452
FXUS66 KSGX 260954
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
254 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...
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
260600Z...MULTIPLE CLOUD DECKS, SCT-BKN 2200-5000FT FOR COASTAL AND
INLAND AREAS AND SCT-OVC 20,000-25,000FT MSL ACROSS THE ENTIRE
REGION. POCKETS OF -SHRA CONTINUE TO MOVE THROUGH THE COASTAL BASIN
REGION THROUGH THE OVERNIGHT HOURS, BECOMING LESS NUMEROUS FROM
NORTHWEST TO SOUTHEAST 12-16Z SUNDAY. PRECIPITATION BECOMES LARGELY
VCSH AFTER 16Z, BUT REMAINS POSSIBLE THROUGH THE END OF THE PERIOD.
LIGHT RAIN IS ALSO REACHING THE MOUNTAINS WITH INTERMITTENT SHSN
ABOVE 6000-6500 FT MSL. MTNS SHROUDED IN FG; VIS 0-5SM IN FG/SHSN.
WINDS HAVE LARGELY RELAXED WEST OF THE MOUNTAINS THIS EVENING, BUT
PERIODIC WIND GUSTS ABOVE 20KTS REMAIN POSSIBLE FOR DESERT MOUNTAIN
SLOPES INTO THE DESERT THROUGH THE OVERNIGHT HOURS. GUSTS PICK BACK
UP TO 20-30 KTS INTO THE DESERTS BY 18Z SUNDAY, WITH GUSTS 15-20 KTS
RETURNING TO THE COASTAL BASIN AFTER 18Z AS WELL. MOD TO STRONG
UP/DOWNDRAFTS NEAR PEAKS AND ON DESERT SLOPES TONIGHT AND SUNDAY.
PERIODIC REDUCED VIS DUE TO BLDU.
MARINE
GUSTY WEST WINDS CLOSE TO 18-20 KTS EXPECTED INTERMITTENTLY THROUGH
LATE SUNDAY MORNING WHICH MAY BE HAZARDOUS TO SMALL CRAFT.
OTHERWISE, NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH
WEDNESDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...WIND ADVISORY UNTIL 11 AM PDT THIS MORNING FOR APPLE AND LUCERNE
VALLEYS-COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-SAN
GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...STEWEY
AVIATION/MARINE...MUNYAN
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