SOUTHWEST CALIFORNIA AREA FORECAST DISCUSSION
NWS LOS ANGELES/OXNARD CA
AFDLOX 915 PM PDT FRI AUG 6 1999
UNSEASONABLY DEEP UPPER LOW WITH ASSOCIATED VORT MAX CENTERED
NEAR BAY AREA. LATEST WATER VAPOR IMAGERY INDICATING VORT MAX
GRADUALLY LIFTING NORTHEAST...SO IMPACT ON OUR CWA APPEARS TO BE
FAIRLY MINIMAL. DO FEEL THAT STRATUS WILL FILL IN ACROSS PORTIONS
OF OUR DISTRICT OVERNIGHT...AND FOG PRODUCT IMAGERY ALREADY SHOWING
THIS TREND. HOWEVER...WITH VORT MAX MOVING AWAY FROM AREA AND ONSHORE
PRESSURE GRADIENTS WEAKENING...HAVE OPTED TO REMOVE DRIZZLE FROM
VTU/LA COUNTIES AND TRIMMED BACK SOME ACROSS NORTHERN ZONES.
LATEST ACARS SOUNDING SHOWING MARINE LAYER DEPTH AROUND 3400
FEET ACROSS LA BASIN...WHILE 00Z VBG SOUNDING INDICATES MARINE LAYER
DEPTH AROUND 4500 FEET. WITH ONLY WEAK INVERION IN PLACE...OPTED FOR
PARTLY TO MOSTLY CLOUDY CONDITIONS ACROSS MOST AREAS OVERNIGHT.
SLIGHT WARMING TREND EXPECTED THROUGH SUNDAY...MAINLY DUE TO
MORE SUNSHINE EXPECTED DURING AFTERNOON HOURS AND SLIGHT WARMING
IN BOUNDARY LAYER. AS WARMING TAKES PLACE IN BOUNDARY LAYER...EXPECT
MARINE LAYER TO REFORM SATURDAY NIGHT...AT A SLIGHTLY LOWER LEVEL.
IN THE EXTENDED...UPPER TROUGH WILL LINGER AT LEAST THROUGH
TUESDAY...WITH STRATUS REACHING INTO VALLEYS AND TEMPERATURES NEAR
NORMAL OR SLIGHTLY BELOW. MRF INDICATING POSIBILITY OF FAIRLY STRONG
RIDGE BUILDING BACK ACROSS SOUTHERN CALIFORNIA BY MID WEEK...WHILE
EMCWF AND UKMET NOT AS AGGRESSIVE WITH WARMING TREND. IN CURRENT
EXTENDED FORECAST...WENT FOR COMPROMISE...RAISING TEMPERATURES
SLIGHTLY FOR WEDNESDAY.
LAX 0000. GOMBERG
.LAX...NONE.