732
FXUS66 KSGX 061807
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1107 AM PDT SAT JUN 6 2026
SYNOPSIS
COOLER WEATHER FOR INLAND AREAS IS EXPECTED THIS WEEKEND INTO THE
FIRST HALF OF NEXT WEEK AS A TROUGH OF LOW PRESSURE MOVES OVER THE
REGION. THIS WILL ALSO BRING BREEZY CONDITIONS ACROSS THE
MOUNTAINS AND DESERTS THIS AFTERNOON AND TOMORROW AFTERNOON. HIGH
PRESSURE LOOKS TO EXPAND OVER THE WEST COAST BY THE LATTER HALF
OF NEXT WEEK, WHICH WOULD LEAD TO A WARMING TREND.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..UPDATED AVIATION DISCUSSION FOR 18Z TAFS
TODAY THROUGH TOMORROW NIGHT...
CURRENT SATELLITE IMAGERY REVEALS THAT THE MARINE LAYER HAS FORMED
AND FILLED IN ALONG THE COASTAL AREAS FOR SAN DIEGO AND ORANGE
COUNTIES, AND EXTENDS ROUGHLY AROUND 10 TO 15 MILES INLAND WITH
BASES OF AROUND 1500 TO 2000 FT ELEVATION. GIVEN HOW STRONG THE
INVERSION IS IN PLACE OVER THE REGION, IT IS LIKELY THAT THE MARINE
LAYER WILL STRUGGLE TO MIX OUT AND DISSIPATE LATER THIS AFTERNOON,
ESPECIALLY FOR LOCATIONS RIGHT ALONG THE COAST, WHERE THERE WILL
LIKELY BE LOW CLOUDS LINGERING THROUGHOUT THE AFTERNOON.
HIGH PRESSURE CONDITIONS CONTINUE TO DOMINATE THE REGION, HOWEVER,
THERE IS A MAJOR SHORTWAVE TROUGH UPSTREAM THAT IS ADVANCING
EASTWARD AND BEGINNING TO INFLUENCE THE AREA WITH COOLER
TEMPERATURES WITH A BETTER PUSH OF ONSHORE FLOW, AND BREEZY
CONDITIONS, ESPECIALLY FOR THE MOUNTAINS AND AREAS PRONE TO GUSTY
WINDS. THESE WINDS ARE NOT EXPECTED TO REACH ADVISORY LEVEL,
ALTHOUGH THERE MAY BE A FEW OCCASIONAL GUSTS APPROACHING 60 MPH
WITHIN THE SAN GORGONIO PASS. BY LATER THIS EVENING, THESE WINDS
WILL BEGIN TO DECOUPLE OVERNIGHT, BUT THEN PICK BACK UP TO BE GUSTY
AGAIN ON SUNDAY DURING THE AFTERNOON, BEING SLIGHTLY WEAKER.
TEMPERATURES WILL BE AROUND THE SAME FOR HIGHS ON SUNDAY, PERHAPS
JUST A SMIDGEN WARMER.
MONDAY THROUGH FRIDAY...
THERE HAS BEEN VERY LITTLE CHANGE IN THE EXTENDED FORECAST SINCE
PREVIOUS MODEL RUNS. AS THE TROUGH EXITS THE REGION TOWARDS THE
MIDDLE OF THE WEEK, AND AS THE OVERALL LONGWAVE PATTERN BEGINS TO
SHIFT MORE EAST AND ALLOWS A RIDGE OVER THE E PAC WATERS TO EXPAND
OVER THE WEST COAST REGION, IT WILL ALLOW FOR THERE TO BE A
GRADUAL WARMING TREND OCCURRING TOWARDS THE END OF THE UPCOMING
WEEK. THIS WILL ALSO ALLOW FOR THE MARINE LAYER TO LOWER WITH
POSSIBLE VIS RESTRICTION IMPACTS AS A RESULT CLOSER TO THE COASTAL
AREAS. CONDITIONS ARE EXPECTED TO REMAIN DRY THROUGH THEN.
AVIATION
061800Z...COAST/VALLEYS...LOW CLOUDS 1800-2200 FT MSL ARE LINGERING
ALONG THE IMMEDIATE COAST THIS MORNING. SCATTERING POSSIBLE 19-23Z
TODAY FOR COASTAL SITES, HIGHER CHANCES FOR NORTH SD COUNTY/ORANGE
COUNTY. SCATTER OUT FOR SOUTH SD COUNTY LIKELY TO BE INTERMITTENT
AND BRIEF, WITH SUSTAINED BKN CIGS FOR MOST OF THE DAY. CLOUDS MOVE
BACK INLAND AFTER 23Z THIS AFTERNOON, REACHING INTO PARTS OF THE
INLAND VALLEYS SIMILAR TO THIS MORNING OVERNIGHT, WITH SIMILAR BASES
1800-2300 FT MSL.
MOUNTAINS/DESERTS...VFR WITH CLOUDS AOA 20000FT MSL THROUGH THIS
EVENING. SOUTHWEST-WEST WINDS WILL INCREASE IN THE MOUNTAINS AND
DESERTS TODAY WITH GUSTS REACHING 30-40 KNOTS AFTER 19Z. WINDS
SLOWLY DECREASE LATE THIS EVENING AND OVERNIGHT. MOD UP/DOWNDRAFTS
AND POCKETS OF LLWS IN LEE (NORTH AND EAST) OF MOUNTAINS.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH WEDNESDAY NIGHT.
BEACHES
A SERIES OF LONG PERIOD (17-19 SECOND) SWELLS FROM THE SOUTH (200
DEGREES) WILL RESULT IN ELEVATED SURF THIS WEEKEND. SURF 4-6 FEET AT
SOUTH FACING BEACHES REMAINS THROUGH THIS EVENING, BEFORE SWELL AND
SURF DIMINISHES SLIGHTLY ON SUNDAY. SURF BUILDS AGAIN MONDAY AS A
FRESH 3-4 FOOT SWELL AT 18-19 SECONDS MOVES INTO THE REGION. SURF
PEAKS TUES-WED WITH SETS TO 5-8 FEET LIKELY AT SOUTH-FACING BEACHES,
THEN GRADUALLY DIMINISHES LATE NEXT WEEK.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
PUBLIC...STEWEY
AVIATION/MARINE...CSP
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