162
FXUS66 KSGX 251715
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
915 AM PST TUE NOV 25 2025
SYNOPSIS
HIGH PRESSURE ALOFT WITH WEAK OFFSHORE FLOW WILL BRING WARMING
THROUGH WEDNESDAY. THERE WILL BE LOCAL NORTHEAST TO EAST WINDS
ALONG AND BELOW THE COASTAL SLOPES OF THE MOUNTAINS WITH GUSTS TO
40 MPH. COOLING WILL BEGIN TO SPREAD INLAND ON THURSDAY AND
CONTINUE INTO THE WEEKEND. LOW PRESSURE FROM THE NORTH WILL BRING
GREATER COOLING BY SUNDAY AND MONDAY WITH HIGH TEMPERATURES
FALLING BELOW AVERAGE. CHANCES FOR MEASURABLE PRECIPITATION ARE
GREATEST ON SUNDAY AT 35 TO 45 PERCENT, BUT THERE ARE WIDE
DIFFERENCES ON IF, WHEN, AND HOW MUCH PRECIPITATION MIGHT FALL
AROUND SUNDAY AND MONDAY.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
UPDATE
NO CHANGES TO THE FORECAST. CLEAR SKIES CURRENTLY WITH EASTERLY
WINDS STILL ON TRACK TO WARM TEMPERATURES TODAY THROUGH THURSDAY,
PEAKING ON WEDNESDAY AROUND 6 TO 12 DEGREES ABOVE NORMAL. BRIEF
PERIODS OF STRONGER WIND GUSTS, ESPECIALLY EARLY WEDNESDAY MORNING
AND WEDNESDAY EVENING. PLEASE SEE THE AFD FROM THIS MORNING FOR
FURTHER DETAILS.
PREVIOUS FORECAST FROM 313 AM PST
SHORT TERM (TODAY THROUGH THANKSGIVING)
HIGH PRESSURE ALOFT WILL MOVE EASTWARD ACROSS SOUTHERN CALIFORNIA
ON WEDNESDAY, THEN WEAKEN ON THANKSGIVING AS A WEAK LOW PRESSURE
SYSTEM FROM THE WEST MOVES TOWARD SOUTHERN CALIFORNIA AND NORTHERN
BAJA. THERE WILL BE OFFSHORE LOWER LEVEL FLOW WITH PERIODS OF
GUSTY EAST TO NORTHEAST WINDS ALONG AND BELOW THE COASTAL SLOPES
OF THE MOUNTAINS DEVELOPING TODAY AND CONTINUING INTO THANKSGIVING
MORNING WITH GUSTS MOSTLY 40 MPH OR LESS.
HIGH TEMPERATURES FOR THE COAST AND VALLEYS WILL WARM 5 TO LOCALLY
10 DEGREES TODAY WITH ANOTHER FEW DEGREES OF WARMING FOR MOST
AREAS ON WEDNESDAY. WITH THE WARMING, HIGH TEMPERATURES ON
WEDNESDAY WILL BE AS MUCH AS 10 TO 14 DEGREES ABOVE AVERAGE FOR
PORTIONS OF THE VALLEYS WITH HIGH TEMPERATURES RANGING FROM THE
LOWER TO MID 70S NEAR THE COAST TO THE UPPER 70S TO MID 80S FOR
THE VALLEYS WITH THE LOWER DESERTS AROUND 80.
THE WEAK LOW PRESSURE SYSTEM APPROACHING FROM THE WEST ON
THANKSGIVING WILL BRING MID AND HIGH CLOUDS WITH COOLING BEGINNING
TO SPREAD INLAND.
LONG TERM (FRIDAY THROUGH MONDAY)
THE COOLING TREND WILL CONTINUE FOR FRIDAY AND SATURDAY WITH HIGH
TEMPERATURES ON SATURDAY FALLING TO WITHIN A FEW DEGREES OF
AVERAGE, RANGING FROM THE LOWER TO MID 60S NEAR THE COAST TO THE
MID 60S TO LOWER 70S IN THE VALLEYS WITH THE LOWER TO MID 70S FOR
THE LOWER DESERTS.
LOW PRESSURE FROM THE NORTH WILL BRING GREATER COOLING FOR SUNDAY
AND MONDAY, BUT WITH GREATER MODEL SPREAD IN THE DETAILS. NBM
CHANCES FOR MEASURABLE PRECIPITATION ARE GREATEST ON SUNDAY AT 35
TO 45 PERCENT WITH CHANCES FOR ONE INCH OR MORE OF RAINFALL OR
LIQUID-EQUIVALENT IN THE WETTER LOCATIONS IN THE MOUNTAINS AROUND
15 TO 20 PERCENT. THE SNOW LEVEL WILL FALL TO AROUND 5500 FEET ON
MONDAY, BUT WITH THE SPREAD BETWEEN THE 25TH AND 75TH PERCENTILE
INCREASING TO AROUND 2000 FEET.
AVIATION
251600Z...COASTS...VFR VERY LIKELY AFTER THROUGH PERIOD, WITH LESS
THAN 20% CHANCE FOR CIGS THIS EVENING (HIGHEST CHANCES AFTER 26/05Z
THROUGH 26/12Z).
VALLEYS/MOUNTAINS/DESERTS...VFR CONDITIONS EXPECTED THROUGH TONIGHT.
E TO NE WINDS LOCALLY GUSTING 25-35 KTS ALONG COASTAL SLOPES OF THE
MTNS WILL EXPAND TO INCLUDE ADJACENT FOOTHILLS AND PORTIONS OF THE
INLAND EMPIRE AFTER 18Z. AREAS OF LLWS/LOW-LEVEL TURBULENCE ALONG
FOOTHILLS/WEST MTN SLOPES.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH MOST OF
SATURDAY. THERE IS THE POTENTIAL FOR ELEVATED WINDS AND SEAS TOWARDS
LATE SATURDAY OR SUNDAY WITH AN APPROACHING STORM SYSTEM, BUT THE
FORECAST REMAINS UNCERTAIN AT THIS POINT; STAY TUNED FOR UPDATES.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...ZUBER
AVIATION/MARINE...SMALL
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