294
FXUS66 KSGX 151803
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1103 AM PDT FRI MAY 15 2026
SYNOPSIS
SLIGHT INLAND WARMING FOR TODAY, THEN COOLER FOR THE WEEKEND FOR
INLAND AREAS WITH STRONGER ONSHORE FLOW. THE MARINE LAYER WILL
DEEPEN DURING THE WEEKEND WITH NIGHT AND MORNING COASTAL LOW
CLOUDS EXTENDING WELL INLAND AND ONTO THE COASTAL SLOPES OF THE
MOUNTAINS. FOR SATURDAY AFTERNOON INTO SUNDAY EVENING, SOUTHWEST
TO WEST WINDS FOR THE MOUNTAINS AND DESERTS WILL GUST TO 40 TO 50
MPH WITH ISOLATED GUSTS TO 65 MPH. THE COAST AND VALLEYS WILL
WARM ON MONDAY WITH THE GREATER WARMING FOR INLAND AREAS FOR
TUESDAY THROUGH THURSDAY.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION/MARINE/BEACHES DISCUSSION
SHORT TERM (TODAY THROUGH SUNDAY)
HIGH TEMPERATURES FOR THE DESERTS WILL WARM A FEW DEGREES TODAY
WITH NOT MUCH CHANGE ELSEWHERE. THE MARINE LAYER WILL CONTINUE TO
DEEPEN EARLY THIS MORNING WITH COASTAL LOW CLOUDS EXTENDING ONTO
THE LOWER COASTAL SLOPES OF THE MOUNTAINS THIS MORNING.
FOR THE WEEKEND, ONSHORE FLOW WILL STRENGTHEN ACROSS SOUTHERN
CALIFORNIA. THE MARINE LAYER WILL CONTINUE TO DEEPEN THROUGH THE
WEEKEND WITH NIGHT AND MORNING COASTAL LOW CLOUDS EXTENDING WELL
INLAND AND ONTO THE COASTAL SLOPES OF THE MOUNTAINS. THERE WILL
BE PERIODS OF GUSTY SOUTHWEST TO WEST WINDS FOR THE MOUNTAINS AND
DESERTS FOR SATURDAY AFTERNOON INTO SUNDAY EVENING WITH GUSTS TO
40 TO 50 MPH AND WITH ISOLATED GUSTS TO 65 MPH.
WITH THE COOLING, HIGH TEMPERATURES FOR SUNDAY WILL BE AS MUCH AS
4 TO 8 DEGREES BELOW AVERAGE FOR THE MOUNTAINS AND INLAND VALLEYS.
FOR SUNDAY, HIGH TEMPERATURES WILL RANGE FROM THE MID TO UPPER 60S
NEAR THE COAST TO THE 70S FOR THE INLAND EMPIRE WITH THE UPPER 80S
TO MID 90S FOR THE LOWER DESERTS.
LONG TERM (MONDAY THROUGH THURSDAY)
THE COAST AND VALLEYS WILL WARM ON MONDAY WITH WINDS FOR THE
DESERTS BECOMING NORTHWESTERLY. FOR TUESDAY THROUGH THURSDAY, HIGH
TEMPERATURES FOR INLAND AREAS WILL WARM. HIGH TEMPERATURES ON
THURSDAY WILL BE WITHIN A FEW DEGREES OF AVERAGE FOR THE COAST AND
VALLEYS AND AROUND 4 TO 8 DEGREES ABOVE AVERAGE FOR THE DESERTS
AND LOWER ELEVATIONS OF THE MOUNTAINS. HIGH TEMPERATURES FOR
THURSDAY OF NEXT WEEK WILL RANGE FROM AROUND 70 NEAR THE COAST TO
THE UPPER 70S TO MID 80S FOR THE INLAND EMPIRE WITH THE UPPER 90S
TO 102 FOR THE LOWER DESERTS.
AVIATION
151800Z...COAST/VALLEYS...LOW CONFIDENCE IN COMPLETE CLEARING AT THE
IMMEDIATE COAST THIS AFTERNOON, ANY LINGERING CLOUDS WILL HAVE BASES
2000-3000 FT. LOW CLOUDS WILL PUSH BACK INLAND AFTER 01Z SAT AND
FILL IN THE COASTAL BASIN. BASES WILL BE 1500-2500 FT MSL, WITH THE
MOST LIKELY PLACES FOR THE BASES TO FALL BELOW 2000 FT ARE AT KCRQ
AND NEAR MTN FOOTHILLS (70 PERCENT). CHANCES OF VISIBILITY FALLING
BELOW 3SM IS AROUND 70 PERCENT NEAR MOUNTAIN FOOTHILLS. PATCHY -DZ
POSSIBLE FROM 09-18Z. SLOW CLEARING EXPECTED SAT AM WITH SCT
CONDITIONS MOST LIKELY AFTER 18Z FOR MOST LOCATIONS.
MOUNTAINS/DESERTS...ELEVATED WESTERLY WIND GUSTS 25-40 KT AFTER 21Z
TODAY WITH MOD UP/DOWNDRAFTS AND LOCAL LLWS IN LEE OF MOUNTAINS.
LOCALIZED AREAS OF BLDU AND REDUCED VIS. WINDS WILL REMAIN GUSTY
THROUGH MUCH OF SATURDAY. OTHERWISE, SKC AND VFR EXPECTED THROUGH
THE PERIOD.
MARINE
GUSTY WESTERLY WINDS WITH GUSTS 20-30 KT WILL DEVELOP IN THE OUTER
COASTAL WATERS LATE SATURDAY AFTERNOON. THE STRONGEST GUSTS WILL
OCCUR NEAR SAN CLEMENTE ISLAND. SEAS OF 8-11 FEET WITH A 9-12 SECOND
PERIOD WILL GENERATE CHOPPY SEAS. WINDS AND SEAS WILL DIMINISH
THROUGH THE DAY SUNDAY.
BEACHES
A WESTERLY SWELL FROM 290 DEGREES WITH A 9 TO 10 SECOND PERIOD WILL
BRING ELEVATED SURF OF 4 TO 6 FEET, SETS TO 7 FEET FOR SATURDAY
AFTERNOON THROUGH MONDAY MORNING. HIGHEST SURF AT WEST TO NORTHWEST
FACING BEACHES. THE COMBINATION OF ELEVATED SURF AND HIGH TIDES OF
6.5 TO 7 FEET WILL RESULT IN MINOR TIDAL OVERFLOW, ESPECIALLY FOR
BEACH PARKING LOTS AND BOARDWALKS. SURF WILL START TO DECREASE
MONDAY AFTERNOON.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...WIND ADVISORY FROM 11 AM SATURDAY TO 11 PM PDT SUNDAY FOR APPLE
AND LUCERNE VALLEYS-SAN BERNARDINO COUNTY MOUNTAINS.
WIND ADVISORY FROM 2 PM SATURDAY TO 11 PM PDT SUNDAY FOR
RIVERSIDE COUNTY MOUNTAINS-SAN DIEGO COUNTY DESERTS-SAN
DIEGO COUNTY MOUNTAINS-SAN GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...17
AVIATION/MARINE/BEACHES...CO
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