626
FXUS66 KSGX 031248
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
224 AM PDT MON AUG 3 2026
SYNOPSIS
NOT QUITE AS HOT FOR THE LATTER HALF OF THE WEEK, BUT WITH HIGH
TEMPERATURES STILL AROUND 5 DEGREES ABOVE AVERAGE FOR INLAND
AREAS. MONSOONAL MOISTURE IN EASTERLY FLOW ALOFT MAY RETURN FOR
THURSDAY INTO NEXT WEEKEND, BUT WITH CHANCES FOR MEASURABLE
RAINFALL EACH AFTERNOON FOR THE MOUNTAINS FROM SHOWERS OR
THUNDERSTORMS MOSTLY LESS THAN 15 PERCENT.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH WEDNESDAY)
TEMPERATURES WILL REMAIN ABOVE AVERAGE FOR THIS WEEK THROUGH WILL
MODERATE SLIGHTLY WITH HIGH TEMPERATURES FOR INLAND AREAS AROUND 5
TO 10 DEGREES ABOVE AVERAGE TODAY AND AROUND 5 DEGREES ABOVE
AVERAGE FOR THE LATTER HALF OF THE WEEK. HIGH TEMPERATURES FOR
TODAY WILL RANGE FROM THE MID 70S TO LOWER 80S NEAR THE COAST TO
THE MID 90S TO 105 FOR THE INLAND EMPIRE WITH 112 TO 116 FOR THE
LOWER DESERTS. NIGHT AND MORNING LOW CLOUDS WILL SPREAD INTO
COASTAL AREAS AND OCCASIONALLY THE FAR WESTERN VALLEYS LATE EACH
NIGHT.
LONG TERM (THURSDAY THROUGH SUNDAY)
THERE MAY BE SOME INFLUX OF MONSOONAL MOISTURE IN EASTERLY FLOW
ALOFT INTO THE MOUNTAINS AND DESERTS FOR THURSDAY THROUGH NEXT
WEEKEND. HIGH TEMPERATURES WILL CHANGE LITTLE OR MAY DECREASE
SLIGHTLY IN THE LOWER DESERTS DEPENDING ON THE AMOUNT OF ANY
MOISTURE INFLUX. LOW TEMPERATURES WILL WARM SLIGHTLY.
HIGH TEMPERATURES FOR THURSDAY THROUGH SATURDAY WILL GENERALLY
RANGE FROM A FEW DEGREES ABOVE AVERAGE NEAR THE COAST TO 4 TO 8
DEGREES ABOVE AVERAGE FOR INLAND AREAS. HIGH TEMPERATURES WILL
RANGE FROM THE MID 70S TO LOWER 80S NEAR THE COAST TO THE 90S TO
104 FOR THE INLAND EMPIRE WITH 108 TO 114 FOR THE LOWER DESERTS.
CHANCES FOR MEASURABLE RAINFALL EACH AFTERNOON FOR THE MOUNTAINS
FROM SHOWERS OR THUNDERSTORMS MOSTLY LESS THAN 15 PERCENT.
AVIATION
010600Z....COASTS/VALLEYS...LOW CLOUDS BASED 1000-1400 FT MSL ARE
INCREASING IN COVERAGE IN THE COASTAL AREAS AT THIS HOUR. KSAN AND
KCRQ ARE ALREADY EXPERIENCING CIG IMPACTS AND KSNA WILL LIKELY SOON
SEE CIG IMPACTS. LOW CLOUDS COULD SPREAD UP TO 15 MILES INLAND BY
SUNRISE. PATCHES OF FOG COULD RESTRICT VIS TO 2-5 MILES ON HIGHER
COASTAL TERRAIN. LOW CLOUDS AND FOG WILL BEGIN TO CLEAR FROM INLAND
AREAS 15-16Z THEN FROM THE COAST 16-17Z. SIMILAR BASED CLOUDS WILL
DEVELOP AND MOVE INLAND AGAIN AFTER 02-03Z TUE.
MOUNTAINS/DESERTS...EXPECT MOSTLY CLEAR SKIES WITH UNRESTRICTED
VIS.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH THURSDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...EXTREME HEAT WARNING UNTIL 8 PM PDT MONDAY FOR RIVERSIDE COUNTY
MOUNTAINS-SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE
INLAND EMPIRE-SAN DIEGO COUNTY MOUNTAINS.
HEAT ADVISORY UNTIL 8 PM PDT MONDAY FOR SAN BERNARDINO COUNTY
MOUNTAINS.
EXTREME HEAT WARNING FROM 10 AM MONDAY TO 8 PM PDT WEDNESDAY FOR
APPLE AND LUCERNE VALLEYS.
EXTREME HEAT WARNING UNTIL 8 PM PDT TUESDAY FOR COACHELLA VALLEY-
SAN DIEGO COUNTY DESERTS-SAN GORGONIO PASS NEAR BANNING.
PZ...NONE.
PUBLIC...17
AVIATION/MARINE...PG
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