358
FXUS66 KSGX 230433
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
933 PM PDT WED APR 22 2026
SYNOPSIS
THURSDAY WILL BE A LITTLE WARMER AND DRY. COOLER WITH GUSTY
ONSHORE WINDS FRIDAY THROUGH THE WEEKEND. SATURDAY EVENING INTO
SUNDAY MORNING THERE IS A CHANCE OF PRECIPITATION OVER AND WEST OF
THE MOUNTAINS. CONTINUED TROUGHING ALOFT WILL CONTINUE SLIGHTLY
BELOW AVERAGE TEMPERATURES AND WINDIER CONDITIONS WITH CHANCES OF
PRECIPITATION INTO THE MIDDLE OF NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
EVENING UPDATE...
A FEW LOW CLOUDS REMAIN BANKED UP AGAINST THE MOUNTAINS IN SAN
DIEGO COUNTY, OTHERWISE SKIES ARE CLEAR. THE 00Z KNKX SOUNDING
SHOWS THE MARINE INVERSION IS FAIRLY WEAK, SO EXPECT ANY LOW
CLOUDS TO REMAIN PATCHY TONIGHT. GUSTY WEST WINDS CONTINUE ACROSS
THE MOUNTAINS AND DESERTS, STRONGEST THROUGH THE PASSES WHERE
GUST ARE CURRENTLY 40-50 MPH. WINDS GRADUALLY WEAKEN THROUGH THE
NIGHT TONIGHT, BRIEFLY TURNING NORTHERLY THURSDAY MORNING. WARMER
ACROSS THE AREA ON THURSDAY AS THE UPPER LOW MOVES EAST WITH HIGH
TEMPERATURES RETURNING TO NEAR NORMAL FOR LATE APRIL. WARMING
CONTINUES ON FRIDAY IN THE MOUNTAINS AND DESERTS, WITH LITTLE
CHANGE WEST OF THE MOUNTAINS.
PREVIOUS DISCUSSION...
THIS WEEKEND, AN AREA OF LOW PRESSURE IS EXPECTED TO MOVE ACROSS
CENTRAL CALIFORNIA. THAT WILL BRING AN INCREASE IN WINDS AND
POTENTIAL FOR PRECIPITATION OVER AND WEST OF THE MOUNTAINS.
SOUTHWEST TO WEST WINDS WILL INCREASE OVER THE MOUNTAINS AND INTO
THE DESERTS FRIDAY THROUGH SUNDAY, WITH STRONGEST GUSTS EXPECTED ON
SATURDAY AFTERNOON AND EVENING. PEAK GUSTS OF 40 TO 50 MPH, LOCALLY
UP TO 65 MPH POSSIBLE. LIGHT PRECIPITATION IS EXPECTED WITH THE
PASSAGE OF THIS LOW, WITH THE MOST LIKELY TIME FOR ANY PRECIPITATION
TO BE SATURDAY AFTERNOON INTO SUNDAY MORNING. OVERALL, RAINFALL
TOTALS ARE EXPECTED TO BE ON THE LIGHTER SIDE. NBM CHANCES FOR
RAINFALL TO EXCEED 0.25" IS 15-30% IN THE MOUNTAINS AND LESS THAN
10% ELSEWHERE.
DRY AND WARMER CONDITIONS EXPECTED TO RETURN FOR NEXT MONDAY, WITH
HIGH TEMPERATURES FOR INLAND AREAS STILL A FEW TO AROUND 5 DEGREES
BELOW AVERAGE. ANOTHER DISTURBANCE MOVING THROUGH THE MEAN FLOW IS
EXPECTED MID-WEEK, WHICH WOULD KEEP CONDITIONS ON THE COOLER SIDE
AND INCREASE WINDS AND PRECIPITATION CHANCES.
AVIATION
230430Z...COAST/VALLEYS...PATCHY LOW CLOUDS BASED 2000-3000 FT MSL
WILL CONTINUE TO DEVELOP OVER SAN DIEGO COUNTY IN THE NEXT FEW
HOURS. CLOUDS BECOME MORE CONFINED TO COASTAL AREAS AFTER 09Z AND
MAY SPREAD INTO COASTAL ORANGE COUNTY, BUT COVERAGE SHOULD REMAIN
PATCHY. ANY REMAINING LOW CLOUDS SCATTER BY 12-15Z. OTHERWISE, SCT-
BKN HIGH CLOUDS AOA 20 KFT EXPECTED FROM EARLY THURSDAY MORNING
THROUGH THE AFTERNOON. LOW CLOUDS WILL STRUGGLE TO REFORM THURSDAY
NIGHT WITH ONLY A 20-30% CHANCE OF ANY DEVELOPMENT.
MOUNTAINS/DESERTS...WEST WINDS WILL CONTINUE THIS EVENING WITH GUSTS
25-35 KTS, LOCALLY 40 KTS THROUGH PASSES AND ALONG DESERT SLOPES.
LOCAL UP/DOWNDRAFTS IN LEE OF MOUNTAINS AND PATCHY BLDU REDUCING VIS
IN THE DESERTS. WINDS WILL BEGIN TO EASE AROUND 12-15Z THURSDAY.
MARINE
WEST-NORTHWEST WINDS WILL CONTINUE TO GUST 20-25 KTS IN THE OUTER
WATERS THROUGH EARLY THURSDAY MORNING, GENERATING CHOPPY AND
HAZARDOUS CONDITIONS. MORE DETAILS CAN BE FOUND IN THE SMALL CRAFT
ADVISORY. NO ADDITIONAL HAZARDOUS MARINE CONDITIONS ARE EXPECTED
THURSDAY THROUGH MONDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...SMALL CRAFT ADVISORY UNTIL 3 AM PDT THURSDAY FOR WATERS FROM SAN
MATEO POINT TO THE MEXICAN BORDER EXTENDING 10 TO 60 NM OUT
INCLUDING SAN CLEMENTE ISLAND.
PUBLIC...SS/CO
AVIATION/MARINE...KW
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