604 
FXUS66 KSGX 280351
AFDSAN

EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CALIFORNIA
900 PM PDT FRI JUN 27 2003

.SYNOPSIS...HIGH PRESSURE ALOFT WILL REMAIN OVER THE AREA... 
WEAKENING SLIGHTLY EARLY NEXT WEEK AND A BIT MORE BY THE MIDDLE OF 
NEXT WEEK. THE MARINE LAYER IS EXPECTED TO DECREASE SATURDAY AND 
THEN INCREASE THROUGH MIDWEEK. LOW CLOUDS WILL PERSIST AT SOME 
BEACHES AFTERNOON.

.DISCUSSION...NKX UPPER AIR NOT AVAILABLE TONIGHT. MARINE LAYER WENT 
UP TO ABOUT 1500 FEET THIS MORNING AND MADE A MOVE INTO THE INLAND 
EMPIRE COOLING DOWN COASTAL AND INLAND AREAS TODAY WHILE THE 
MOUNTAINS AND DESERTS WENT UP A FEW DEGREES. A WEAK UPPER LEVEL LOW 
TO THE NORTHEAST AND VORT MAX WITH THE VORT LOBE EXTENDING TO THE 
COAST WAS RESPONSIBLE FOR AN INCREASE IN THE MARINE LAYER AND THE 
ONSHORE FLOW...BRINGING LOW CLOUDS FARTHER INLAND. THE MARINE LAYER 
IS EXPECTED TO DECREASE TONIGHT. TEMPS IN THE COASTAL AND INLAND 
AREAS ARE EXPECTED TO BE A FEW DEGREES HIGHER SAT AS A HIGH PRESSURE 
RIDGE MOVES OVER THE STATE WITH LITTLE CHANGE ELSEWHERE. THE RIDGE 
MOVES EAST SUNDAY AS HIGH PRESSURE ALOFT FLATTENS OUT AND DECREASES 
SLIGHTLY. THE ONSHORE FLOW IS EXPECTED TO GRADUALLY INCREASE SUNDAY 
THROUGH MID WEEK WITH AN INCREASING MARINE LAYER. TEMPERATURES WILL 
SLOWLY DROP NEXT WEEK. BREEZY CONDITIONS MAINLY IN THE DESERTS ARE 
POSSIBLE WEDNESDAY THROUGH FRIDAY. 

.SAN...NONE.

$$

WHITLOW