366
FXUS66 KSGX 102007
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
107 PM PDT FRI APR 10 2026
SYNOPSIS
LOW PRESSURE SYSTEMS WILL IMPACT THE REGION THROUGH MONDAY. THESE
ARE GOING TO BE ACCOMPANIED BY COOLER, WETTER. AMD WINDIER
WEATHER. A CHANCE FOR LIGHT SHOWERS WILL OCCUR TONIGHT INTO
SATURDAY MORNING. THESE WEATHER SYSTEMS WILL ALSO BRING THE CHANCE
OF LIGHT TO MODERATE RAINFALL AND HIGH ELEVATION SNOW. THE
HEAVIEST RAINFALL AND MOUNTAIN SNOWFALL IS EXPECTED ON SUNDAY,
WHERE THERE IS A SLIGHT CHANCE OF THUNDERSTORMS WEST OF THE
MOUNTAINS. THIS LOW PRESSURE SYSTEM MAY LINGER OVER THE AREA INTO
MONDAY, BRINGING ADDITIONAL LIGHT SHOWERS. DRIER AND SLIGHTLY
WARMER WEATHER IS EXPECTED BY THE MIDDLE AND END OF NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
FAIR WEATHER CUMULUS CLOUDS ARE BEGINNING TO FORM THIS AFTERNOON
OUT AHEAD OF AN AREA OF LOW PRESSURE SITS JUST WEST OF THE
MONTEREY BAY. WINDS AS OF NOON ARE CURRENTLY GUSTING NEAR 25-40
MPH ACROSS SOME MOUNTAIN AREAS. THESE WINDS WILL SPREAD MORE INTO
THE DESERTS LATER THIS AFTERNOON AND EVENING. AS THE WEATHER
SYSTEM MOVES INLAND OVER NORTHERN CALIFORNIA LATER TODAY INTO
SATURDAY MORNING, A WEAK FRONTAL PASSAGE WILL MOVE OVER OUR
REGION. THIS WILL BRING THE CHANCE FOR LIGHT SHOWERS ALONG AND
WEST OF THE MOUNTAINS OVERNIGHT INTO SATURDAY MORNING. AMOUNTS
WILL BE LIGHT WITH SOME AREAS RECEIVING UP TO ONE TENTH OF AN
INCH, OTHERS NOTHING. COASTAL SLOPES OF THE MOUNTAINS MAY SEE
LOCALLY OVER ONE QUARTER OF AN INCH OF RAINFALL. AS THE LOW
PASSES, THIS WILL BRING IN COOLER AIR ACROSS THE REGION BY
SATURDAY WITH HIGHS NEAR 70 WEST OF THE MOUNTAINS AND HIGH DESERT
WITH HIGHS STAYING IN THE 80S ACROSS THE LOW DESERTS. SATURDAY
AFTERNOON AND EVENING LOOK TO BE MAINLY DRY WITH PARTLY TO MOSTLY
CLEAR SKIES.
A STRONGER AREA OF LOW PRESSURE IS BEGINNING TO EXIT THE GULF OF
ALASKA AND PUSH CLOSER TO THE WEST COAST TODAY. THIS SYSTEM WILL
CONTINUE TO DROP SOUTHWARD, IMPACTING THE AREA. THE LOW WILL BRING
CONTINUED WINDY CONDITIONS ACROSS THE MOUNTAINS AND DESERTS THIS
WEEKEND WITH HIGHEST WINDS EXPECTED ON SUNDAY WITH THE PASSAGE OF
THE SYSTEM'S COLD FRONT. SUNDAY WILL ALSO BE THE WINDIEST DAY AT
THE IMMEDIATE COAST WITH AROUND A 20-30% CHANCE OF SEEING WIND
GUSTS OVER 25 MPH IN THE MORNING AND AFTERNOON. MODELS INDICATE
THE WEATHER SYSTEM TAKING A SIMILAR PATH TO THE LOW PRESSURE
SYSTEM OF TODAY, FOCUSED ON NORTHERN CALIFORNIA. THIS SYSTEM WILL
BE LARGER HOWEVER, WHERE A MORE DEFINED COLD FRONT IS EXPECTED TO
MOVE THROUGH SOUTHERN CALIFORNIA. HIGH RESOLUTION MODELS BEGIN
LIGHT SHOWERS OUT AHEAD OF THE FRONT A BIT BEFORE MIDNIGHT SUNDAY,
BECOMING MORE WIDESPREAD IN NATURE SUNDAY MORNING. THE MAIN FRONT
LOOKS TO PASS THROUGH FROM NORTH TO SOUTH SUNDAY MORNING INTO THE
AFTERNOON HOURS. SNOW LEVELS WILL FALL AS LOW AS 5,000 FEET ON
SUNDAY NIGHT. TOTAL SNOWFALL ACCUMULATIONS WILL BE CLOSE TO ONE TO
TWO INCHES FOR AREAS ABOVE 6,000 FEET. THIS SYSTEM MAY BRING A
SLIGHT CHANCE OF THUNDERSTORMS WITH IT AS WELL, WHERE RAIN RATES
MAY NEAR ONE HALF INCH PER HOUR IN ANY STORM. THIS WILL ALSO BRING
THE COLDEST AIR OF THE WEEK TO THE REGION WITH HIGH TEMPERATURES
5 TO 15 DEGREES BELOW NORMAL; SAY HELLO TO THE 70S IN THE LOWER
DESERTS AND ONLY REACHING INTO THE 40S AND 50S ACROSS THE
MOUNTAINS.
MODEL GUIDANCE CONTINUES TO SLOW THE WEATHER SYSTEM DOWN ON SUNDAY
EVENING INTO MONDAY. THIS WOULD BRING THE CHANCE FOR CONTINUED
SHOWER ACTIVITY ACROSS THE AREA, WITH DRYING OCCURRING FROM NORTH
TO SOUTH LATE SUNDAY NIGHT THROUGH MONDAY MORNING. ANOTHER AREA OF
LOW PRESSURE MOVES IN FROM THE GULF OF ALASKA INTO THE NORTHERN
ROCKIES BY THE MIDDLE AND END OF NEXT WEEK. THIS WILL CREATE A
BROAD TROUGHING PATTERN OVER OUR REGION, LEADING TO DRY CONDITIONS
AND TEMPERATURES CLOSER TO AVERAGE.
AVIATION
101800Z...COASTS/VALLEYS...LOW MARINE LAYER CLOUDS FROM THIS MORNING
HAVE FULLY CLEARED, WITH VFR PREVAILING. BKN-OVC CLOUDS MOVE BACK
INLAND AFTER 02Z SATURDAY, LIFTING FROM 2000-2500FT MSL INITIALLY TO
ABOVE 3500 FT MSL OVERNIGHT. SPOTTY -SHRA MOVES INLAND AFTER 03Z
THROUGH SAT MORNING, BRINGING PERIODIC MVFR CIGS AND VIS 4-6 SM.
-SHRA DECREASES 12-15Z SATURDAY, WITH CLOUD COVER CLEARING 16-19Z.
MOUNTAINS/DESERTS
WEST TO SOUTHWEST WINDS INCREASE AFTER
20Z THIS AFTERNOON WITH GUSTS 35-50 KT THROUGH PASSES, ALONG DESERTS
SLOPES AND LOCALLY INTO THE DESERTS. LOCAL AREAS BLDU (VIS 3-5SM)
EXPECTED. MODERATE UP/DOWNDRAFTS IN LEE OF MTNS. WIND GUSTS RELAX BY
06-09Z SATURDAY, BUT ARE EXPECTED TO PICK BACK UP AGAIN AFTER 20Z
SATURDAY AFTERNOON.
MARINE
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS SUNDAY AFTERNOON.
ADDITIONALLY THERE WILL BE PERIODS OF INCREASED NORTHWEST WINDS WITH
GUSTS 15 TO 20 KT AND CHOPPY SEAS THAT COULD GENERATE HAZARDOUS
CONDITIONS THROUGH THE DAY SUNDAY.
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...MUNYAN
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