Dense Fog in California, April 1, 2002

EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
955 PM PST SUN MAR 31 2002

.SYNOPSIS...NIGHT AND MORNING MARINE LAYER CLOUDS AND FOG WILL
SPREAD INTO THE INLAND VALLEYS THE NEXT SEVERAL NIGHTS...THEN CLEAR
TO NEAR THE COAST EACH AFTERNOON. IT WILL BE WARM IN THE MOUNTAINS
AND DESERTS MONDAY...THEN TURN SLIGHTLY COOLER MIDWEEK AS WEAK LOW
PRESSURE MOVES IN FROM THE WEST.

.DISCUSSION...MARINE LAYER WAS 1600 FEET DEEP THIS EVENING...ABOUT
400 FEET LOWER THAN LAST NIGHT. AS THE CLOUDS SPREAD INLAND
OVERNIGHT DENSE FOG WILL ROLL INTO THE INLAND AREAS AND THE
FOOTHILLS MUCH LIKE IT DID SATURDAY NIGHT. WILL ISSUE A DENSE FOG
ADVISORY FOR THESE AREAS FOR LATER TONIGHT AND THROUGH THE EARLY
MORNING COMMUTE. THIS LOWER MARINE LAYER WILL ALSO BRING LOCALLY
DENSE FOG TO THE HIGHER MESAS IN THE COASTAL ZONES.

ABOVE THE MARINE LAYER IT WAS SUNNY AND WARM WITH MOUNTAIN HIGHS IN
THE 70S AND LOW 80S. DESERTS WERE ALSO QUITE WARM WITH HIGHS IN THE
90S. THIS PATTERN WILL CONTINUE THROUGH MONDAY FOR ANOTHER WARM
AFTERNOON...THEN SLIGHT COOLING MID WEEK FROM LOWER HEIGHTS
ASSOCIATED WITH THE WEAK UPPER TROUGH.

THIS TROUGH WILL SLOWLY DEEPEN THE MARINE LAYER THROUGH MIDWEEK FOR
MORE CLOUDS AT COAST AND CONTINUED DENSE FOG IN THE INLAND VALLEYS
AND FOOTHILLS. COOLER AIR ALOFT SHOULD WEAKEN THE INVERSION MIDWEEK
FOR A BETTER CHANCE OF AFTERNOON CLEARING AT THE COAST.

.SAN...DENSE FOG ADVISORY...SEE LAXNPWSAN.

MOEDE