Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 190354
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
755 PM PST THU DEC 18 2014

.SYNOPSIS...
SOME CLOUDS WILL LINGER OVERNIGHT...BUT FAIR...DRY AND MILD WEATHER
IS ON TAP FOR FRIDAY UNDER A WEAK RIDGE OF HIGH PRESSURE ALOFT.
ANOTHER WEAK LOW PRESSURE TROUGH WILL BRING A SLIGHT CHANCE OF
SHOWERS FRIDAY NIGHT THROUGH SATURDAY MORNING BEFORE A LARGE UPPER
HIGH EXPANDS OVER THE STATE FROM THE WEST. THE HIGH WILL BRING DRY
AND MUCH WARMER WEATHER EARLY NEXT WEEK. COOLER BY CHRISTMAS AND
THROUGH THE HOLIDAY WEEKEND AND CONTINUED DRY.

&&

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

AFTER A FEW LIGHT SHOWERS AND LAYERS OF THICK CUMULUS CLOUDS TODAY
ALONG AND WEST OF THE MOUNTAINS...SKIES ARE PARTLY CLOUDY. SURFACE
PRESSURE GRADIENTS ARE VERY WEAK AND WINDS LIGHT. THE 00Z MIRAMAR
SOUNDING STILL INDICATED A MOIST LAYER UP THROUGH ABOUT 9K FT SO
EXPECT PATCHY CLOUDS TO CONTINUE OVERNIGHT.

THE WEATHER WILL REMAIN QUIET ALL THE WAY INTO THE HOLIDAY WEEKEND.
OTHER THAN A WEAK TROUGH FORECAST TO DRIFT OVER THE REGION FRI
NIGHT...HIGH PRESSURE WILL BE IN CONTROL ALOFT THROUGH AT LEAST NEXT
TUESDAY. AT THE SURFACE...ONSHORE FLOW WILL PREVAIL THROUGH SAT...
THEN TURN OFFSHORE SUN AND MON..SHRINKING THE MARINE LAYER BACK TO
THE COASTAL AREAS. DAYTIME TEMPERATURES WILL BE RUNNING SOME 5 TO 10
DEGREES F ABOVE AVERAGE MON/TUE...WITH SOME SPOTS EXPECTED TO BE AS
MUCH AS 15 DEGREES ABOVE NORMAL.

THE LATEST GLOBAL MODEL RUNS LOOK SIMILAR INTO THE HOLIDAY
WEEKEND...THEN DIVERGE TOWARD THE END OF NEXT WEEK. SO FORECAST
CONFIDENCE IS MODERATE TO HIGH THROUGH ABOUT NEXT FRI...THEN FALLS.

&&

.AVIATION...
190330Z...VARIABLE CLOUDINESS WILL CONTINUE THROUGH FRI...WITH
SCT-BKN BASES MOSTLY 5000-7000 FT MSL WITH LAYERS UP TO 20000 FT
MSL. MOST VIS WILL REMAIN 5+ MILES EXCEPT WHERE LOCAL TERRAIN
OBSCURATIONS OCCUR IN THE MOUNTAINS.

&&

.MARINE...
730 PM...NO HAZARDOUS WEATHER CONDITIONS ARE EXPECTED OVER THE
COASTAL WATERS THROUGH TUESDAY.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...NONE.
PZ...NONE.

&&

$$

PUBLIC...JAD
AVIATION/MARINE..MAXWELL










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