675
FXUS66 KSGX 231000
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
300 AM PDT MON MAR 23 2026
SYNOPSIS
HIGH PRESSURE ALOFT WILL MAINTAIN HIGH TEMPERATURES THROUGH FRIDAY
FROM AROUND 10 DEGREES ABOVE AVERAGE NEAR THE COAST TO 15 TO 20
DEGREES ABOVE AVERAGE FOR INLAND AREAS. NIGHT AND MORNING COASTAL
LOW CLOUDS AND FOG WILL SPREAD INTO THE WESTERN VALLEYS AT TIMES.
COOLING WILL BEGIN TO SPREAD INLAND NEXT WEEKEND, BUT WITH HIGH
TEMPERATURES FOR NEXT SUNDAY STILL 10 TO 15 DEGREES ABOVE AVERAGE.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH WEDNESDAY)
HIGH PRESSURE ALOFT WILL STRENGTHEN ACROSS SOUTHERN CALIFORNIA
THROUGH TUESDAY, THEN WEAKEN SLIGHTLY AND BRIEFLY ON WEDNESDAY.
THERE WILL BE SLIGHT DAY-TO-DAY TEMPERATURE DIFFERENCES. HIGH
TEMPERATURES WILL REMAIN AROUND 10 DEGREES ABOVE AVERAGE NEAR THE
COAST TO 15 TO 20 DEGREES FOR INLAND AREAS.
HIGH TEMPERATURES WILL RANGE FROM THE 70S NEAR THE COAST TO THE
UPPER 80S TO MID 90S FOR THE INLAND EMPIRE WITH THE LOWER DESERTS
IN THE UPPER 90S TO AROUND 100. SEVERAL LOCATIONS IN THE
MOUNTAINS, DESERTS, VALLEYS, AND INLAND ORANGE COUNTY WILL
CONTINUE TO TIE OR BREAK DAILY HIGH TEMPERATURE RECORDS AND
RECORDS FOR WARMEST LOW TEMPERATURES.
THE MARINE LAYER IS AROUND 1500 FEET DEEP. NIGHT AND MORNING
COASTAL LOW CLOUS AND FOG WILL SPREAD INTO THE FAR WESTERN ALLEYS
AT TIMES THROUGH THE MIDDLE OF THE WEEK.
LONG TERM (THURSDAY THROUGH SUNDAY)
DRY WEATHER WILL CONTINUE THROUGH NEXT WEEKEND. FOR NEXT WEEKEND,
HIGH PRESSURE ALOFT WILL BEGIN TO WEAKEN AND ONSHORE FLOW WILL
BEGIN TO STRENGTHEN AS A LOW PRESSURE SYSTEM OVER THE EASTERN
PACIFIC MOVES TOWARD THE WEST COAST. COOLING WILL BEGIN TO SPREAD
INLAND NEXT WEEKEND. HOWEVER, HIGH TEMPERATURES FOR NEXT SUNDAY
WILL STILL BE A AROUND 10 TO 15 DEGREES ABOVE AVERAGE. HIGH
TEMPERATURES ON SUNDAY WILL RANGE FROM THE 70S NEAR THE COAST TO
MID 80S TO LOWER 90S FOR THE INLAND EMPIRE WITH THE LOWER DESERTS
IN THE MID 90S TO AROUND 100.
AVIATION
230930Z...LOW CLOUDS BASED 700-1000 FEET MSL, TOPS 1500 FEET, AND
LOCAL VIS REDUCED 1-5SM OVER HIGHER COASTAL TERRAIN WILL CONTINUE
OVER COASTAL AREAS AND WESTERN VALLEYS THIS MORNING. SCATTER OUT
SHOULD OCCUR 16-17Z. LOW CLOUDS BASED 600-900 FEET MSL RETURN TO THE
COASTAL AREAS AFTER 04Z INTO TUESDAY MORNING. OTHERWISE, MOSTLY
CLEAR AND VFR CONDITIONS WILL PREVAIL INTO TUESDAY.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH FRIDAY.
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...MM
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