750
FXUS66 KSGX 032042
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
142 PM PDT WED JUN 3 2026
SYNOPSIS
HIGH PRESSURE ALOFT WILL BRING WARMER TEMPERATURES FOR THURSDAY
AND FRIDAY, PRIMARILY FOR INLAND AREAS WHERE AFTERNOON HIGHS WILL
BE 5 TO 10 DEGREES ABOVE AVERAGE. COASTAL LOW CLOUDS WILL ONLY
EXTEND INTO THE WESTERN VALLEYS FOR EARLY THURSDAY AND EARLY
FRIDAY AS THE MARINE LAYER BECOMES A LITTLE SHALLOWER. A LOW
PRESSURE SYSTEM MOVING INTO THE WESTERN STATES WILL BRING COOLING
AND DEEPENING OF THE MARINE LAYER FOR THE WEEKEND WITH COASTAL LOW
CLOUDS EXTENDING ONTO THE COASTAL SLOPES OF THE MOUNTAINS EARLY
SUNDAY.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
CURRENT SATELLITE IMAGERY THIS AFTERNOON SHOWS THE MARINE LAYER
CLOUDS HAVE RETREATED TO THE BEACHES OR OFFSHORE WITH HIGH CIRRUS
CLOUDS STREAMING IN FROM THE NORTH. THIS NORTHERLY FLOW ALOFT IS
ASSOCIATED WITH A WEAK UPPER LOW WEST OF BAJA, WHICH IS PROGGED TO
CONTINUE TO DRIFT SOUTH AND EAST INTO THURSDAY. THIS ALLOWS WEAK
RIDGING TO BUILD IN, KEEPING WEATHER QUIET, TRENDING TEMPERATURES
WARMER, AND THE MARINE LAYER LOCKED IN. THE RIDGE AXIS PEAKS
THURSDAY INTO FRIDAY, WITH THESE DAYS BEING THE HOTTEST OF THE WEEK,
HIGH TEMPERATURES RANGING 5-10 DEGREES ABOVE NORMAL. ASIDE FROM THE
MILD INLAND TEMPERATURES, THE ONLY OTHER NOTABLE CONSEQUENCE OF THIS
PATTERN WILL BE ELEVATED WINDS IN THE MOUNTAINS AND DESERTS. THE
RESULTING PRESSURE GRADIENT FROM THE NEARBY UPPER RIDGE IS STRONGEST
ON FRIDAY AND SATURDAY, WHICH COULD BRING 30-40 MPH SOUTH-SOUTHWEST
WIND GUSTS.
THE NEXT UPPER TROUGH BEGINS TO PUSH INTO THE PACIFIC NORTHWEST
FRIDAY INTO SATURDAY, HELPING TO COOL TEMPERATURES BACK DOWN CLOSER
TO AVERAGE BY SUNDAY. ENSEMBLES BEGIN TO SHOW SOME DIVERGENCE IN THE
STRENGTH/PROGRESSION OF THIS TROUGH AND A SECONDARY/REINFORCING
UPPER LOW INTO EARLY NEXT WEEK. DESPITE THESE SUBTLE DISAGREEMENTS,
THE GENERAL CONSENSUS IS THAT TEMPERATURES REMAIN NEAR TO SLIGHTLY
BELOW NORMAL THROUGH MID-NEXT WEEK WITH TYPICAL JUNE-GLOOM DEEP
MARINE LAYER CLOUDS.
AVIATION
031800Z...COAST/VALLEYS...SATELLITE SHOWS LOW CLOUDS ONLY AROUND 2-5
MILES INLAND, QUICKLY RETREATING OFFSHORE. BASES CURRENTLY AROUND
1500FT MSL. SKC AND VFR EXPECTED FOR ALL COASTAL SITES BY 19Z. LOW
CLOUDS MOVE INLAND AGAIN TONIGHT WITH LOWER BASES AROUND 1000-1200FT
MSL AND LESS INLAND EXTENT, GENERALLY AFTER 03Z THUR. LOW CLOUDS MAY
NOT MAKE IT UP TO KSNA UNTIL AFTER 05Z. CLOUDS WILL CLEAR A LITTLE
FASTER ON THURSDAY, POTENTIALLY BY 16-18Z.
MOUNTAINS/DESERTS...VFR CONDITIONS THROUGH THURSDAY. FEW-SCT HIGH
CLOUDS AOA 20,000FT MSL THIS AFTERNOON, OTHERWISE, SKC.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH SUNDAY.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...MUNYAN
AVIATION/MARINE...ZUBER
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