509
FXUS66 KSGX 261752
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1052 AM PDT SUN APR 26 2026
SYNOPSIS
COOL AND WINDY CONTINUES TODAY INTO EARLY TOMORROW WITH CHANCES
OF LIGHT PRECIPITATION, MAINLY OVER AND WEST OF THE MOUNTAINS.
WARMER EARLY THIS WEEK, THEN MINOR COOLING AND A SLIGHT CHANCE OF
PRECIPITATION TOWARDS THE MIDDLE OF THE WEEK. WARMER AND DRIER FOR
THE END OF THE WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
NEW AVIATION AND MARINE DISCUSSION...
TODAY THROUGH TOMORROW NIGHT...
SCATTERED SHOWERS CONTINUE TO DEVELOP THIS MORNING AND MOVE ONSHORE,
MOSTLY ACROSS SAN DIEGO COUNTY. WESTERLY WINDS HAVE BEEN QUITE
ELEVATED AND GUSTY ACROSS THE HIGHER TERRAIN, AND DESERTS. THESE
SHOWERS SHOULD BECOME MORE NUMEROUS BY LATER THIS EVENING AS ANOTHER
PERTURBATION EMBEDDED WITHIN THE LONGWAVE PROPAGATES OVER THE
REGION. THIS WILL ALSO HELP TO USHER IN COLDER TEMPERATURES, AS SNOW
LEVELS HAVE ALREADY DROPPED DOWN TO AROUND 5000 TO 5500 FEET. PLACES
ABOVE THIS ELEVATION, SUCH AS BIG BEAR, HAVE ALREADY PICKED UP A
COUPLE INCHES OF SNOW. GENERALLY SPEAKING, ADDITIONAL AMOUNTS OF
AROUND 0.10 INCHES OF RAIN OR LESS CAN BE EXPECTED, BUT THERE COULD
STILL BE A FEW AREAS WITH HIGHER AMOUNTS OF AROUND A QUARTER OF AN
INCH IN THE VICINITY OF PALOMAR MOUNTAIN THROUGH TOMORROW MORNING.
FOR TONIGHT INTO TOMORROW MORNING, SHOWERS WILL BEGIN TO TAPER OFF
AS HIGH PRESSURE CONDITIONS BEGIN TO BUILD BACK IN. WINDS WILL BEGIN
TO INCREASE AGAIN BY LATER THIS AFTERNOON, AND THERE COULD BE SOME
AREAS OF BLOWING DUST AS WELL FOR PORTIONS OF THE LOWER DESERTS,
NAMELY WITHIN THE COACHELLA VALLEY. FOR LATER IN THE DAY ON MONDAY,
CLEARING WILL CONTINUE AND ALLOW FOR SLIGHTLY WARMER TEMPERATURES IN
COMPARISON TO TODAY. THE MARINE LAYER WILL LIKELY REMAIN SOMEWHAT
DISPERSED THROUGH THE NEXT COUPLE OF DAYS.
TUESDAY THROUGH SATURDAY...
BY TUESDAY, HIGH PRESSURE WILL BRING ABOUT DRIER CONDITIONS WITH A
GRADUAL WARMING TREND AS THE MAIN ENERGY OF THE TROUGH SHIFTS
FURTHER EAST. THIS WILL ALSO ALLOW FOR THERE TO BE A CUT-OFF LOW
THAT DEVELOPS WELL TO OUR WEST OVER THE PACIFIC OCEAN. DEPENDING ON
THE TRACK, THIS COULD BRING A SLIGHT CHANCE OF
SHOWERS/THUNDERSTORMS, ESPECIALLY OVER THE MOUNTAINS. SOME OF THE
DETERMINISTIC MODELS HAVE THE POSITION OF THIS U/L LOW TRANSITIONING
JUST SOUTH OF OUR CWA BY LATER IN THE EVENING ON WEDNESDAY AND INTO
THURSDAY. DEPENDING ON WHICH MODEL RESOLVED THIS THE BEST WILL
DETERMINE HOW MUCH PRECIPITATION IS RECEIVED ACROSS THE REGION, AND
THIS CAN BE EVALUATED IN THE UPCOMING DAYS. IF THIS FEATURE TAKES
THIS TRACK, IT WILL GIVE US THE BEST CHANCE OF RECEIVING ANY
ADDITIONAL PRECIP BY THIS TIME, OTHERWISE DRIER CONDITIONS AND A
GRADUAL WARMING ARE EXPECTED TOWARDS THE END OF THE WEEK.
AVIATION
261745Z....COAST/VALLEYS...SCT-BKN LOW CLOUDS 2200-4500FT MSL AS
-SHRA CONTINUES TO MOVE ACROSS THE AREA, BECOMING MORE ISOLATED
THROUGH THE AFTERNOON. GUSTY SURFACE WINDS OUT OF THE WEST FOR MOST
LOCATIONS TODAY, WITH GUSTS UP TO 20-25KTS POSSIBLE THROUGH 06Z MON.
VCSH AFTER 20Z TODAY, ENDING BY 10Z MON FOR RIVERSIDE, ORANGE, AND
SAN BERNARDINO COUNTIES. VCSH/-SHRA POSSIBLE FOR SD COUNTY THROUGH
20Z MON.
MOUNTAINS/DESERTS
LIGHT PRECIPITATION FALLING IN THE
MOUNTAINS WITH INTERMITTENT SHSN ABOVE 6000-6500FT MSL. MTNS
SHROUDED IN FG; VIS 0-5SM IN FG/SHSN. GUSTY WEST WINDS WITH SURFACE
SPEEDS UP TO 20-30 KTS, LOCALLY HIGHER THROUGH MOUNTAIN PASSES AND
NEAR RIDGELINES, DYING DOWN BY 12Z MON. MOD TO STRONG UP/DOWNDRAFTS
NEAR PEAKS AND ON DESERT SLOPES. PERIODIC REDUCED VIS DUE TO BLDU.
MARINE
GUSTY WEST WINDS CLOSE TO 18-20 KTS EXPECTED INTERMITTENTLY THROUGH
THIS AFTERNOON WHICH MAY BE HAZARDOUS TO SMALL CRAFT. OTHERWISE, NO
HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH THURSDAY.
SGX WATCHES/WARNINGS/ADVISORIES
CA...WIND ADVISORY UNTIL 5 PM PDT THIS AFTERNOON FOR APPLE AND
LUCERNE VALLEYS-COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
SAN GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...PG
AVIATION/MARINE...ZUBER
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