094
FXUS66 KSGX 241756
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
956 AM PST TUE FEB 24 2026
SYNOPSIS
FAIR AND WARMER WEATHER WITH VARIABLE HIGH CLOUDS THROUGH THE END
OF THE WEEK, ALONG WITH PATCHY COASTAL LOW CLOUDS AND FOG
WEDNESDAY AND THURSDAY MORNINGS. BRISK WESTERLY WINDS WILL DEVELOP
FOR LATE WEDNESDAY MAINLY IN THE MOUNTAINS AND HIGH DESERTS.
COOLER WITH INCREASING CLOUDS FOR EARLY NEXT WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
..NEW AVIATION DISCUSSION FOR THE 18Z TAF PACKAGE
VARIABLE HIGH CLOUDS THIS MORNING UNDER AN EXTENSIVE RIDGE OF HIGH
PRESSURE OVER THE WESTERN US. TEMPERATURES ARE MOSTLY NEAR OR A
FEW DEGREES HIGHER THAN AT THIS TIME YESTERDAY EXCEPT IN THE MTNS
AND HIGH DESERTS WHERE TEMPS COULD BE AS MUCH AS 10-15 DEGREES
HIGHER. SURFACE PRESSURE GRADIENTS ARE WEAKLY OFFSHORE TO THE
NORTHEAST WITH -1.9 MB SAN-TPH BUT ARE TRENDING ONSHORE, AND ARE
ALREADY ONSHORE TO THE EAST WITH 2.6 MB SAN-TRM.
THE RIDGE OF HIGH PRESSURE WILL CONTINUE TO DOMINATE OUR WEATHER
INTO THE WEEKEND AND THE WARMING TREND WILL CONTINUE THROUGH
FRIDAY. HIGH TEMPERATURES TODAY ARE EXPECTED TO BE IN THE UPPER
60S TO MID 70S NEAR THE COAST, IN THE UPPER 70S TO LOW 80S IN THE
INLAND VALLEYS, THE 50S TO 60S IN THE MTNS, THE UPPER 70S IN THE
HIGH DESERTS AND IN THE UPPER 80S IN THE LOW DESERTS. THESE TEMPS
ARE AS MUCH AS 13-17 DEGREES ABOVE SEASONAL AVERAGES IN THE
VALLEYS, MTNS AND DESERTS. FRIDAY WILL LIKELY BE THE WARMEST DAY,
WITH TEMPERATURES AS MUCH AS 20 DEGREES ABOVE SEASONAL AVERAGES IN
THE VALLEYS, MTNS AND DESERTS. TEMPERATURES ON SATURDAY LOWER
SLIGHTLY AS THE UPPER RIDGE WEAKENS BUT WILL REMAIN 15-20 DEGREES
ABOVE SEASONAL AVERAGES.
AT THE SURFACE, THE FLOW BEGINS TO TURN ONSHORE TODAY AND PEAKS
WEDNESDAY WITH GUSTY WEST WINDS MAINLY IN THE HIGH DESERTS AND THE
MTNS. ONSHORE FLOW WILL CONTINUE THROUGH THURSDAY BEFORE TURNING
OFFSHORE BRIEFLY ON FRIDAY. THE ONSHORE FLOW WILL LIKELY BRING A
RETURN OF COASTAL MARINE LAYER CLOUDS/FOG FOR TONIGHT/WED MORNING
AND AGAIN FOR WED NIGHT/THU MORNING. HIGH-RESOLUTION ENSEMBLE
MODELS SHOW A 30-40 PERCENT CHANCE OF PATCHY CLOUDS/FOG FOR
TONIGHT/WED MORNING AND A 40-60 PERCENT CHANCE OF MORE WIDESPREAD
LOW CLOUDS/FOG WED NIGHT/THU MORNING. ON FRIDAY, WEAK OFFSHORE
FLOW WILL LIKELY DISRUPT THE MARINE LAYER.
FOR SUNDAY THROUGH NEXT TUESDAY...NUMERICAL MODELS ARE COMING INTO
BETTER AGREEMENT WITH RESPECT TO THE EVOLUTION OF THE SYNOPTIC
PATTERN. AT THIS TIME, WE CAN SAY WITH REASONABLE CONFIDENCE THAT
A LOW PRESSURE SYSTEM FROM THE NORTHWEST WILL MOVE OVER OR CLOSE
TO SOCAL. IT WILL LIKELY BRING INCREASING CLOUDS AND COOLER
CONDITIONS. TEMPERATURES ON MONDAY WILL LOWER TO ABOUT 5-9 DEGREES
ABOVE SEASONAL AVERAGES. THIS SYSTEM COULD ALSO BRING SOME
PRECIPITATION BUT AT THIS TIME THAT SEEMS UNLIKELY AS ONLY ABOUT
25 PERCENT OF ENSEMBLE MEMBERS SHOW ANY CHANCES FOR PRECIP.
AVIATION
241800Z...VFR CONDITIONS EXPECTED THROUGH THE TAF PERIOD. MOSTLY
CLEAR SKIES WITH HIGH CLOUDS AOA 20,000 FT MSL. PATCHY FOG BASED 200-
400 FT MSL IS EXPECTED TO DEVELOP AFTER 06Z ALONG THE IMMEDIATE
COAST WITH A 10-30% CHANCE OF PUSHING INLAND AROUND KSAN AND NORTH
NEAR KSNA. CEILINGS AND VISIBILITIES ARE NOT EXPECTED TO BE
IMPACTFUL TO COASTAL AIRPORTS. PATCHY FOG WILL MOVE OFFSHORE 16-18Z.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH SUNDAY.
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...PG
AVIATION/MARINE...VILLAFANE
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