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[Printable]
676
FXUS66 KSGX 191052
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
352 AM PDT FRI SEP 19 2014

.SYNOPSIS...
A TROUGH OF LOW PRESSURE WILL BRING COOLER WEATHER THROUGH SUNDAY AS
IT MOVES ACROSS CENTRAL CALIFORNIA. NIGHT AND MORNING LOW CLOUDS
WILL SPREAD INTO THE VALLEYS EACH NIGHT. THERE IS A SLIGHT CHANCE
FOR THUNDERSTORMS OVER THE MOUNTAINS SATURDAY AFTERNOON. THE
TROUGH MOVES EAST SUNDAY NIGHT FOLLOWED BY A WARMING TREND AND
SHALLOWER MARINE LAYER EARLY NEXT WEEK...WHICH MEANS THE NIGHT
AND EARLY MORNING LOW CLOUDS WILL BE RELEGATED TO RIGHT NEAR THE
COASTAL STRIP.

&&

.DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE...
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...

A FAIRLY DEEP PENETRATION OF THE MARINE LATER TOOK PLACE LATE
THURSDAY AND BROKEN TO OVERCAST STRATUS DECKS CONTINUE EARLY THIS
MORNING THROUGHOUT THE VALLEYS AND INLAND EMPIRE. UNSEASONABLY
DEEP MARINE INVERSION WILL CONTINUE THROUGH SUNDAY MORNING AND
THEN THE UPPER TROUGH WILL SWING EAST AWAY FROM OUR
REGION.

GUSTY WINDS ARE BEGINNING TO WANE ACROSS THE COACHELLA VALLEY WITH
PEAK GUSTS IN THE 40-45 MPH RANGE ATTM. AS THE GRADIENTS SLOWLY
LAX THESE GUSTY WINDS SHOULD DIMINISH SHORTLY AFTER SUNRISE. WILL
CONTINUE THE WIND ADVISORY CURRENTLY IN EFFECT UNTIL 7 AM.

THE CLOSED UPPER LOW APPROACHES SATURDAY AND STILL LOOKS LIKE IT
COULD HELP TO GENERATE ISOLATED SHOWERS AND STORMS OVER THE
MOUNTAINS AND DESERTS...THEREFORE WILL CONTINUE TO MENTION A
SLIGHT CHANCE OF PRECIP THAT`S CURRENTLY IN THE FORECAST.

THE EXIT OF THE UPPER LOW WILL ALLOW BROAD HIGH PRESSURE TO BUILD
BACK ACROSS SOUTHERN CALIFORNIA THROUGH MID NEXT WEEK.
TEMPERATURES WILL WARM BACK UP THROUGH MID NEXT WEEK BUT NOT TO
EXCESSIVE LEVELS. ANOTHER EAST PAC TROUGH WILL APPROACH THE
CALIFORNIA COAST THURSDAY BRINGING ANOTHER SHOT OF DEEP MARINE
LATER INTRUSION AND OVERALL COOLER TEMPS TO THE REGION.

&&

.AVIATION...
190930Z...COAST/VALLEYS...STRATUS WITH BASES 1800-2300 FT MSL AND
TOPS TO 3000 FT WILL FILL IN WEST OF THE MOUNTAINS THROUGH THE
MORNING. STRATUS CLEARING 15-18Z...MOVING BACK INTO THE COASTAL
AIRPORTS 20/00-03Z AND SPREADING INTO THE INLAND VALLEYS OVERNIGHT.
SIMILAR BASES/TOPS EXPECTED TONIGHT.

MOUNTAINS/DESERTS...MOSTLY CLEAR SKIES WITH UNRESTRICTED
VISIBILITIES THROUGH SAT MORNING.

&&

.MARINE...
230 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH TUESDAY.

&&

.SKYWARN...
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY UNTIL 6 AM PDT EARLY THIS MORNING FOR THE
     COACHELLA VALLEY.

PZ...NONE.

&&

$$

PUBLIC...BROTHERTON
AVIATION/MARINE...SS








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