Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 011128
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
428 AM PDT SUN MAY 1 2016

.SYNOPSIS...
LOW PRESSURE OVER THE SOUTHWESTERN STATES WILL WEAKEN WITH A
WARMING TREND THROUGH TUESDAY. RESIDUAL MOISTURE AND WEAK
INSTABILITY WILL BRING A SLIGHT CHANCE OF AFTERNOON AND EARLY
EVENING SHOWERS...MAINLY NEAR THE MOUNTAINS OF SAN BERNARDINO AND
RIVERSIDE COUNTIES. COOLING AND INCREASING CLOUDS FOR WEDNESDAY
AND THURSDAY AS A LOW PRESSURE SYSTEM MOVES SLOWLY ACROSS THE
EASTERN PACIFIC. FOR THURSDAY NIGHT INTO NEXT WEEKEND...A SLOW
MOVING LOW PRESSURE SYSTEM MOVING INTO THE SOUTHWESTERN STATES
WILL BRING MORE CLOUDS...PERIODS OF SHOWERS...AND A SLIGHT CHANCE
OF THUNDERSTORMS.

&&

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

.SHORT TERM (TODAY THROUGH TUESDAY)...
A CLOSED LOW PRESSURE SYSTEM OVER ARIZONA WILL WEAKEN THROUGH
MONDAY WITH WEAK HIGH PRESSURE FOR TUESDAY. RESIDUAL MOISTURE AND
WEAK INSTABILITY WILL BRING A SLIGHT CHANCE OF AFTERNOON AND EARLY
EVENING SHOWERS FOR TODAY AND MONDAY...MAINLY NEAR THE MOUNTAINS
OF SAN BERNARDINO AND RIVERSIDE COUNTIES. THERE WILL BE AN INLAND
WARMING TREND FOR TODAY THROUGH TUESDAY. THE MARINE LAYER WILL
BRING AREAS OF NIGHT AND MORNING LOW CLOUDS AND FOG FOR COASTAL
AREAS AND PORTIONS OF THE VALLEYS THE MARINE LAYER A LITTLE LESS
DEEP FOR TUESDAY.

&&

.LONG TERM (WEDNESDAY THROUGH SATURDAY)...
A SLOW MOVING LOW PRESSURE SYSTEM OVER THE EASTERN PACIFIC WILL
BRING COOLING AND INCREASING CLOUDS FOR WEDNESDAY AND THURSDAY.
FOR THURSDAY NIGHT INTO NEXT WEEKEND WEEKEND...THAT LOW PRESSURE
SYSTEM WILL CLOSE OFF AND MOVE SLOWLY INLAND INTO THE SOUTHWEST
STATES. THIS WILL BRING COOLING...MORE CLOUDS...AND PERIODS OF
SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS. THE GFS MOVES THE
COLDEST AIR AT 500 MB ACROSS SOUTHERN CALIFORNIA THURSDAY NIGHT
AND FRIDAY.

&&

.AVIATION...
010900Z...COAST/VALLEYS...SCT-BKN015-025 TOPS 040 THROUGH 17Z. AFT
17Z...SCT020-030. AFT 03Z...BKN-OVC020-030 REFORMING NEAR THE COAST
AND SPREADING INLAND THROUGH 14Z MONDAY.

MOUNTAINS/DESERTS...SCT-BKN080-120 WITH A SLIGHT CHANCE OF AFTERNOON
SHOWERS OVER THE MTNS AND HIGH DESERTS.

&&

.MARINE...

200 AM...SUNDAY THROUGH WEDNESDAY...LIGHT WINDS EACH NIGHT AND
MORNING FOLLOWED BY ONSHORE NORTHWEST WINDS 10-15 KT EACH AFTERNOON.
THURSDAY AND FRIDAY: A DEEP PACIFIC TROUGH WILL BRING STRONGER AND
MORE CONSISTENT WINDS AND A CHANCE FOR RAIN.

&&

.BEACHES...

200 AM...A LONG PERIOD SOUTHERLY SWELL WILL BRING ELEVATED SURF TO
SOUTHWEST FACING BEACHES TODAY AND MONDAY WITH STRONG RIP AND
LONGSHORE CURRENTS. A BEACH HAZARD STATEMENT IS IN EFFECT...SEE
LAXCFWSGX FOR DETAILS.

&&

.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 THIS EVENING FOR ORANGE COUNTY
     COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.

PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE/BEACHES...MOEDE



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