379
FXUS66 KSGX 180025
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
525 PM PDT SUN MAY 17 2026
SYNOPSIS
COOLER WEATHER PERSISTS THROUGH THE WEEKEND, WITH A DEEPER, MORE
PERSISTENT MARINE LAYER AND NIGHT AND MORNING COASTAL LOW CLOUDS
EXTENDING WELL INLAND AND ONTO THE COASTAL SLOPES OF THE
MOUNTAINS. SOUTHWEST TO WEST WINDS FOR THE MOUNTAINS AND DESERTS
WILL GUST TO 40 TO 50 MPH THROUGH SUNDAY, WITH ISOLATED GUSTS TO
65 MPH. GRADUALLY WARMER, DRY WEATHER WITH GENERALLY WEAK WINDS
WILL FOLLOW MONDAY THROUGH THURSDAY, FOLLOWED BY A SLIGHT
COOLDOWN FROM THURSDAY INTO FRIDAY.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH TOMORROW NIGHT)
GUSTY WINDS WILL CONTINUE THROUGH THE DAY TODAY AND THROUGH THIS
EVENING AS LOW PRESSURE BRINGS WINDS FROM THE WEST OVER THE AREA. AS
LOW PRESSURE SHIFTS FURTHER EAST, WINDS WILL EASE THROUGH MONDAY.
STRONGEST WINDS ARE IN THE DESERTS, DESERT MOUNTAIN SLOPES AND
MOUNTAIN PASSES WITH GUSTS UP TO 45 TO 55 MPH, LOCALLY UP TO 60 MPH.
HIGHS TODAY AND MONDAY WILL BE NEAR TO JUST BELOW AVERAGE FOR MUCH
OF THE AREA. THE EXCEPTION BEING SOME AREAS IN THE RIVERSIDE AND SAN
BERNARDINO COUNTY MOUNTAINS WITH HIGHS 5 TO 10 DEGREES BELOW AVERAGE.
LOW CLOUDS FROM THE MARINE LAYERS INFLUENCE WILL STICK AROUND
THROUGH THE DAY TODAY AND ARE EXPECTED TO CLEAR MONDAY MORNING.
LONG TERM (TUESDAY THROUGH SUNDAY)
AS WINDS SHIFT TO OFF SHORE TUESDAY, LOW CLOUDS WILL STICK CLOSER TO
THE COAST, GIVING US SOME MUCH NEEDED SUNSHINE IN THE AFTERNOONS AT
LEAST THROUGH MID-WEEK. TEMPERATURES INCREASE AREA WIDE TUESDAY,
WITH DAILY HIGHS CONTINUING TO INCREASE THROUGH THE WEEK, PEAKING
THURSDAY AFTERNOON. TEMPERATURES THURSDAY WILL BE UP TO 5 DEGREES
WARMER THAN AVERAGE OVER MOST OF THE AREA. THE HIGH DESERTS WILL SEE
TEMPERATURES 5-10 DEGREES ABOVE AVERAGE.
AVIATION
180000Z...COAST/VALLEYS...SCT-BKN CLOUDS 3000-4500FT AGL IN PLACE
ACROSS INLAND VALLEYS THROUGH THE COASTAL MOUNTAIN SLOPES.
MEANWHILE, LOWER MARINE LATER CLOUDS WITH CIGS AROUND 2200-2800FT
MSL HAVE BEEN FILLED BACK IN ACROSS COASTAL SAN DIEGO COUNTY WITH
CLEAR SKIES PREVAILING FOR THE ORANGE COUNTY COASTAL AREAS. THERE IS
A WINDOW AROUND 04-08Z MONDAY FOR CIGS TO REACH KSNA, BEFORE THE
ARRIVAL OF OFFSHORE WINDS ALOFT START TO FIGHT BACK. CONFIDENCE IS
LOWER ON THE EVOLUTION OF THE CIGS FOR SAN DIEGO COUNTY, AS A
COASTAL EDDY (LIKELY WEAKER THAN LAST NIGHT) WILL BATTLE WITH THE
OFFSHORE WINDS. CURRENTLY EXPECTING THE MVFR CIGS TO BECOME MORE SCT-
BKN BY 09-12Z, BEFORE BEING SWEPT OUT COMPLETELY BY 15-17Z, WITH
CLEAR SKIES INTO MONDAY AFTERNOON. N/NE GUSTS UP TO 20 KTS EXPECTED
BELOW MOUNTAIN PASSES, LIKELY REACHING KONT BY 15Z.
MOUNTAINS/DESERTS...GUSTY NORTH TO NORTHWEST WINDS WITH WIDESPREAD
30-40 KNOT SURFACE GUSTS EXPECTED IN THE DESERTS, LOCALLY UP 60
KNOTS IN VULNERABLE MOUNTAIN PASSES SUCH AS THE SAN GORGONIO PASS.
MOD UP/DOWNDRAFTS AND LOCAL LLWS IN LEE OF MOUNTAINS AS WELL AS
LOCALIZED VIS REDUCTIONS TO 4-6SM EXPECTED, ESPECIALLY DURING
PERIODS OF STRONG GUSTS. WINDS WEAKEN AFTER 10Z MON.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH FRIDAY.
BEACHES
A WESTERLY SWELL FROM 290 DEGREES WITH A 9 TO 10 SECOND PERIOD IS
BRINGING ELEVATED SURF OF 4 TO 6 FEET THROUGH MONDAY MORNING.
HIGHEST SURF ON 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.
SGX WATCHES/WARNINGS/ADVISORIES
CA...BEACH HAZARDS STATEMENT THROUGH MONDAY MORNING FOR ORANGE COUNTY
COASTAL AREAS-SAN DIEGO COUNTY COASTAL AREAS.
WIND ADVISORY UNTIL 3 AM PDT MONDAY FOR APPLE AND LUCERNE
VALLEYS-RIVERSIDE COUNTY MOUNTAINS-SAN BERNARDINO COUNTY
MOUNTAINS-SAN DIEGO COUNTY DESERTS-SAN DIEGO COUNTY
MOUNTAINS-SAN GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...CO
AVIATION/MARINE/BEACHES...MUNYAN
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