957
FXUS66 KSGX 060434
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
834 PM PST FRI DEC 5 2025
SYNOPSIS
WEAKER WINDS WILL OCCUR ACROSS THE REGION THIS WEEKEND, WITH
FAIR WEATHER. PATCHY DENSE FOG MAY OCCUR NEAR THE COAST ON SUNDAY
AND MONDAY MORNINGS. HIGH PRESSURE WILL STRENGTHEN OVER THE AREA
INTO NEXT WEEK, BRINGING HIGHER TEMPERATURES AND STRONGER OFFSHORE
WINDS. SANTA ANA WINDS WILL STRENGHTEN ACROSS THE REGION FOR MONDAY
AND TUESDAY WITH WEAK TO LOCALLY MODERATE STRENGTH EXPECTED. THE
AREA OF HIGH PRESSURE LOOKS TO STICK AROUND INTO THE END OF THE
WEEK, KEEPING OUR WEATHER PATTERN WARM AND DRY AS WE MOVE INTO THE
MIDDLE OF THE MONTH.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
VARIABLE HIGH CLOUDS BUT NO LOW CLOUDS AGAIN THIS EVENING. SFC
PRESSURE GRADIENTS REMAIN WEAKLY OFFSHORE AND WINDS ARE MOSTLY
LIGHT WITH NO LOCATIONS REPORTING GUSTS OVER 20 MPH IN THE LAST
HOUR. TEMPERATURES ARE GENERALLY A LITTLE LOWER THAN AT THIS TIME
YESTERDAY WEST OF THE MTNS, AND A LITTLE HIGHER IN THE MTNS AND
DESERTS.
FROM PREVIOUS DISCUSSION...
THE PRESSURE GRADIENT WILL WEAKEN FURTHER AND TURN ONSHORE FOR
SATURDAY, LEADING TO SIMILAR TEMPERATURES TO THOSE OF TODAY. THIS
SLOW ONSHORE PUSH WILL BRING MORE HUMID AIR ASHORE, LEADING TO A
BETTER CHANCE OF FOG NEAR THE COAST BY SATURDAY NIGHT INTO SUNDAY
MORNING. SOME OF THE FOG MAY BE DENSE (NEAR 1/4 - 1/2 MILE
VISIBILITY AT TIMES), WHICH MAY IMPACT AIRPORT TRAVEL. AN AREA OF
HIGH PRESSURE CURRENTLY OFF THE COAST, WILL BEGIN TO EXPAND
EASTWARD OVER OUR REGION FOR SUNDAY INTO EARLY NEXT WEEK. DUE TO
THIS, SUNDAY WILL BE THE BEGINNING OF A WARMING TREND ACROSS
SOUTHERN CALIFORNIA. THE GREATEST WARMING WILL BE FELT OF THE
LOWER DESERTS AND VALLEYS WEST OF THE MOUNTAINS WITH HIGHS
REACHING INTO THE UPPER 70S.
THE HIGH EXPANDS FURTHER EASTWARD OVER THE AREA BY MONDAY. MODELS
SEEM TO HAVE LESS OF A HANDLE ON ANY FOG DEVELOPMENT ON THIS DAY,
BUT THE QUESTION IS WHETHER THE MARINE LAYER WILL BE DEEP ENOUGH
FOR ANOTHER DAY OF DENSE FOG. OFFSHORE FLOW WILL STRENGTHEN FOR MONDAY
INTO TUESDAY. CONFIDENCE HAS INCREASED SLIGHTLY FROM PREVIOUS
FORECASTS, WITH A WEAK TO LOCALLY MODERATE OFFSHORE WIND EVENT
BECOMING INCREASINGLY LIKELY. WINDS WERE ADJUSTED UP SOMEWHAT
ACROSS THE REGION DURING THIS TIME TO REFLECT THIS INCREASING
CONFIDENCE IN WIDESPREAD WIND GUSTS NEAR 25-35 MPH, LOCALLY NEAR
45 MPH IN THE MOUNTAINS. WIND SPEEDS AND OVERALL DIRECTION WILL
BECOME MORE CLEAR IN THE COMING DAYS AS WE CONTINUE TO FORECAST
THE EXACT PLACEMENT OF THE AREA OF HIGH PRESSURE NEAR THE REGION.
NBM CHANCES FOR HIGH TEMPERATURES OVER 85 DEGREES INCREASE TO
20-50% BY TUESDAY THROUGH FRIDAY OF NEXT WEEK. THERE IS HIGHER
CONFIDENCE THAT MANY VALLEY WEST OF THE MOUNTAINS AND LOWER
DESERTS TO SEE HIGHS IN THE 80S, WHICH WOULD BE 10-15 DEGREES
ABOVE NORMAL. WEAK OFFSHORE FLOW WILL PREVAIL DURING THIS PERIOD
AS WELL. THE OFFSHORE PATTERN AND THE HIGH'S POSITION OVER THE
AREA WILL GIVE A MORE DETAILED TEMPERATURE FORECAST IN THE COMING
DAYS. LOW TEMPERATURES WILL ALSO BE ABOVE AVERAGE, SO NOT AS
CHILLY OUT THERE AS WELL. THE AREA OF HIGH PRESSURE WILL LIKELY
STICK AROUND THROUGH MUCH OF NEXT WEEK, WITH SLIGHT VARIATIONS ON
ITS STRENGTH AND LOCATION BY NEXT WEEKEND. WHATEVER THE EXACT
OUTCOME, EXPECT WARM AND DRY WEATHER AS WE GO INTO THE MIDDLE OF
THE MONTH.
AVIATION
060330Z....MOSTLY CLEAR SKIES AND VFR CONDITIONS ARE EXPECTED
THROUGH SAT EVENING. 30-40% CHANCE PATCHY FG AT THE IMMEDIATE
COASTLINE AND OVER NEARSHORE WATERS AFTER 03Z SUN.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH WEDNESDAY.
BEACHES
VERY HIGH TIDES CONTINUE EACH MORNING THOUGH THIS WEEKEND.
OTHERWISE, NO BEACH HAZARDS EXPECTED THROUGH WEDNESDAY.
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/BEACHES...KW
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