932
FXUS66 KSGX 040451
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
851 PM PST WED DEC 3 2025
SYNOPSIS
WEAK TO MODERATE SANTA ANA WINDS WILL CONTINUE THROUGH FRIDAY,
WITH THE STRONGEST WINDS EXPECTED TONIGHT INTO THURSDAY.
CONDITIONS WILL GRADUALLY WARM THURSDAY THROUGH THE MIDDLE OF NEXT
WEEK. HIGH CLOUDS WILL OCCUR INTERMITTENTLY THROUGH THE NEXT WEEK
WITH LOW CLOUDS UNLIKELY.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
THIS EVENING, VARIABLE HIGH CLOUDS ARE MOVING FROM NORTH TO SOUTH
OVER THE REGION BUT SATELLITE IMAGERY SHOWS NO LOW CLOUDS. SFC
PRESSURE GRADIENTS CONTINUE TO TREND OFFSHORE AND ARE -5.0 MB SAN-
TPH. IN THE LAST HOUR, THE WINDY LOCATIONS HAVE REPORTED NORTHEAST
TO EAST WINDS GUSTING 25 TO 45 MPH.
FROM PREVIOUS DISCUSSION...
A SURFACE HIGH DEVELOPING OVER THE GREAT BASIN, HAS TURNED THE
PRESSURE GRADIENT OFFSHORE AND BROUGHT PERIODS OF SANTA ANA WINDS
TO THE FOOTHILLS AND COASTAL MOUNTAIN SLOPES. GUSTY WINDS OUT OF
THE NORTHEAST TO EAST WILL BECOME MORE WIDESPREAD TONIGHT INTO
THURSDAY MORNING. ALONG AND BELOW THE COASTAL SLOPES OF THE
MOUNTAINS AND THROUGH PASSES PEAK GUSTS OF 40 TO 50 MPH, LOCALLY
UP TO 55 MPH ARE EXPECTED. NORTHEAST TO EAST WINDS WILL CONTINUE
INTO FRIDAY MORNING, BUT WITH DECREASING COVERAGE AND STRENGTH.
GUSTS ON FRIDAY ARE EXPECTED TO PEAK AT ABOUT 35 MPH. LOWEST
DAYTIME HUMIDITY ON THURSDAY AND FRIDAY FOR THE VALLEYS AND INLAND
COASTAL AREAS WILL FALL TO 15 TO 25 PERCENT.
OVERNIGHT TEMPERATURES TONIGHT WILL FALL INTO THE 30S IN WIND
SHELTERED VALLEY LOCATIONS AND IN THE HIGH DESERT. DAYTIME HIGH
TEMPERATURES WILL GRADUALLY WARM THURSDAY THROUGH THE MIDDLE OF NEXT
WEEK. HIGHS TUESDAY AND WEDNESDAY WILL BE 10 TO 18 DEGREES ABOVE
AVERAGE FOR INLAND AREAS. PERSISTENT WEAK OFFSHORE FLOW INTO NEXT
WEEK WILL KEEP LOW CLOUDS MOSTLY ABSENT FROM THE COAST. PERIODS OF
HIGH CLOUDS WILL OCCUR AT TIMES.
AVIATION
040400Z....COASTS/VALLEYS/MOUNTAINS...VFR CONDITIONS EXPECTED
THROUGH THURSDAY EVENING. ELEVATED EAST TO NORTHEAST WINDS CURRENTLY
GUSTING 25-35 KTS THROUGH MOUNTAIN PASSES, ALONG COASTAL SLOPES AND
THROUGH ADJACENT FOOTHILLS, LOCALLY INTO THE VALLEYS (INCLUDING VCTY
KONT). WINDS LOCALLY GUSTING TO 40 KTS THROUGH MOUNTAIN PASSES.
AREAS OF LLWS AND MOD UP/DOWNDRAFTS ARE EXPECTED DOWNWIND OF THE
MOUNTAINS. WINDS WILL REMAIN ELEVATED IN THESE AREAS THROUGH 18Z
BEFORE SLOWLY WEAKENING AND BECOMING CONFINED TO MOUNTAIN SLOPES AND
PASSES.
DESERTS...VFR CONDITIONS THROUGH THURSDAY EVENING WITH A FEW TO SCT
HIGH CLOUDS AROUND 20000-25000 FT MSL.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED TODAY THROUGH SUNDAY.
BEACHES
VERY HIGH TIDES WILL OCCUR THURSDAY AND FRIDAY MORNINGS,
THREATENING COASTAL FLOODING, MINOR TIDAL OVERFLOW AND BEACH
EROSION. CHANCES OF THESE IMPACTS ARE HIGHEST THURSDAY MORNING AS
ELEVATED SURF UP TO 5-6 FEET WILL COMBINE WITH THE HIGH TIDES,
MOSTLY IN SAN DIEGO COUNTY. CHECK THE COASTAL HAZARD MESSAGE FOR
DETAILS.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...BEACH HAZARDS STATEMENT THROUGH FRIDAY MORNING FOR ORANGE COUNTY
COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.
PZ...NONE.
PUBLIC...PG
AVIATION/MARINE/BEACHES...KW
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