937
FXUS66 KSGX 311153
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
436 AM PDT MON AUG 31 2026
SYNOPSIS
THERE WILL BE COOLING AND DRYING FOR INLAND AREAS FOR EARLY THIS
WEEK WITH HIGH TEMPERATURES COOLING TO AROUND 5 DEGREES BELOW
AVERAGE FOR INLAND AREAS ON WEDNESDAY. SOUTHWEST TO WEST WINDS FOR
THE MOUNTAINS AND DESERTS DURING THE AFTERNOON AND EVENING WILL
GUST TO 25 TO 35 MPH THROUGH MID WEEK. FOR NEXT WEEKEND, THERE
COULD BE SOME INFLUX OF MONSOONAL AND POSSIBLY TROPICAL MOISTURE
FROM AN AREA OF DISTURBED WEATHER WELL TO THE SOUTH OF THE
SOUTHERN TIP OF BAJA THAT MAY DEVELOP THIS WEEK AND TRACK TOWARDS
THE NORTHWEST.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION DISCUSSION
SHORT TERM (TODAY THROUGH WEDNESDAY)
THE COOLING TREND WILL CONTINUE THROUGH WEDNESDAY WITH HIGH
TEMPERATURES ON WEDNESDAY AROUND 5 DEGREES BELOW AVERAGE FOR
INLAND AREAS. HIGH TEMPERATURES ON WEDNESDAY WILL RANGE FROM THE
MID TO UPPER 70S NEAR THE COAST TO THE MID 80S TO LOWER 90S FOR
THE INLAND EMPIRE WITH 100 TO 104 FOR THE LOWER DESERTS. PATCHY
NIGHT AND MORNING LOW CLOUDS WILL SPREAD INTO PORTIONS OF THE
WESTERN VALLEYS. ONSHORE FLOW WILL BE STRONGER WITH SOUTHWEST TO
WEST WINDS FOR THE DESERTS ONTO THE DESERT SLOPES OF THE MOUNTAINS
DURING THE AFTERNOON AND EVENING GUSTING TO 25 TO 35 MPH.
LONG TERM (THURSDAY THROUGH SUNDAY)
LOW PRESSURE WILL BE CENTERED IN THE VICINITY OF THE WEST COAST
FROM THE PACIFIC NORTHWEST INTO CALIFORNIA WITH HIGH PRESSURE OVER
THE CENTRAL STATES EXTENDING WESTWARD INTO NORTHWEST MEXICO. AN
AREA OF DISTURBED WEATHER WELL TO THE SOUTH OF THE SOUTHERN TIP OF
BAJA MAY DEVELOP THIS WEEK AND TRACK TOWARDS THE NORTHWEST.
DEPENDING ON THE DEVELOPMENT AND TRACK, THERE COULD BE SOME INFLUX
OF AT LEAST MONSOONAL MOISTURE INTO PORTIONS OF SOUTHERN
CALIFORNIA FOR NEXT WEEKEND, BUT MORE DIRECT IMPACTS FROM A
DECAYING TROPICAL CYCLONE ARE LESS LIKELY WITH SUPPORT OF LESS
THAN 5 PERCENT OF ENSEMBLE SOLUTIONS.
AVIATION
311130Z...COASTS/VALLEYS...LOW CLOUDS BASED AT 1500-1900 FEET MSL
WILL COVER MOST COASTAL AREAS AND EXTEND INTO PARTS OF INLAND
VALLEYS THIS MORNING. VIS REDUCED 0-5SM ALONG INLAND EDGE OF CLOUDS.
SCATTER OUT EXPECTED BY 15-17Z. PATCHIER LOW CLOUDS WITH SIMILAR
BASES AND VIS WILL REDEVELOP AFTER 04Z WITH SIMILAR EXTENT, BUT
SPOTTIER COVERAGE.
MOUNTAINS/DESERTS
MOSTLY CLEAR SKIES TODAY AND TONIGHT. BREEZY
WESTERLY WINDS MAINLY THROUGH MOUNTAIN PASSES AND DESERT SLOPES 21-
07Z. GUSTS 25-40 KTS WITH POCKETS OF UP/DOWNDRAFTS OVER AND IN LEE
OF RIDGES.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH FRIDAY, EXCEPT
FOR GUSTS AROUND 20 KNOTS EXPECTED EACH AFTERNOON THROUGH THURSDAY
IN THE VICINITY OF SAN CLEMENTE ISLAND.
BEACHES
A SOUTHERLY SWELL FROM HURRICANE KARINA WILL MAINTAIN ELEVATED SURF
ON SOUTH AND SOUTHWEST FACING BEACHES WITH SETS UP TO 6 FEET TODAY
AND 5 FEET TUESDAY. SWELLS FROM TROPICAL CYCLONES WILL CONTINUE
TO ARRIVE MUCH OF THIS WEEK.
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/BEACHES...MM
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