944
FXUS66 KSGX 241007
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
207 AM PST TUE FEB 24 2026
SYNOPSIS
FAIR AND WARMER WEATHER IS EXPECTED THROUGH THE END OF THE WEEK.
THERE WILL BE PERIODS OF HIGH CLOUDS THIS WEEK, ALONG WITH PATCHY
COASTAL FOG WEDNESDAY AND THURSDAY MORNINGS. BRISK WESTERLY WINDS
WILL DEVELOP FOR LATE WEDNESDAY IN THE MOUNTAINS AND DESERTS.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
THROUGH WEDNESDAY...
HIGH PRESSURE CONTINUES TO BUILD IN OVER THE REGION AS THE RIDGE
FURTHER STRENGTHENS WITH A HIGH APPROACHING 590 DM OVER THE PACIFIC
WATERS TO OUR SOUTHWEST. THIS WILL ALLOW FOR CONTINUED WARMING AND
DRYING CONDITIONS. HIGH TEMPERATURES TODAY WILL BE GENERALLY ON
THE SLIGHTLY WARMER SIDE FOR MOST LOCATIONS, AND ESPECIALLY FOR
THE DESERTS. THERE COULD BE A RETURN TO THE MARINE LAYER FOR SOME
OF THE COASTAL LOCATIONS BEGINNING TONIGHT, AND PERHAPS PATCHY
FOG ALONG THE COASTAL SLOPES WHERE IT INTERSECTS, IF IT DOES END
UP FORMING. WEAK OFFSHORE WINDS OVERNIGHT MAY HELP TO PREVENT
THIS.
THURSDAY THROUGH EARLY NEXT WEEK...
THE RIDGE WILL CONTINUE TO EXPAND NORTHWARD WITH TEMPERATURES
GRADUALLY INCREASING EACH DAY THROUGH FRIDAY, WHICH WILL LIKELY BE
THE WARMEST DAY OF THE WEEK FOR MOST LOCATIONS, WITH HIGHS BEING AS
MUCH AS 15-20 DEGREES ABOVE THE SEASONAL AVERAGE FOR THIS TIME OF
YEAR, ESPECIALLY WITHIN THE IE AND LOWER DESERTS. GOING INTO THE
WEEKEND, THE RIDGE WILL FINALLY BEGIN TO BREAK DOWN AS WE TRANSITION
FROM BEING DOMINATED BY A LONGWAVE RIDGE, TO A WEAK LONGWAVE TROUGH,
OVER THE REGION. THIS WILL ALLOW FOR TEMPERATURES TO BEGIN TO COOL
BACK DOWN CLOSER TO THE SEASONAL AVERAGE BY MONDAY. IN TERMS OF
THE MARINE LAYER, BASED ON GUIDANCE AND A PERSISTENCE OF ONSHORE
FLOW RETURNING, THIS SHOULD BECOME MORE PREDOMINANT OVERNIGHT
TOWARDS THE END OF THE WEEK AND INTO THE WEEKEND, AND WILL ALSO
CONTINUE TO LIFT MORE GOING INTO FRIDAY.
A LITTLE BEYOND THE FORECAST PERIOD, THERE IS AT LEAST SOME
AGREEMENT WITH SOME OF THE DETERMINISTIC MEMBERS OF SPLIT FLOW
LEADING TO A POSSIBLE CUT-OFF UPPER LEVEL LOW BECOMING STALLED OUT
OVER THE REGION BY THE MIDDLE OF NEXT WEEK, WHICH MAY HELP TO
INCREASE OUR CHANCES OF PRECIPITATION, AND ALSO HELP TO KEEP US ON
THE COOLER SIDE.
AVIATION
241030Z...MOSTLY CLEAR AND VFR CONDITIONS TODAY AND TONIGHT.
VARIABLE HIGH CLOUDS AOA 20000 FEET MSL. PATCHY COASTAL FOG AFTER
06Z INTO WEDNESDAY (10-30% CHANCE) WOULD BE BASED AROUND 200-400
FEET MSL WITH VIS 1-5SM AT IMMEDIATE COAST. CIGS/VIS ISSUES NOT
LIKELY TO IMPACT COASTAL AIRPORTS.
MARINE
NO HAZARDOUS MARINE CONDITIONS EXPECTED THROUGH SATURDAY.
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...STEWEY
AVIATION/MARINE...MM
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