677
FXUS66 KSGX 291548
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
848 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...
MORNING UPDATE
LOW CLOUDS WILL CONTINUE TO FADE OUT OF THE WESTERN VALLEYS THIS
MORNING. THIS MORNING'S SOUNDING SHOWS A STRONGER INVERSION NEAR
10C, WHICH MAY INHIBIT CLEARING ALONG PORTIONS OF THE COAST TODAY.
SLIGHTLY WARMER WEATHER WILL OCCUR TODAY, WITH NOT MUCH CHANGE
THROUGH THE REST OF THE WEEK.
PREVIOUS DISCUSSION (228 AM TUESDAY)
SHORT TERM (TODAY THROUGH THURSDAY)
HIGH PRESSURE TO THE SOUTH WILL BRING WARMING OF HIGH TEMPERATURES
IN THE VALLEYS OF 5 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
291530Z....COAST/WESTERN VALLEYS...LOW CLOUDS WITH BASES
1000-1300 FEET MSL, TOPS TO 1800 FEET, AND REDUCED VIS ON HIGHER
TERRAIN WILL GRADUALLY CLEAR TO THE COAST BY 18Z. AREAS OF LOW
CLOUDS WILL PERSIST ALONG THE IMMEDIATE COAST AFTER 18Z. LOW
CLOUDS WILL DEVELOP AND MOVE NOT AS FAR INLAND TONIGHT, GENERALLY
AFTER 06Z, WITH BASES AROUND 600-1000 FEET MSL. SCATTER OUT
WEDNESDAY 15-17Z.
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...APR/17
AVIATION/MARINE...MM
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