693
FXUS66 KSGX 131142
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
342 AM PST TUE JAN 13 2026
SYNOPSIS
PERIODS OF GUSTY SANTA ANA WINDS WILL CONTINUE INTO THURSDAY WITH
WARMER HIGH TEMPERATURES THROUGH WEDNESDAY. FOR THURSDAY THROUGH
SATURDAY, THERE WILL BE SLIGHT DAY TO DAY DIFFERENCES IN HIGH
TEMPERATURES FOLLOWED BY A COOLING TREND FOR SUNDAY INTO THE
MIDDLE OF NEXT WEEK. NIGHT AND MORNING COASTAL LOW CLOUDS AND FOG
COULD RETURN AS SOON AS LATE THURSDAY NIGHT.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH THURSDAY)
HIGH PRESSURE ALOFT WILL REMAIN CENTERED ACROSS NORTHERN
CALIFORNIA WITH WEAK TO MODERATE OFFSHORE LOWER-LEVEL FLOW ACROSS
SOUTHERN CALIFORNIA. PERIODS OF GUSTY SANTA ANA WINDS WILL WILL
CONTINUE ALONG AND BELOW THE COASTAL SLOPES OF THE MOUNTAINS INTO
THURSDAY. HIGH TEMPERATURES WILL WARM FOR TODAY AND WEDNESDAY WITH
THE GREATEST WARMING FOR THE MOUNTAINS AND VALLEYS. HIGH
TEMPERATURES ON WEDNESDAY WILL BE AS MUCH AS 12 TO 18 DEGREES
ABOVE AVERAGE FOR THE INLAND VALLEYS WITH HIGH TEMPERATURES
RANGING FROM THE LOWER 70S NEAR THE COAST TO THE UPPER 70S TO MID
80S FOR THE VALLEYS WITH THE LOWER 80S FOR THE LOWER DESERTS. HIGH
TEMPERATURES FOR INLAND AREAS WILL COOL A DEGREE OR TWO ON
THURSDAY.
LONG TERM (FRIDAY THROUGH MONDAY)
WEAK ONSHORE FLOW WILL RETURN NEAR THE COAST WITH SOME RETURN OF
COASTAL LOW CLOUDS AND FOG POSSIBLE AS SOON AS LATE THURSDAY
NIGHT OVER THE COASTAL WATERS AND ADJACENT COASTAL AREAS WITH
NIGHT AND MORNING LOW CLOUDS AND FOG FOR COASTAL AREAS CONTINUING
THROUGH THE WEEKEND INTO EARLY NEXT WEEK. NOT MUCH CHANGE IN HIGH
TEMPERATURES IS EXPECTED FOR FRIDAY AND SATURDAY. COOLING WILL
BEGIN TO SPREAD INLAND ON SUNDAY AND MONDAY WITH HIGH TEMPERATURES
FOR THE VALLEYS STILL 8 TO 12 DEGREES ABOVE AVERAGE ON MONDAY, IN
THE MID TO UPPER 70S.
IT APPEARS THAT BY THE MIDDLE OF NEXT WEEK, HIGH PRESSURE ALOFT
THAT HAS BEEN ANCHORED ALONG THE WEST COAST WILL REDEVELOP FARTHER
OFF THE COAST, SOMEWHERE ALONG 140W LONGITUDE BY AROUND WEDNESDAY
OF NEXT WEEK WITH LOW PRESSURE DEVELOPING NEAR THE WEST COAST.
HOWEVER, THERE REMAIN WIDE MODEL DIFFERENCES IN JUST HOW AND WHEN
THIS WILL HAPPEN. THERE SHOULD BE GREATER INLAND COOLING BY THE
MIDDLE OF NEXT WEEK WITH AT LEAST SOME CHANCE FOR PRECIPITATION
RETURNING DURING THE MIDDLE OR LATTER PORTION OF NEXT WEEK. NBM
CHANCES FOR MEASURABLE PRECIPITATION FOR THE COAST TO THE
MOUNTAINS SLOWLY INCREASES FROM 5 PERCENT ON TUESDAY TO 15 PERCENT
ON WEDNESDAY AND 25 PERCENT ON THURSDAY.
AVIATION
131030Z...MOSTLY CLEAR SKIES AND VFR CONDITIONS TODAY AND
TONIGHT. EAST TO NORTHEAST WINDS 20-30 KTS WITH ISOLATED GUSTS TO
40 KTS IN FOOTHILLS AND ADJACENT VALLEYS. PERIODS OF LLWS WITH MOD
UP/DOWNDRAFTS IN LEE OF MOUNTAINS (INCLUDING KSNA) THROUGH 16Z.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH SATURDAY.
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...17
AVIATION/MARINE...MM
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