176
FXUS66 KSGX 041137
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
436 AM PDT THU JUN 4 2026
SYNOPSIS
WARMING WILL CONTINUE FOR TODAY WITH HIGH TEMPERATURES 5 TO 10
DEGREES ABOVE AVERAGE. THIS WILL BE FOLLOWED BY COOLING THROUGH
THE WEEKEND WITH SUNDAY HIGH TEMPERATURES A FEW TO AROUND 5
DEGREES BELOW AVERAGE. THE MARINE LAYER WILL DEEPEN FOR THE
WEEKEND WITH NIGHT AND MORNING COASTAL LOW CLOUDS COVERING MUCH OF
THE VALLEYS. SOUTHWEST TO WEST WINDS DURING THE AFTERNOON AND
EVENING ON FRIDAY AND SATURDAY FOR THE MOUNTAINS AND DESERTS WILL
GUST TO 30 TO 40 MPH. THERE WILL BE SLOW WARMING FOR EARLY NEXT
WEEK WITH HIGH TEMPERATURES ON WEDNESDAY WITHIN A FEW DEGREES OF
AVERAGE. THE MARINE LAYER WILL DECREASE IN DEPTH WITH NIGHT AND
MORNING COASTAL LOW CLOUDS NOT SPREADING AS FAR INTO THE VALLEYS.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION AND MARINE DISCUSSIONS
SHORT TERM (TODAY THROUGH SATURDAY)
HIGH PRESSURE ALOFT ACROSS SOUTHERN CALIFORNIA WILL CONTINUE THE
WARMING TREND FOR TODAY WITH HIGH TEMPERATURES A FEW DEGREES
WARMER THAN WEDNESDAY. HIGH TEMPERATURES FOR TODAY WILL BE A FEW
DEGREES ABOVE AVERAGE NEAR THE COAST TO 5 TO 10 DEGREES ABOVE
AVERAGE FOR INLAND AREAS. HIGH TEMPERATURES FOR TODAY WILL RANGE
FROM THE LOWER 70S NEAR THE COAST TO THE MID 80S TO MID 90S FOR
THE INLAND EMPIRE WITH 105 TO 110 FOR THE LOWER DESERTS. THE
MARINE LAYER IS AROUND 2000 FEET DEEP. COASTAL LOW CLOUDS WILL
EXTEND INLAND INTO THE WESTERN VALLEYS IN SAN DIEGO COUNTY AND
INTO FAR WESTERN AND FAR SOUTHERN PORTIONS OF THE INLAND EMPIRE
INTO THIS MORNING.
ON FRIDAY, HIGH PRESSURE ALOFT WILL BEGIN TO WEAKEN AND A LOW
PRESSURE SYSTEM WILL MOVE TO NEAR THE WEST COAST FOR THE WEEKEND.
ONSHORE FLOW WILL STRENGTHEN AND THE MARINE LAYER WILL DEEPEN FOR
THE WEEKEND. THERE WILL BE SLIGHT COOLING OF HIGH TEMPERATURES ON
FRIDAY. THERE WILL BE GREATER COOLING ON SATURDAY WITH HIGH
TEMPERATURES A FEW DEGREES COOLER TO 4 TO 8 DEGREES COOLER FOR THE
MOUNTAINS, INLAND VALLEYS, AND HIGH DESERTS.
HIGH TEMPERATURES ON SATURDAY WILL BE A FEW DEGREES BELOW AVERAGE
FOR THE COAST AND VALLEYS AND AROUND 5 DEGREES ABOVE AVERAGE FOR
THE DESERTS. HIGH TEMPERATURES ON SATURDAY WILL RANGE FROM AROUND
70 NEAR THE COAST TO THE 80S FOR THE INLAND EMPIRE WITH 102 TO 106
FOR THE LOWER DESERTS. THE MARINE LAYER WILL DEEPEN FOR FRIDAY
AFTERNOON THROUGH THE WEEKEND. COASTAL LOW CLOUDS WILL SPREAD INTO
THE WESTERN VALLEYS EARLY FRIDAY AND ACROSS MUCH OF THE VALLEYS
FOR EARLY SATURDAY.
DURING THE AFTERNOON AND EVENING ON FRIDAY AND SATURDAY, SOUTHWEST
WINDS FOR THE DESERT SLOPES OF THE SAN BERNARDINO COUNTY MOUNTAINS
AND THE HIGH DESERT WILL GUST TO 30 TO 40 MPH WITH WEST WINDS IN
THE NORTHERN COACHELLA VALLEY BELOW THE SAN GORGONIO PASS GUSTING
TO 35 TO 45 MPH ON FRIDAY AFTERNOON AND EVENING AND 45 TO 55 MPH
ON SATURDAY AFTERNOON AND EVENING.
LONG TERM (SUNDAY THROUGH WEDNESDAY)
HIGH TEMPERATURES WILL COOL ANOTHER 5 DEGREES ON SUNDAY FOR INLAND
AREAS WITH HIGH TEMPERATURES A FEW DEGREES BELOW AVERAGE TO AROUND
5 DEGREES BELOW AVERAGE FOR THE MOUNTAINS AND INLAND VALLEYS. HIGH
TEMPERATURES ON SUNDAY WILL RANGE FROM AROUND 70 NEAR THE COAST TO
THE UPPER 70S TO MID 80S FOR THE INLAND EMPIRE WITH THE LOWER
DESERTS AROUND 100.
HIGH TEMPERATURES WILL WARM VERY SLOWLY FOR MONDAY THROUGH
WEDNESDAY OF NEXT WEEK WITH HIGH TEMPERATURES ON WEDNESDAY MOSTLY
WITHIN A FEW DEGREES OF AVERAGE. HIGH TEMPERATURES FOR NEXT
WEDNESDAY WILL RANGE FROM THE LOWER 70S NEAR THE COAST TO THE 80S
FOR THE INLAND EMPIRE WITH 100 TO 104 FOR THE LOWER DESERTS.
COASTAL LOW CLOUDS WILL SPREAD INLAND ACROSS MUCH FOR THE VALLEYS
FOR EARLY SUNDAY. FOR MONDAY THROUGH WEDNESDAY, THE MARINE LAYER
WILL SLOWLY DECREASE IN DEPTH WITH NIGHT AND MORNING COASTAL LOW
CLOUDS SPREADING INTO THE WESTERN VALLEYS LATE EACH NIGHT.
AVIATION
041130Z...COAST/VALLEYS...LOW CLOUDS WITH BASES 800-1200 FEET MSL
WITH TOPS TO 2000 FEET WILL CONTINUE TO FILL INTO WESTERN VALLEYS
THIS MORNING. LOCAL VIS INLAND 0-5SM. SCATTER OUT 16-19Z, EXCEPT
AREAS OF LOW CLOUDS WILL PERSIST AT THE IMMEDIATE COAST. LOW CLOUDS
OF SIMILAR BASES/TOPS/VIS TO DEVELOP AND PUSH INLAND TO A VERY
SIMILAR EXTENT AFTER 23Z INTO FRIDAY.
MOUNTAINS/DESERTS...CLEAR SKIES AND VFR CONDITIONS TODAY AND
TONIGHT.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH MONDAY.
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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