429
FXUS66 KSGX 290928
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
228 AM PDT TUE JUL 29 2025
SYNOPSIS
HIGH TEMPERATURES WILL WARM AS MUCH AS 5 TO 10 DEGREES TODAY FOR
THE VALLEYS WITH ANOTHER FEW DEGREES OF WARMING FOR COASTAL AREAS
ON WEDNESDAY. WEDNESDAY HIGH TEMPERATURES WILL MOSTLY BE WITHIN A
FEW DEGREES OF AVERAGE FOR MOST AREAS WITH MINOR DAY TO DAY
CHANGES INTO EARLY NEXT WEEK. NIGHT AND MORNING COASTAL LOW CLOUDS
WILL SPREAD INTO PORTIONS OF THE WESTERN VALLEYS LATE EACH NIGHT.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH THURSDAY)
HIGH PRESSURE TO THE SOUTH WILL BRING WARMING OF HIGH
TEMPERATURES IN THE VALLEYS OF 5 TO 10 DEGREES TODAY WITH ANOTHER
FEW DEGREES OF WARMING FOR COASTAL AREAS ON WEDNESDAY. WEDNESDAY
HIGH TEMPERATURES WILL MOSTLY BE WITHIN A FEW DEGREES OF AVERAGE
FOR MOST AREAS WITH MINOR DAY TO DAY CHANGES INTO EARLY NEXT WEEK.
HIGH TEMPERATURES ON WEDNESDAY WILL RANGE FROM THE 70S NEAR THE
COAST TO THE 90S FOR THE INLAND EMPIRE WITH 106 TO 112 FOR THE
LOWER DESERTS. A MARINE LAYER NEAR 2000 FEET DEEP EARLY THIS
MORNING WILL MOSTLY FLUCTUATE BETWEEN 1500 AND 2000 FEET DEEP FOR
WEDNESDAY INTO EARLY NEXT WEEK WITH NIGHT AND MORNING COASTAL LOW
CLOUDS SPREADING INTO PORTIONS OF THE WESTERN VALLEYS LATE EACH
NIGHT.
LONG TERM (FRIDAY THROUGH MONDAY)
ONSHORE LOWER-LEVEL FLOW AND DRY SOUTHWEST FLOW ALOFT WILL
CONTINUE THROUGH THE WEEKEND INTO EARLY NEXT WEEK. HIGH
TEMPERATURES WILL REMAIN AROUND AVERAGE WITH SLIGHT DAY-TO-DAY
CHANGES. NIGHT AND MORNING COASTAL LOW CLOUDS WILL SPREAD INTO
PORTIONS OF THE WESTERN VALLEYS LATE EACH NIGHT.
AVIATION
290800Z....COAST/WESTERN VALLEYS...LOW CLOUDS WITH BASES 1100-1300FT
MSL HAVE MOVED INTO THE COASTAL BASINS AND WESTERN VALLEYS, WITH
FURTHER INLAND EXTENT THROUGH 12Z. 10-15% CHANCE OF A BRIEF CIG AT
KONT ANYTIME BETWEEN 13-15Z. HIGH-END IFR AND LOW-END MVFR PREVAILS
UP TO 15 MILES INLAND THROUGH 15Z. LOCALIZED VIS REDUCTIONS DOWN TO
2-5SM FOR COASTAL TERRAIN GENERALLY AFTER 10Z. CLEARING TO THE COAST
OCCURS BY 16-17Z, WITH AREAS OF LOW CLOUDS PERSISTING AT THE BEACHES
BEYOND THIS POINT. LOW CLOUDS DEVELOP AND MOVE INLAND AGAIN TONIGHT
SLIGHTLY LATER, GENERALLY AFTER 06Z WED, WITH SLIGHTLY LOWER BASES
CLOSER TO 800-1000FT MSL.
INLAND VALLEYS/MOUNTAINS/DESERTS
MOSTLY CLEAR WITH VFR CONDITIONS
THROUGH WEDNESDAY MORNING.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH 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...17
AVIATION/MARINE...ZUBER
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