITH LOCAL GUSTY WINDS OVER THE 
DESERTS AND MOUNTAINS DURING THE AFTERNOONS AND EVENINGS. 

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES.

THE STRATUS CLEARED BETTER TODAY MOST AREAS...BUT REMAINED STUCK TO 
THE CENTRAL SAN DIEGO COAST. AN EDDY CIRCULATION WAS VISIBLE 
OFFSHORE EARLIER. COASTAL OBSERVATIONS AT THIS TIME DO NOT INDICATE 
THAT THE EDDY HAS DEVELOPED ALONG THE COAST. 00Z MIRAMAR SOUNDING 
SHOWS THE MARINE LAYER HAS LOWERED A BIT WITH THE INVERSION BASE 
NEAR 2K FT. ACARS SOUNDINGS FROM LAX SHOW THE INVERSION BASE MAY BE 
ABOUT 500 FT LOWER. ONSHORE GRADIENT REMAIN FAIRLY STRONG WITH ONLY 
SLIGHT VARIATIONS FROM YESTERDAY. PALM SPRINGS REPORTED WIND GUSTS 
OVER 35 MPH THIS EVENING. LATEST FOG LOOP SHOWS STRATUS BEGINNING TO 
FILL BACK IN ALONG THE COAST NOW.

MODELS SHOW WEAK TROUGH REMAINING OVER SOCAL FOR THE NEXT COUPLE OF 
DAYS WITH THE MESO SCALE MODELS AND MOS GUIDANCE CONFIRMING THE 
REDEVELOPMENT OF THE EDDY. EVEN THOUGH THE MARINE LAYER HAS THINNED 
TODAY...EXPECT IT TO REBOUND A FEW HUNDRED FEET OVERNIGHT AS THE 
EDDY SPINS...AND 500 MB HEIGHTS BACK OFF JUST A BIT. THIS SHOULD 
AGAIN MAKE FOR ABUNDANT COASTAL CLOUD COVER IN THE MORNING... 
FOLLOWED BY PARTIAL AFTERNOON CLEARING. 

THE ZONE FORECAST WILL BE UPDATED SHORTLY FOR MINOR CHANGES... 
MOSTLY IN THE FIRST PERIOD.      

&&

.SGX WATCHES/WARNINGS/ADVISORIES...NONE.

&&

$$

JAD