887
FXUS66 KSGX 031838
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1138 AM PDT SUN MAY 3 2026
SYNOPSIS
A LOW PRESSURE SYSTEM WILL APPROACH THE REGION, BRINGING COOLER
AND BREEZIER WEATHER, ALONG WITH A CHANCE OF LIGHT RAINFALL
THROUGH TUESDAY. A DEEPENING MARINE LAYER COULD BRING PATCHY
DRIZZLE TO PORTIONS OF THE COASTAL AREAS AND INLAND VALLEYS AGAIN
TONIGHT INTO MONDAY MORNING. THE BEST CHANCE FOR LIGHT RAIN
SHOWERS WILL BE ALONG AND WEST OF THE MOUNTAINS MONDAY EVENING
INTO TUESDAY MORNING. DRY AND WARMER WEATHER IS EXPECTED BY
WEDNESDAY INTO NEXT WEEKEND.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (THROUGH TUESDAY)
A CUTOFF LOW CONTINUES TO TUMBLE CLOSER TO THE CALIFORNIA COAST
TODAY, BRINGING A DEEP MARINE LAYER, COOLER WEATHER AND INCREASED
WINDS ACROSS THE MOUNTAINS AND DESERTS. WINDS ARE CURRENTLY NEAR
20-35 MPH ACROSS THESE REGIONS AND WILL INCREASE THIS AFTERNOON
INTO THE EVENING CLOSER TO 35-45 MPH. WINDS LOOK TO CONTINUE TO BE
GUSTY INTO THE NIGHT WITH SLIGHTLY HIGHER WINDS BY MONDAY
AFTERNOON AND EVENING, WHERE GUSTS WILL LOCALLY REACH ABOVE 55 MPH
IN SOME MOUNTAIN PASSES IN THE RIVERSIDE AND SAN DIEGO COUNTIES.
HIGH PROFILE VEHICLES WILL SEE INCREASED RISK OF INCIDENTS IN
WINDY CONDITIONS AND BLOWING SAND/DUST.
THE MARINE LAYER IS AROUND 5,000 FEET THICK, COVERING MUCH OF THE
COASTAL BASIN AND EVEN REACHING INTO THE TOP OF THE CAJON PASS.
CLOUDS WILL PARTIALLY CLEAR AREAS THIS AFTERNOON, BUT OTHER AREAS
WILL REMAIN UNDER THE CLOUDS THROUGHOUT THE DAY AS THE LOW CLOUDS
RESURGES BACK INLAND BY LATER THIS AFTERNOON/EVENING. JUST LIKE
THIS MORNING, AREAS NEAR THE COAST MAY SEE SOME MARINE LAYER
DRIZZLE/LIGHT SHOWERS OVERNIGHT INTO MONDAY MONDAY MORNING AS THE
MARINE LAYER REMAINS QUITE SATURATED. THE AREA OF LOW PRESSURE
WILL MOVE CLOSER TO THE REGION BY MONDAY INTO TUESDAY, BRINGING AN
INCREASED CHANCE OF LIGHT SHOWERS FROM THE COAST TO THE MOUNTAINS.
HI-RES MODELS ARE IN PRETTY FAIR AGREEMENT ON THE TIMING OF THE
LIGHT SHOWERS TO BEGIN AROUND MONDAY EVENING, BECOMING MORE
WIDESPREAD OVERNIGHT INTO TUESDAY MORNING. AREAS OF SAN DIEGO
COUNTY HAVE THE BEST CHANCE TO SEE RAINFALL. THE SHOWERS WILL BE
SCATTERED IN NATURE, WITH SOME AREAS SEEING OVER A QUARTER OF AN
INCH AND OTHERS MINIMAL TOTALS TO NONE. THE CORE OF LOW PRESSURE
SYSTEM MOVES TO THE EAST LATER ON TUESDAY, WHERE RESIDUAL SHOWERS
MAY LINGER ACROSS THE MOUNTAINS INTO THE AFTERNOON WITH PARTIAL
CLEARING CLOSER TO THE COAST.
THIS SYSTEM WILL ALSO BRING MUCH COOLER WEATHER. MONDAY AND
TUESDAY WILL BE THE COOLEST DAYS OF THE UPCOMING WEEK WITH
HIGHS ONLY REACHING THE 40S TO NEAR 50 DEGREES IN THE MOUNTAINS
AND HIGHS IN THE 60S FOR AREAS WEST OF THE MOUNTAINS INTO THE
HIGH DESERT. COMFORTABLE 70S WILL TAKE HOLD ACROSS THE ANZA
BORREGO DESERT INTO THE PALM SPRINGS AREA.
LONG TERM (WEDNESDAY INTO NEXT WEEKEND)
THE AREA OF LOW PRESSURE EXITS THE REGION BY THE MIDDLE OF THE
WEEK, WHERE WEDNESDAY BECOMES A TRANSITION DAY. DRIER WEATHER WITH
TEMPERATURES NEAR AVERAGE CAN BE EXPECTED. HIGH PRESSURE OFF THE
COAST WILL GROW AND EXPAND BY THURSDAY INTO THE END OF THE WEEK.
THIS WILL BRING MUCH WARMER WEATHER TO THE AREA WITH HIGHS NEAR 10
DEGREES ABOVE NORMAL AWAY FROM THE COAST. CHANCES TO REACH 90
DEGREES INCREASE NEAR 25-50% ACROSS THE INLAND EMPIRE BY THURSDAY;
INCREASING BY FRIDAY. THE LOW DESERTS WILL REACH THE 100 DEGREE
MARK POSSIBLY BY THURSDAY, DEFINITELY BY FRIDAY. 70S AND 80S WILL
DOMINATE THE COAST AND VALLEY REGIONS OF ORANGE AND SAN DIEGO
COUNTIES. MODELS CONTINUE TO KEEP THE RIDGE OVER THE REGION FOR
THE FORESEEABLE FUTURE.
AVIATION
031755Z....COAST/VALLEYS...BKN-OVC LOW CLOUDS BASED 2000-3000
FT MSL WITH LAYERS ABOVE TO NEAR 5000 FT MSL. TOPS LOCALLY 6000 FT
MSL. COULD BE SOME BRIEF SCT-BKN AT THE COAST MID AFTERNOON BEFORE
THE LOW CLOUDS SOLIDIFY AGAIN. -RA/-DZ DEVELOPING BY 04Z
SUNDAY NIGHT.
MOUNTAINS/DESERTS
COASTAL SLOPES OBSCURED BLO 6000 FT MSL IN
-RA/-DZ. DESERT SLOPES SCT-BKN HIGH CLOUDS AOA 20 KFT. WINDS
STRENGTHEN ALONG DESERT SLOPES AND INTO DESERTS STARTING AFTER 21Z
SUN. WIDESPREAD GUSTS 25-35 KTS EXPECTED SUNDAY EVENING AND
OVERNIGHT, LOCALLY REACHING 45-50 KTS ALONG DESERT SLOPES AND
THROUGH MOUNTAIN PASSES.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH THURSDAY.
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...APR
AVIATION/MARINE...SMALL
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