Area Forecast Discussion
Issued by NWS San Diego, CA

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000
FXUS66 KSGX 282059
AFDSGX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
200 PM PDT THU MAY 28 2015

.SYNOPSIS...WARMER WITH A SHALLOWER MARINE LAYER THROUGH THE
WEEKEND. EXPECT NIGHT AND MORNING LOW CLOUDS AND FOG TO EXTEND
INLAND ONLY TO THE VALLEYS...NOT LIKELY TO REACH THE COASTAL SLOPES.
COOLER WEATHER RETURNS FOR MONDAY THROUGH THURSDAY...WITH A DEEPER
MARINE LAYER AND MORE EXTENSIVE LOW CLOUDS WEST OF THE MOUNTAINS
DURING THE NIGHTS AND MORNINGS. STRONGER ONSHORE FLOW WILL ALSO
BRING PERIODS OF GUSTY WEST WINDS TO THE MOUNTAINS AND ADJACENT
DESERT AREAS.

&&

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

THIS AFTERNOON...THE MARINE LAYER STRATUS HAS MOSTLY CLEARED EXCEPT
FOR PORTIONS OF THE IMMEDIATE COAST. SFC PRESSURE GRADIENTS REMAIN
ONSHORE WITH 5.4 MB SAN-DAG AND 5.1 MB SAN-IPL. THIS IS PRODUCING
LOCALLY BREEZY CONDITIONS IN THE MTNS.

TODAY THROUGH SUNDAY...AN UPPER LEVEL RIDGE OF HIGH PRESSURE MOVING
IN FROM THE WEST WILL BRING A WARMING TREND TO THE REGION...ALONG
WITH A SHALLOWER MARINE LAYER WHICH WILL RESTRICT THE NIGHT AND
MORNING LOW CLOUDS AND FOG MAINLY TO THE COASTAL AREAS AND WESTERN
PORTIONS OF THE INLAND VALLEYS. THE SHALLOW MARINE LAYER COULD
RESULT IN PATCHY DENSE FOG DURING THE NIGHTS AND MORNINGS...MAINLY
ON THE COASTAL MESAS. EXPECT DAYTIME TEMPS TO INCREASE
EVERYWHERE...WITH THE GREATEST INCREASES INLAND. THE WARMEST DAY
WILL LIKELY BE SAT WITH TEMPERATURES IN THE HIGH DESERT IN THE MID
TO UPPER 90S...AND IN THE LOWER DESERTS BETWEEN 100 TO 105.

FOR MONDAY THROUGH THURSDAY...A LOW PRESSURE SYSTEM WILL MOVE INTO
THE PAC NW WITH A TROUGH EXTENDING SOUTHWARD INTO SOCAL. THIS WILL
BRING A COOLING TREND...STRONGER ONSHORE FLOW...AND INCREASING
MARINE LAYER CLOUDS WEST OF THE MTNS. THE STRONGER ONSHORE FLOW WILL
BRING PERIODS OF GUSTY WEST WINDS TO THE THE MTNS AND ADJACENT
DESERT AREAS. DAYTIME TEMPERATURES WILL RETURN TO NEAR OR
SLIGHTLY BELOW NORMAL BY TUE AND CONTINUE THROUGH MID-WEEK.

&&

.AVIATION...

282030...COAST/VALLEYS...LOW CLOUDS WITH BASES DOWN TO NEAR 900 FEET
MSL WITH TOPS AROUND 2000 FEET...WITH LOCAL VIS 3-5SM NEAR HIGHER
TERRAIN...WILL BEGIN TO MOVE INLAND AGAIN THIS EVENING AFTER 29/03Z
BUT REMAIN WEST OF KONT THROUGH FRIDAY. THE LOW CLOUDS WILL CLEAR
BACK TO THE BEACHES MIDDAY FRIDAY. CONFIDENCE IN TIMING OF THE
RETURN OF THE OVC CLOUD COVERAGE AT KSAN THIS EVENING IS MODERATE-
HIGH.

MOUNTAINS/DESERTS...MOSTLY CLEAR WITH UNRESTRICTED VISIBILITIES.

&&

.MARINE...

200 PM...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...PG
AVIATION/MARINE...SMALL



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