988
FXUS66 KSGX 272043
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
143 PM PDT SUN JUL 27 2025
SYNOPSIS
A WARMING TREND STARTS TODAY WITH HIGHS WARMING TO NEAR OR SLIGHTLY
ABOVE AVERAGE BY THE MIDDLE OF NEXT WEEK. THURSDAY AND FRIDAY WILL
BE A FEW DEGREES COOLER, WITH MINOR WARMING OVER THE UPCOMING
WEEKEND. LOW CLOUDS AND FOG WILL REACH INTO PORTIONS OF THE VALLEYS
EACH NIGHT AND MORNING.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
VISIBLE SATELLITE AT 1 PM WAS SHOWING MOSTLY CLEAR SKIES FROM THE
BEACHES TO THE DESERTS. THE MARINE LAYER CLOUD DECK WAS 50 TO 60
MILES OFFSHORE. LOW CLOUDS AND FOG ARE EXPECTED TO REDEVELOP OVER
LAND TONIGHT, REACHING INTO PORTIONS OF THE VALLEYS. MARINE LAYER
LOW CLOUDS AND FOG WILL REMAIN PERSISTENT FOR THE COAST AND PORTIONS
OF THE VALLEYS EACH NIGHT AND MORNING THROUGH THE UPCOMING WEEK.
WARMING TREND STARTED TODAY AS HIGH PRESSURE ALOFT BUILDS IN FROM
THE EAST. HIGHS TODAY WILL BE 3 TO 7 DEGREES WARMER THAN YESTERDAY,
WITH MOST AREAS WARMING A FEW DEGREES EACH DAY THROUGH WEDNESDAY.
FOR WEDNESDAY, NBM CHANCES OF THE LOW DESERT EXCEEDING 110 DEGREES
ARE 25 TO 35 PERCENT, LOCALLY UP TO 70 PERCENT NEAR PALM SPRINGS,
WITH A 15 TO 30 PERCENT CHANCE, LOCALLY UP TO 60 PERCENT, OF THE
INLAND EMPIRE REACHING OR EXCEEDING 100 DEGREES.
A WEAK TROUGH OF LOW PRESSURE WILL MOVE EAST INTO CENTRAL CALIFORNIA
FOR THURSDAY AND FRIDAY. THAT WILL BRING A FEW DEGREES OF COOLING
ACROSS THE AREA. THE SUBTROPICAL RIDGE TRIES TO BUILD NORTH INTO THE
SOUTHWESTERN UNITED STATES FOR THE UPCOMING WEEKEND, BRINGING SOME
WARMING TO THE AREA.
AVIATION
271945Z....COASTS/VALLEYS...LOW CLOUDS HAVE PULLED WELL OFFSHORE
THIS AFTERNOON, AND VFR CONDITIONS WILL PREVAIL THROUGH EARLY THIS
EVENING. CLOUDS RETURN TO COASTAL AREAS 28/03-06Z, WITH LOWER BASES
AROUND 1200-1800 FT MSL, MOVING INLAND 15-20 MILES BY 13Z. CLOUDS
WILL LIKELY (70% CHANCE) REMAIN OUT OF THE INLAND EMPIRE. CLOUDS
SCATTER OUT AGAIN MON 16-18Z.
MOUNTAINS/DESERTS...MOSTLY CLEAR WITH VFR CONDITIONS THROUGH MONDAY
MORNING.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH FRIDAY.
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...CO
AVIATION/MARINE...CSP
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