Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 010359
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
859 PM PDT SAT APR 30 2016

.SYNOPSIS...
CONTINUED COOL WITH A DEEP MARINE LAYER AND A SLIGHT CHANCE FOR
SHOWERS AND POSSIBLY THUNDERSTORMS THROUGH SUNDAY EVENING. SOME
SHOWERS COULD LINGER INTO MONDAY MORNING...MAINLY OVER THE
MOUNTAINS. OTHERWISE DRY AND WARMER FOR MONDAY AND TUESDAY. A
GRADUAL COOLING TREND BEGINS ON WEDNESDAY WITH INCREASING CLOUDS
ON THURSDAY. FOR FRIDAY THROUGH THE WEEKEND...EVEN COOLER WITH
GUSTY WEST WINDS AT TIMES...MORE CLOUDS AND CHANCES FOR SHOWERS.

&&

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

MOSTLY CLOUDY THIS EVENING...EXCEPT OVER THE COASTAL AREAS.
ISOLATED LIGHT SHOWERS CONTINUE TO MOVE SOUTHWARD ACROSS THE
REGION IN THE RETURN FLOW FROM THE LOW OVER AZ...LEAVING ONLY
SMALL PRECIP ACCUMULATIONS IN THEIR WAKE. WE CAN EXPECT THIS TYPE
OF ACTIVITY TO CONTINUE INTO SUNDAY AS THE LOW SLOWLY DRIFTS EAST.
CONVECTIVE ACTIVITY COULD INCREASE AGAIN SUNDAY AFTERNOON AS
ANOTHER UPPER LEVEL SHORTWAVE TROUGH MOVES INTO SOCAL FROM THE
NORTH ON THE UPSTREAM SIDE OF THE LARGE-SCALE TROUGH WHICH
CONTINUES TO DOMINATE THE PATTERN OVER THE WESTERN U.S.

SHOWERS DISSIPATE ON MON AND TEMPERATURES RISE AS THE LOW MOVES
EAST AND A RIDGE OF HIGH PRESSURE MOVES IN FROM THE WEST. WARM AND
DRY WEATHER CONTINUES ON TUE...WITH COASTAL LOW CLOUDS AND FOG
DURING THE NIGHT AND MORNING HOURS AS THE HIGH PRESSURE RIDGE
BEGINS TO SHIFT EAST A LOW PRESSURE TROUGH DEEPENS TO THE
NORTHWEST.

FOR WED INTO THE WEEKEND...AS THE TROUGH DEEPENS...FORMS A CLOSED
LOW AND MOVES INLAND ACROSS CALIFORNIA...IT WILL BRING INCREASING
CLOUDS...LOWER TEMPS...STRONG AND GUSTY WEST WINDS...AND CHANCES
FOR PRECIP. CURRENT INDICATIONS ARE FOR PRECIP TO BEGIN THURSDAY
AND CONTINUE THROUGH SATURDAY.

&&

.AVIATION...
010400Z...COAST/VALLEYS...BKN-OVC LOW CLOUDS WITH BASES BETWEEN 1500
AND 2500 FT MSL WILL CONTINUE TO BUILD OVER THE VALLEYS AND COAST
THROUGH 14Z. INITIAL SUB 2000 FT MSL CIGS ALONG THE COAST MAY CREEP
ABOVE 2000 FT MSL AFTER 10Z. CLOUD TOPS WILL BE IN THE 4000 TO 5000
FT MSL RANGE. VISIBILITY MAY BE RESTRICTED TO 3 SM OR LESS WHERE LOW
CLOUDS INTERSECT THE HIGHER TERRAIN OF THE COASTAL FOOTHILLS. CIGS
SHOULD TRANSITION TO SCT AT THE LOCAL TAF SITES AFTER 17Z...WITH
WESTERLY SEA BREEZES EXPECTED SUNDAY AFTERNOON. LOW CLOUDS WILL
RETURN TO THE COAST AFTER 03Z MONDAY.

MOUNTAINS/DESERTS...THE COASTAL SLOPES WILL CONTINUE TO BE OBSCURED
BY LOW CLOUDS THROUGH AT LEAST 17Z...WITH LOCAL VIS RESTRICTIONS OF
3 SM OR LESS POSSIBLE. OTHERWISE PARTLY CLOUDY SKIES AND DECREASING
WINDS WILL PREVAIL THROUGH SUNDAY EVENING.

&&

.MARINE...
900 PM...DIURNALLY DRIVEN WINDS WILL CONTINUE THROUGH WEDNESDAY WITH
BREEZY NORTHWEST WINDS IN THE AFTERNOONS AND LIGHTER WINDS DURING
THE MORNING HOURS. NORTHWEST WINDS WILL LIKELY INCREASE AND BECOME
MORE CONSISTENT THURSDAY INTO FRIDAY AS STORM SYSTEM DEVELOPS ALONG
THE WEST COAST. RAIN SHOWERS ARE ALSO POSSIBLE BY LATE WEEK.

&&

.BEACHES...
900 PM...LONG PERIOD SOUTHERLY SWELL WILL CONTINUES TO BRING
ELEVATED SURF TO SOUTHWEST FACING BEACHES THROUGH SUNDAY. STRONG RIP
AND LONGSHORE CURRENTS ARE LIKELY. A BEACH HAZARD STATEMENT IS IN
EFFECT...SEE LAXCFWSGX FOR DETAILS. SLOWLY DECREASING SURF IS
EXPECTED MONDAY THROUGH FRIDAY.

&&

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


&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...BEACH HAZARDS STATEMENT THROUGH SUNDAY EVENING FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.

&&

$$

PUBLIC...PG
AVIATION/MARINE/BEACHES...BA


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