481
FXUS66 KSGX 101021
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
221 AM PST SAT JAN 10 2026
SYNOPSIS
MODERATE TO LOCALLY STRONG SANTA ANA WINDS WILL CONTINUE ALONG
THE COASTAL MOUNTAIN SLOPES, FOOTHILLS, AND INTO THE VALLEYS
THROUGH MONDAY. PERIODS OF WEAKER SANTA ANA WINDS WILL CONTINUE
THROUGH THE REMAINDER OF NEXT WEEK. A WARMING TREND DEVELOPS THIS
WEEKEND, WITH TEMPERATURES PEAKING AROUND THE MIDDLE OF NEXT
WEEK. WEDNESDAY AND THURSDAY WILL LIKELY BE THE WARMEST DAYS.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SANTA ANA WINDS ARE PEAKING THIS MORNING IN SAN DIEGO COUNTY AS
MORE EASTERLY MID-LEVEL FLOW AND LOCAL DENSITY GRADIENTS ALIGN
WITH THE OFFSHORE PRESSURE GRADIENTS. IN THE LAST HOUR, THE SENSOR
AT BIG BLACK MOUNTAIN REPORTED A WIND GUST OF 82 MPH. SEVERAL
OTHER LOCATIONS - MOSTLY IN SAN DIEGO COUNTY - REPORTED WIND GUSTS
EXCEEDING 55 MPH. THE FAVORABLE MID-LEVEL FLOW WILL CONTINUE
THROUGH SUNDAY AS A SHORTWAVE EMBEDDED IN THE MEAN TROUGH TO THE
EAST WILL DEEPEN TO THE SOUTHWEST, FORMING A CLOSED UPPER LOW OVER
CENTRAL BAJA BY SUNDAY MORNING. WE CAN EXPECT ANOTHER PEAK IN THE
OFFSHORE WINDS SUNDAY MORNING BUT IT LIKELY WON'T BE AS STRONG AS
THIS MORNING. WEAKENING OFFSHORE PRESSURE GRADIENTS AND WEAKENING
SUPPORT ALOFT WILL RESULT IN PERSISTENT BUT WEAKER SANTA ANA WINDS
FOR MONDAY THROUGH NEXT WEEK.
SOCAL WILL EFFECTIVELY BE IN THE MIDDLE OF A REX BLOCK FOR MUCH
OF THE COMING WEEK, WITH AN UPPER LOW TO THE SOUTH AND A HIGH TO
THE NORTH. ALTHOUGH, AFTER MONDAY, THE MODEL SOLUTIONS BEGIN TO
DIVERGE WITH RESPECT TO THE EVOLUTION OF THE SYSTEMS. ALTHOUGH
DETAILS BECOME MORE UNCERTAIN OVER TIME, WE CAN SAY WITH SOME
CONFIDENCE THAT IN ADDITION TO THE SANTA ANA WINDS, TEMPERATURES
WILL STEADILY RISE, PEAKING NEXT WEDNESDAY AND THURSDAY. ON THOSE
DAYS, WE WILL LIKELY SEE DAYTIME TEMPERATURES REACH THE LOW 80S IN
PORTIONS OF THE INLAND VALLEYS. ACROSS THE REGION, TEMPERATURES
WILL RANGE FROM 5-10 DEGREES ABOVE SEASONAL AVERAGES NEAR THE
COAST TO AS MUCH AS 15 DEGREES ABOVE AVERAGE IN THE INLAND
VALLEYS. EVEN THE DESERTS WILL BE AS MUCH AS 9-11 DEGREES ABOVE
AVERAGE.
TEMPERATURES MAY TREND A LITTLE LOWER AS N WINDS WEAKER AS WE
APPROACH NEXT WEEKEND BUT THE DRY AND WARM WEATHER WILL CONTINUE.
AT THIS TIME, IT'S DIFFICULT TO SEE IF OR WHEN WE WILL SEE A
RETURN OF ANY MARINE LAYER CLOUDS.
AVIATION
101015Z...COAST/VALLEYS/MOUNTAINS...MOSTLY CLEAR SKIES PREVAILING.
NORTHEAST AND EAST WINDS GUSTING GENERALLY 35-50 KTS ALONG COASTAL
SLOPES. GUSTS LOCALLY REACHING 60 KTS OR HIGHER ALONG COASTAL SLOPES
IN SAN DIEGO COUNTY AFTER 15Z SAT. GUSTS 25-40 KTS DOWNWIND OF THE
CAJON/BANNING PASSES IN THE INLAND EMPIRE AND INTO PARTS OF INLAND
ORANGE COUNTY AND THE SAN DIEGO VALLEYS. PERIODS OF LLWS AND
MODERATE UP AND DOWNDRAFTS DOWNWIND OF COASTAL SLOPES (I.E. KONT,
KSNA, KSBD). OFFSHORE WIND PATTERN CONTINUES THROUGH THE REMAINDER
OF THE WEEKEND.
DESERTS...VFR CONDITIONS THROUGH THE PERIOD. ELEVATED NORTHEAST
WINDS STAYING MOSTLY CONFINED TO MOUNTAIN SLOPES WITH GUSTS 20-30
KTS.
MARINE
NORTHEAST TO EAST WINDS WILL OCCASIONALLY GUST TO 20 TO 25 KNOTS
THROUGH THIS WEEKEND. OTHERWISE, NO HAZARDOUS MARINE CONDITIONS
EXPECTED THROUGH WEDNESDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...WIND ADVISORY UNTIL 1 PM PST SUNDAY FOR ORANGE COUNTY INLAND
AREAS-RIVERSIDE COUNTY MOUNTAINS-SAN BERNARDINO AND
RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-SAN DIEGO COUNTY
VALLEYS-SANTA ANA MOUNTAINS AND FOOTHILLS.
HIGH WIND WARNING UNTIL 1 PM PST SUNDAY FOR SAN BERNARDINO
COUNTY MOUNTAINS-SAN DIEGO COUNTY MOUNTAINS-SAN GORGONIO
PASS NEAR BANNING.
PZ...NONE.
PUBLIC...PG
AVIATION/MARINE...KW
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page