Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 270949
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
249 AM PDT WED MAY 27 2015

.SYNOPSIS...
SEASONAL WEATHER WILL CONTINUE FOR THE NEXT WEEK WITH WEAK ONSHORE
FLOW AND A PERSISTENT MARINE LAYER. HIGH PRESSURE WILL BRING AN
INLAND WARMING TREND THROUGH SATURDAY. A MODERATELY DEEP MARINE
LAYER WILL BECOME SOMEWHAT SHALLOWER FOR FRIDAY THROUGH THE
WEEKEND. FOR SUNDAY THROUGH EARLY NEXT WEEK...A TROUGH OF LOW
PRESSURE WILL MOVE INLAND ALONG THE WEST COAST. THIS WILL BRING
AN INLAND COOLING TREND ALONG WITH DEEPENING OF THE MARINE LAYER.

&&

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

SEASONAL WEATHER WILL CONTINUE FOR THE NEXT WEEK. HIGH PRESSURE
WILL DEVELOP OFF THE CALIFORNIA COAST...THEN MOVE SLOWLY INLAND
DURING THE WEEKEND. THIS WILL BRING AN INLAND WARMING TREND
THROUGH SATURDAY WITH HIGH TEMPERATURES WARMING TO NEAR TO
SLIGHTLY ABOVE AVERAGE FOR THURSDAY...AND AROUND 5 DEGREES ABOVE
AVERAGE FOR FRIDAY THROUGH THE WEEKEND. A MARINE LAYER NEAR 3500
FEET DEEP WILL BECOME A LITTLE SHALLOWER FOR TONIGHT INTO THURSDAY
MORNING...THEN GRADUALLY SHALLOWER FOR FRIDAY INTO THE WEEKEND. AN
EVENING AIRCRAFT SOUNDING FROM SAN DIEGO SHOWED A FAIRLY DEEP
SATURATED LAYER FROM 1200 FEET TO AROUND 3500 FEET MSL. THIS IS
SIMILAR TO THE PAST TWO NIGHT NIGHTS...BOTH OF WHICH HAVE BEEN
SUFFICIENT FOR PATCHY DRIZZLE FROM BEFORE SUNRISE INTO THE
MORNING. SOME PATCHY DRIZZLE IS ALSO POSSIBLE AGAIN FOR LATE
TONIGHT INTO THURSDAY MORNING...THOUGH THE MARINE LAYER IS
EXPECTED TO BE SLIGHTLY SHALLOWER. NIGHT AND MORNING COASTAL LOW
CLOUDS AND FOG WILL EXTEND ONTO THE LOWER COASTAL MOUNTAIN SLOPES
EARLY THIS MORNING...INTO THE FAR INLAND VALLEYS INTO THURSDAY AND
FRIDAY MORNINGS...THEN NOT QUITE AS FAR INTO THE VALLEYS FOR THE
WEEKEND. CLEARING MAY STILL CONTINUE TO BE LIMITED AND/OR SLOW
NEAR THE COAST...BUT IS EXPECTED TO GREATER AND FASTER FARTHER
INLAND FOR LATE IN THE WEEK INTO THE WEEKEND.

FOR SUNDAY THROUGH EARLY NEXT WEEK...A TROUGH OF LOW PRESSURE WILL
DEVELOP NEAR THE WEST COAST. THIS WILL BRING AN INLAND COOLING
TREND AND DEEPENING OF THE MARINE LAYER.

&&

.AVIATION...

270900...LOW CLOUDS WILL COVER THE COASTAL BASIN ALONG WITH PATCHY
DRIZZLE THIS MORNING. BASES WILL BE 1500-2000 FEET MSL WITH TOPS UP
TO AROUND 3200 FEET. VIS 3-5SM WHERE TERRAIN MEETS THE CLOUD LAYER
AND ALSO WHEN/WHERE DRIZZLE OCCURS. A GRADUAL SCATTER OUT IS
EXPECTED FROM INLAND TOWARD THE COAST DURING THE LATE MORNING INTO
AFTERNOON. IF ANY COASTAL CLEARING OCCURS IT WOULD BE BRIEF. LOW
CLOUDS WILL SPREAD INLAND DURING THE EVENING...BUT WITH A LOWERING
CLOUD LAYER. BASES CLOSER TO 1000 FEET MSL WITH TOPS TO 2500 FEET.
ABOVE AND BEYOND THE MARINE LAYER...VFR CONDITIONS THROUGH TONIGHT
WITH ONLY PASSING HIGH CLOUDS AT 20000 FEET THIS MORNING.

&&

.MARINE...

200 AM...NO HAZARDOUS MARINE WEATHER IS EXPECTED THROUGH SUNDAY
NIGHT.

&&

.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...17
AVIATION/MARINE...MM


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