Weather Service Report


251 
FXUS66 KSGX 311132
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
415 AM PDT TUE MAR 31 2015

.SYNOPSIS... 
A LOW PRESSURE SYSTEM MOVING INLAND TO THE NORTH TODAY AND A 
SECOND LOW PRESSURE SYSTEM MOVING INLAND THROUGH CALIFORNIA ON 
WEDNESDAY WILL BRING STRONGER ONSHORE FLOW INTO THURSDAY WITH INLAND 
COOLING...GUSTY WEST WINDS IN THE MOUNTAINS AND DESERTS...AND 
AREAS OF NIGHT AND MORNING COASTAL LOW CLOUDS AND FOG EXTENDING 
INLAND INTO PORTIONS OF THE VALLEYS. FOR FRIDAY...HIGH PRESSURE 
ALOFT AND WEAK OFFSHORE FLOW WILL BRING WARMING WITH GUSTY NORTHEAST 
WINDS NEAR THE COASTAL FOOTHILLS. FOR NEXT WEEKEND...A LOW PRESSURE 
SYSTEM DEVELOPING NEA THE WEST COAST WILL BRING A RETURN OF 
ONSHORE FLOW AND A COOLING TREND. 

&&

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

.SHORT TERM (TODAY THROUGH THURSDAY)...
A TROUGH OF LOW PRESSURE MOVING INLAND TO THE NORTH AND A SECOND 
TROUGH OF LOW PRESSURE MOVING INLAND THROUGH CALIFORNIA ON WEDNESDAY 
WILL MAINTAIN STRONGER ONSHORE FLOW. THIS WILL BRING AN INLAND 
COOLING TREND...GUSTY WEST WINDS FOR THE MOUNTAINS AND DESERTS...AND 
SLOW DEEPENING OF THE MARINE LAYER WITH AREAS OF NIGHT AND MORNING 
COASTAL LOW CLOUDS AND FOG EXTENDING FARTHER INLAND INTO THE 
VALLEYS. WEST WINDS ARE EXPECTED TO BE STRONGEST FOR LATE THIS 
AFTERNOON THROUGH LATE TONIGHT WITH STRONGEST GUSTS IN THE DESERTS 
TO AROUND 45 MPH WITH ISOLATED GUSTS TO 55 MPH BELOW THE BANNING 
PASS.

&&

.LONG TERM (FRIDAY THROUGH MONDAY)...
HIGH PRESSURE ALOFT AND WEAK OFFSHORE FLOW WILL BRING WARMING FOR 
FRIDAY WITH THE GREATEST WARMING WEST OF THE MOUNTAINS. THIS COULD 
PUSH HIGH TEMPERATURES TO NEAR 80 NEAR THE COAST. FOR SATURDAY 
THROUGH MONDAY...A TROUGH OF LOW PRESSURE WILL DEVELOP NEAR THE WEST 
COAST. THIS WILL BRING A RETURN OF ONSHORE FLOW WITH A COOLING TREND.

&&

.AVIATION... 

310900Z... LOW CLOUDS WILL CONTINUE TO SHROUD COASTAL AREAS THROUGH 
17-18Z THIS MORNING. BASES WILL BE AROUND 1000 FEET MSL WITH TOPS TO 
1700 FEET. VIS WILL BE P6SM EXCEPT 3-5SM ALONG INLAND EXTENT OF 
CLOUDS. THE LOW CLOUDS WILL RETURN TO COASTAL AIRPORTS AFTER 03Z 
THIS EVENING WITH BASES CLOSER TO 1500 FEET MSL...AND THEY WILL MOVE 
FARTHER INLAND OVERNIGHT. GUSTY WESTERLY WINDS WILL MOVE THROUGH 
MOUNTAIN PASSES AND INTO ADJACENT DESERTS THIS EVENING WITH ISOLATED 
LLWS IS POSSIBLE IN THEIR LEE.

&&

.MARINE... 

200 AM...BRISK NORTHWEST WINDS AND INCREASING SWELL ARE EXPECTED 
TODAY THROUGH THURSDAY IN THE OUTER WATERS...BUT NO HAZARDOUS MARINE 
WEATHER IS EXPECTED THROUGH SATURDAY.

&&

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

&&

.SGX WATCHES/WARNINGS/ADVISORIES...
CA...WIND ADVISORY FROM 4 PM THIS AFTERNOON TO 3 AM PDT WEDNESDAY FOR 
     APPLE AND LUCERNE VALLEYS-COACHELLA VALLEY-SAN DIEGO COUNTY 
     DESERTS-SAN GORGONIO PASS NEAR BANNING.

PZ...NONE.
&&

$$

PUBLIC...17
AVIATION/MARINE/BEACHES...MM

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