Drought in California, June 1 to 30, 2009

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
830 PM PDT SUN MAY 31 2009

.SYNOPSIS...NIGHT AND MORNING LOW CLOUDS AND PATCHY FOG WILL
CONTINUE IN THE COASTAL AND VALLEY AREAS THROUGH MOST OF THIS
WEEK...WITH PATCHY DRIZZLE TONIGHT INTO MONDAY MORNING. TEMPERATURES
WILL REMAIN BELOW SEASONAL AVERAGES IN THOSE AREAS...WHILE THE
MOUNTAINS AND DESERTS REMAIN NEAR SEASONAL AVERAGES. THE LATTER HALF
OF THE WEEK WILL BRING INCREASING MID AND HIGH CLOUDS...BREEZY
CONDITIONS AND A BIT LOWER TEMPERATURES TO THE MOUNTAINS AND DESERTS
AS WELL.

&&

.DISCUSSION...FOR SOUTHWEST CALIFORNIA INCLUDING SAN DIEGO...
ORANGE...SOUTHWEST SAN BERNARDINO AND WEST RIVERSIDE COUNTIES.

ONE SMALL THUNDERSTORM DEVELOPED OVER THE LOCAL MTNS THIS AFTERNOON
BUT DID NOT LAST LAST VERY LONG. THE THREAT OF CONVECTION DECREASES
TOMORROW AS WEAK HIGH PRESSURE ALOFT IS FOLLOWED BY DRIER SW FLOW.
THE MARINE LAYER IS ABOUT 2500 FT DEEP THIS EVENING AND THE BOUNDARY
LAYER REMAINS MOIST ENOUGH FOR SOME PATCHY DRIZZLE AGAIN TONIGHT
INTO MONDAY MORNING AS THE LOW CLOUDS SPREAD INLAND. THE MARINE
LAYER WILL PERSIST WITH NIGHT AND MORNING LOW CLOUDS AND FOG IN THE
COASTAL AREAS AND VALLEYS THROUGH TUESDAY...WITH PROGRESSIVELY
BETTER CLEARING EACH AFTERNOON.

LONG RANGE BOTH THE GFS AND THE EC COMPUTER MODELS PERSIST IN
BRINGING A RATHER LARGE LOW PRESSURE SYSTEM FOR THIS TIME OF YEAR TO
JUST OFF THE CENTRAL CALIFORNIA COAST BY MID WEEK. THE LOW IS
FORECAST TO MOVE INLAND INTO CENTRAL CALIFORNIA NEXT WEEKEND AND
EARLY NEXT WEEK. SINCE IT IS JUNE IT WILL MOST LIKELY BRING A DEEP
MARINE LAYER WITH RELATIVELY DRY SOUTHWEST FLOW ALOFT AND KEEP THE
MONSOON MOISTURE AWAY FOR SOUTHERN CALIFORNIA. WESTERLY WINDS WILL
ALSO INCREASE AND BECOME GUSTY IN THE MOUNTAINS AND DESERTS STARTING
ABOUT WEDNESDAY.

&&

.AVIATION...
010330Z...WIDESPREAD STRATUS WILL AGAIN OCCUR OVERNIGHT W OF THE
MTNS WITH VARIABLE BASES...GENERALLY 800-2000 FT MSL AND WITH TOPS
TO NEAR 3000 FT MSL. AREAS OF VIS 2 TO 4 MILES WILL OCCUR WITH LOCAL
DRIZZLE. AREAS OF TERRAIN WILL BE OBSCURED WITH LOCAL DENSE FOG IN
THE VICINITY. MARINE LAYER SHOULD BE A LITTLE MORE SHALLOW MONDAY
WITH A LITTLE MORE CLEARING THAN SUNDAY. CLEARING TIMES WILL BE
16Z-19Z IN THE VALLEYS AND 19Z-21Z IN AREAS 5-10 MILES INLAND FROM
THE COAST WITH LITTLE/NO CLEARING AT THE COAST. ABOVE THE MARINE
LAYER...OCCASIONAL CLOUDS AT/ABOVE FL150 WILL OCCUR...THOUGH CU/TCU
WILL BE LESS COMMON MONDAY.

&&

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

&&

PUBLIC...PG
AVIATION...MAXWELL