170
FXUS66 KSGX 012027
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
127 PM PDT WED APR 1 2026
SYNOPSIS
SHOWERS ARE ENDING THIS MORNING AS THE SYSTEM MOVES TO THE EAST.
COOLER AND BREEZY CONDITIONS WILL CONTINUE THROUGH THURSDAY WITH
WEST WINDS IN THE MOUNTAINS AND DESERTS GUSTING 35 TO 45 MPH.
LOCALLY GUSTING TO 55 MPH. FOR FRIDAY AND SATURDAY, OFFSHORE
SURFACE FLOW AND HIGH PRESSURE ALOFT WILL BRING WARMING AND DRYING
WITH NORTHEAST WINDS ALONG AND BELOW THE COASTAL SLOPES OF THE
MOUNTAINS GUSTING 30 TO 40 MPH. THEN SLIGHTLY COOLER WITH WEAKER
WINDS FOR EARLY NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
WEDNESDAY THROUGH FRIDAY...THE LOW-PRESSURE SYSTEM HAS MOVED
EAST, ENDING THE RAIN OVER THE AREA. MOST OF THE RAIN FELL IN THE
SAN BERNARDINO MOUNTAINS (0.15"-0.93"), THEN THE INLAND EMPIRE
(0.08"-0.79"), AND ORANGE COUNTY(0.01"-0.27"). SAN DIEGO COUNTY
CAME IN WITH AMOUNTS 0.01"-0.14" WITH THE HIGHER AMOUNTS OCCURRING
AROUND PALOMAR MOUNTAIN. PRECIP CHANCES WILL CONTINUE TO TREND
LOWER THROUGH THE DAY, FALLING BELOW 10% OVERNIGHT TONIGHT.
WESTERLY WINDS HAVE PICKED UP ON THE EASTERN SIDE OF THE MOUNTAINS,
ESPECIALLY ON THE NORTHERN END OF THE COACHELLA VALLEY. GUSTS ON
THE WESTERN SIDE OF THE MOUNTAINS ARE CURRENTLY 25-35 MPH WITH
COACHELLA SHOWING GUSTS OF 30-40 MPH. WIND GUSTS ARE EXPECTED TO
REACH 35-45 MPH IN THE MOUNTAINS AND DESERTS TODAY AND TOMORROW
WITH GUSTS LOCALLY UP TO 55 MPH.
TEMPERATURES WILL TREND LOWER TODAY AND THURSDAY WITH HIGHS IN THE
MID 60S TO LOW 70S ALONG THE COASTS AND VALLEYS, 50S TO LOW 60S IN
THE MOUNTAINS, MID 60S TO MID 70S IN THE HIGH DESERTS, AND IN THE
80S IN COACHELLA AND SAN DIEGO DESERTS.
FRIDAY, WINDS AT THE SURFACE SHIFT TO OFFSHORE AS HIGH PRESSURE
BUILDS ALOFT. THIS WILL BRING HIGHER TEMPERATURES TO THE COASTS
AND VALLEYS WITH TEMPERATURES 5-10 DEGREES ABOVE THE SEASONAL
AVERAGE. NORTHEAST WINDS WILL BE BREEZY WITH THE HIGHEST WINDS IN
THE COASTAL SLOPES AND MOUNTAIN AREAS. GUSTS OF 35-45 MPH AREA
EXPECTED IN DESERT AREAS AND THE SAN DIEGO VALLEY. STRONGER WIND
GUSTS OF 50-65 MPH WILL BE POSSIBLE ON COASTAL MOUNTAIN SLOPES
AND ADJACENT VALLEYS.
SATURDAY THROUGH WEDNESDAY... OFFSHORE WINDS CONTINUE INTO
SATURDAY AS HIGH PRESSURE CONTINUES TO FILL IN OVER THE AREA.
EXPECT WIND GUSTS OF 40 TO 50 MPH IN THE COASTAL SLOPES OF THE
MOUNTAINS AND DESERTS, LOCALLY 55-60 MPH. HIGH TEMPERATURES WILL
BE IN THE 70S AND MID 80S ALONG THE COAST AND IN THE VALLEYS,
UPPER 50S TO MID 70S IN THE MOUNTAINS, AND 80S TO LOW 90S IN THE
COACHELLA VALLEY AND SAN DIEGO DESERTS.
CONDITIONS WEST OF THE MOUNTAINS WILL COOL SUNDAY AS ONSHORE FLOW
RETURNS. TEMPERATURES WILL CONTINUE TO INCREASE IN THE MOUNTAINS
AND DESERTS. NEXT WEEK, TEMPERATURES FLUCTUATE A FEW DEGREES INTO
MID- WEEK WITH MOSTLY CLEAR SKIES IN THE AFTERNOON.
AVIATION
011700Z...COAST/VALLEYS...SCT-BKN CLOUD LAYERS 2500-6000 FT MSL
CONTINUING THROUGH THE MORNING. SUBTLE SCATTER OUT FROM NORTH TO
SOUTH AFTER 18Z, WITH ONLY INTERMITTENT CLEARING IN SAN DIEGO COUNTY
VALLEYS/FOOTHILLS THIS AFTERNOON. LOW CLOUDS FILL IN ONCE AGAIN
GRADUALLY AFTER 00Z AND EVENTUALLY FILL THE COASTAL BASIN WITH BASES
2000-3000 FEET MSL OVERNIGHT INTO THURSDAY.
MOUNTAINS/DESERTS...AREAS OF HIGHER TERRAIN OBSCURED THROUGH MUCH OF
THE DAY WITH SOME INTERMITTENT CLEARING THIS AFTERNOON. LAYERED
BASES UP TO 12 KFT MSL. STRONG WESTERLY WINDS 30-40 KNOTS WITH GUSTS
50 KNOTS OVER MOUNTAIN RIDGES, THROUGH MOUNTAIN GAPS, AND DESERT
SLOPES TODAY; GUSTS NEAR 30 KTS POSSIBLE VCTY KPSP/KTRM. MOD
UP/DOWNDRAFTS IN LEE OF MOUNTAINS, AND AREAS OF VIS REDUCED TO 2-5SM
IN BLDU IN DESERTS. WINDS BECOMING MORE LOCALIZED TO MOUNTAINS AFTER
06Z FRI.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH THURSDAY
MORNING AND FRIDAY THROUGH SUNDAY. AREAS OF NORTHWEST WIND GUSTS TO
EXCEED 20 KNOTS LATE THURSDAY IN THE OUTER WATERS.
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 PM PDT THURSDAY FOR APPLE AND LUCERNE
VALLEYS-COACHELLA VALLEY-RIVERSIDE COUNTY MOUNTAINS-SAN
BERNARDINO COUNTY MOUNTAINS-SAN DIEGO COUNTY DESERTS-SAN
DIEGO COUNTY MOUNTAINS-SAN GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...VILLAFANE/PG
AVIATION/MARINE...APR
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