EXTREME SOUTHWESTERN CALIFORNIA AREA FORECAST DISCUSSION
NWS SAN DIEGO CA
AFDSAN 310 AM PDT SAT APR 8 2000
...SYNOPSIS...
A WEAK UPPER LEVEL LOWER PRESSURE SYSTEM WILL MOVE INLAND INTO
OREGON AND NORTHERN CALIFORNIA TODAY THROUGH SUNDAY WITH A GRADUAL
COOLING TREND FOR SOUTHWEST CALIFORNIA. SEASONAL WEATHER WILL
CONTINUE THROUGH THE FIRST HALF OF NEXT WEEK.
...DISCUSSION...
BENIGN WEATHER PATTERN FOR SW CA TO CONTINUE THRU THE WEEKEND. WK
UPR LOW OFF THE NRN CA CST TO LIFT SLOWLY INLAND INTO OREGON AND NRN
AND CNTRL CA THRU SUN TO BE REPLACED BY ANOTHER CLOSED LOW OVR THE
ERN PAC ALG 140W FOR EARLY NEXT WEEK. HEIGHTS AND THICKNESSES
GRADUALLY LWR OVR SRN CA TODAY AND SUN WITH SOME INCR IN ONSHR LOW
LVL FLOW. THIS SHOULD BRING GRADUAL COOLING TODAY AND SUN TO ALL OF
SW CA. COMBINATION OF LWRG HEIGHTS...INCR IN ONSHR FLOW...AND
POSSIBLE CSTL EDDY TONIGHT ALL FAVOR SOME DEEPENING OF THE MARINE
LYR TONIGHT THRU SUN MORNING. FRI EVENING RAOBS AND ACARS SOUNDINGS
SHOWED THE BASE OF THE MARINE INVERSION HAD LOWERED TO BETWEEN 1000
AND 1500 FT WITH THE TOP OF THE INVERSION AROUND 3000 FEET. THIS IS
A DECR OF AROUND 500 FEET FM 24 HOURS AGO. NW EDGE OF THE
SUBTROPICAL CIRRUS FLOWING ACROSS SRN CA FM THE SW IS NR LAX AT 08Z
WITH MDLS GRADUALLY NUDGING THIS AXIS OF SUBTROPICAL HIGH LVL MSTR
TO THE E DURG THE DAY.
EXTENDED...WK UPR RDG WL REMAIN ACROSS SRN CA WITH ONLY MINOR DAY TO
DAY CHANGES IN TEMPERATURES AND CSTL CLOUDS.
SAN 000
.SAN...NONE.
MARTIN