390
FXUS66 KSGX 021651
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
851 AM PST SUN NOV 2 2025
SYNOPSIS
LOCALLY DENSE FOG THIS MORNING FOLLOWED BY ABOVE NORMAL
TEMPERATURES THIS AFTERNOON. A TROUGH OF LOW PRESSURE WILL DEVELOP
ALONG THE WEST COAST THIS WEEK, LEADING TO A SUBTLE COOLING TREND, A
DEEPER MARINE LAYER, AND BREEZY WINDS IN THE MOUNTAINS AND DESERTS.
DRY WEATHER WILL PREVAIL WITH A WARMING TREND LATE IN THE WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
MORNING UPDATE
LOW CLOUDS CONTINUE TO RETREAT TOWARD THE COAST. THIS MORNING'S
SOUNDING SHOWS A CONTINUED SHALLOW MARINE LAYER WITH A DEPTH NEAR
900 FEET. THIS WILL MAKE IT HARDER FOR THE ATMOSPHERE TO MIX OUT,
WHERE INTERMITTENT LOW CLOUDS WILL OCCUR AT THE BEACHES THROUGHOUT
THE DAY. A TROUGH TO THE NORTH WILL BEGIN TO DEEPEN THE MARINE
LAYER LATER TODAY INTO MONDAY AS MODELS SHOW LOW CLOUDS AND LESS
FOG MOVING FURTHER INLAND INTO THE VALLEYS, POTENTIALLY INTO THE
INLAND EMPIRE BY MONDAY MORNING. THE FORECAST REMAINS ON TRACK
FOR THE UPCOMING WEEK.
PREVIOUS DISCUSSION (230 AM SUNDAY)
COASTAL LOW CLOUDS AND FOG HAVE PUSHED INTO THE COASTAL AREAS AND
FAR WESTERN VALLEYS THIS MORNING, WITH A BONUS POCKET OF RADIATION
FOG BEGINNING TO DEVELOP WESTERN IN THE INLAND EMPIRE. LOCALLY DENSE
FOG IS OCCURRING ALONG THE I-15 IN THE SAN DIEGO COUNTY. ELSEWHERE
SKIES ARE CLEAR. LOW CLOUDS AND FOG WILL CLEAR TOWARDS THE COAST BY
LATE MORNING, FOLLOWED BY ANOTHER WARM AND SUNNY DAY WITH HIGHS
AROUND 5-12 DEGREES ABOVE NORMAL INLAND. A WEAK UPPER LEVEL LOW WILL
MOVE EASTWARD ACROSS SO CAL LATER TODAY, BUT THE MOST THIS WILL DO
IS BRING SOME SCATTERED HIGH CLOUDS LATER THIS AFTERNOON.
WEAK TROUGHING ALONG THE WEST COAST WILL BRING A GRADUAL COOLING
TREND THIS WEEK. THE MARINE LAYER WILL SLOWLY DEEPEN WITH NIGHT AND
MORNING LOW CLOUDS EXTENDING FURTHER INLAND, AND DENSE FOG BECOMING
LESS OF A CONCERN. A SHORT WAVE MOVING THROUGH THE MEAN FLOW ON
WEDNESDAY WILL BRING AN UPTICK IN BREEZY WEST WINDS IN THE MOUNTAINS
AND DESERTS. WEDNESDAY NOW LOOKS TO BE THE COOLEST DAY WITH HIGHS
SLIGHTLY BELOW NORMAL WEST OF THE MOUNTAINS (HIGHS IN THE 70S), BUT
STILL A FEW DEGREES ABOVE NORMAL IN THE MOUNTAINS AND DESERTS.
AN UPPER LEVEL RIDGE AMPLIFIES TO THE SOUTHWEST ON FRIDAY AS ANOTHER
LOW DEEPENS OVER THE EAST PAC, THEN SHIFTS EASTWARD OVER SO CAL OVER
THE WEEKEND. WEAK OFFSHORE FLOW DEVELOPS DURING THIS TIME AS WELL AS
SURFACE HIGH PRESSURE BUILDS OVER THE GREAT BASIN.
THIS WILL BRING ANOTHER ROUND OF WARMER AND DRIER WEATHER WITH HIGH
TEMPERATURES SEVERAL DEGREES ABOVE NORMAL. WHILE THE NEXT 7 DAYS
REMAIN DRY, ALL OF THE GLOBAL ENSEMBLES ARE HINTING AT PRECIPITATION
TOWARDS THE MIDDLE OF THE MONTH.
AVIATION
021600Z...COASTS/VALLEYS...SATELLITE SHOWS LOW CLOUDS BASED 700-
1100FT MSL ARE QUICKLY PULLING BACK TO THE COASTLINE, WITH MOST
COASTAL TAF SITES EXPECTED TO BE VFR BY 17Z. VIS REMAINS 3-6SM FOR
MOST LOCATIONS, IMPROVING OVER THE NEXT TWO HOURS. CLOUDS MAY LINGER
JUST OFFSHORE THROUGH THE AFTERNOON BEFORE PUSHING INLAND AGAIN AS
EARLY AS 00Z MON WITH SIMILAR OR SLIGHTLY HIGHER BASES AND SIMILAR
INLAND EXTENT. BASES MAY FALL A BIT OVERNIGHT BY 100-200FT GENERALLY
AFTER 07Z. VIS WILL BE 2-6SM, WITH LOCALLY LOWER AT COASTAL TERRAIN
AND AREAS AROUND OR ABOVE 600FT. 30-40% CHANCE OF A CIG AT KONT,
GENERALLY AFTER 08Z. CLOUDS SHOULD CLEAR BACK TOWARDS THE COAST AT A
SIMILAR TIME AS TODAY, AROUND 17Z MON.
MOUNTAINS/DESERTS...VFR CONDITIONS PREVAIL THROUGH THE PERIOD.
MARINE
NO HAZARDOUS MARINE CONCERNS THROUGH THURSDAY.
SKYWARN
SKYWARN ACTIVATION IS NOT REQUESTED. HOWEVER WEATHER SPOTTERS ARE
ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS.
SGX WATCHES/WARNINGS/ADVISORIES
CA...NONE.
PZ...NONE.
UPDATE...APR
PUBLIC...SS
AVIATION/MARINE...ZUBER
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