891
FXUS66 KSGX 262004
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
1204 PM PST THU FEB 26 2026
SYNOPSIS
HIGH PRESSURE OVER THE REGION WILL BRING VERY WARM WEATHER WITH
RECORD-BREAKING TEMPERATURES LIKELY BY FRIDAY INTO SATURDAY. AN
AREA OF LOW PRESSURE WILL APPROACH THE STATE THIS WEEKEND INTO EARLY
NEXT WEEK. THIS WILL BRING GREATER COOLING EACH DAY THROUGH MONDAY
WITH ELEVATED WINDS ACROSS THE MOUNTAINS AND DESERTS AND BETTER
CHANCES FOR COASTAL FOG EACH DAY. WEAK HIGH PRESSURE RETURNS BY THE
MIDDLE OF NEXT WEEK, WHERE SLIGHT WARMING WILL BE EXPECTED.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
A LARGE AREA OF HIGH PRESSURE IS CURRENTLY ANCHORED OVER THE CENTRAL
BAJA CALIFORNIA PENINSULA, AS AN AREA OF LOW PRESSURE SPINS FAR OFF
THE CALIFORNIA COAST. HIGH CLOUDS FROM THE LOW ARE MAINLY OVER
NORTHERN CALIFORNIA, WITH THINNER CIRRUS CLOUDS OVER OUR REGION. THE
RIDGE OF HIGH PRESSURE WILL STRENGTHEN/AMPLIFY TODAY INTO FRIDAY,
BRINGING HOTTER TEMPERATURES OVER THE AREA. HIGH TEMPERATURES WILL
REACH WELL INTO THE 80S EAST OF THE 5 IN ORANGE COUNTY AND EAST OF
THE 15 IN SAN DIEGO COUNTY, WITH MID 90S INTO COACHELLA VALLEY. NOT
MANY RECORDS WILL BE BROKEN THIS AFTERNOON, WITH AREAS OF THE LOWER
DESERTS HAVING THE BEST CHANCE TO DO SO. LOW CONTINUE TO DECREASE
OFF THE COAST THIS AFTERNOON. SOME OF THESE MAY RETURN BY EARLY
FRIDAY MORNING, BUT MODELS SHOW WEAK OFFSHORE FLOW KEEPING THE
CLOUDS PRIMARILY OFFSHORE.
THE RIDGE WILL PEAK IN INTENSITY ON FRIDAY WITH 850 MB TEMPERATURES
RISING NEAR 21C. THIS ACCOMPANIED WITH LIGHT WINDS OVER THE REGION
WILL ALLOW OUR AREA TO WARM TO 15-25 DEGREES ABOVE NORMAL. CHANCES
FOR HIGHS TO REACH 100 DEGREES ARE LOW (10-25%) ACROSS MUCH OF THE
LOWER DESERTS, WITH CLOSER TO 50-60% ACROSS SOUTHERN AREAS OF THE
COACHELLA VALLEY. HIGHS WILL REACH INTO THE LOWER 90S FOR VALLEYS
WEST OF THE MOUNTAINS. MULTIPLE CITIES ARE EXPECTED TO BREAK
RECORDS, INCLUDING AREAS OF THE MOUNTAINS WILL RISE INTO THE NEAR 70
INTO THE LOWER 80S. WHILE SOME CITIES SEE RECORDS 5 DEGREES ABOVE
THE RECORD, SOME CITIES MAY STRUGGLE TO DO SO, ESPECIALLY COASTAL
AREAS, INCLUDING SAN DIEGO AND NEWPORT BEACH. AS THE HIGH BEGINS TO
WEAKEN, ONSHORE FLOW WILL BRING SLIGHT COOLING WEST OF THE
MOUNTAINS. PLENTIFUL 80S ARE STILL EXPECTED FOR THE VALLEYS AND 70S
NEAR THE COAST, WITH THE POTENTIAL FOR DAILY RECORD HIGH
TEMPERATURES TO BE BROKEN YET AGAIN. WINDS WILL ALSO INCREASE ALONG
THE MOUNTAIN DESERT SLOPES INTO THE DESERTS WITH WINDS 20-35 MPH AT
TIMES. THESE AREAS WILL SEE BREEZY CONDITIONS THROUGH NEXT MONDAY.
THE AREA OF LOW PRESSURE OFF THE COAST TODAY WILL BEGIN TO MOVE
CLOSER TO THE COAST THIS WEEKEND, BRINGING CONTINUED COOLER WEATHER
BY SUNDAY AS IT MOVES INLAND OVER NORTHERN CALIFORNIA. HIGH ACROSS
THE MOUNTAINS AND WESTERN VALLEYS WILL BE AROUND 10 DEGREES COOLER
BY THIS TIME VS. FRIDAY, AROUND 5 DEGREES ACROSS THE COACHELLA
VALLEY. AS THE LOW PRESSURE SYSTEM MOVES OVER NORTHERN CALIFORNIA,
THE COOLEST WEATHER OF THE WEEK WILL OCCUR BY MONDAY AND TUESDAY.
HIGHS WILL BE NEAR TO SLIGHTLY ABOVE AVERAGE. THE WEATHER SYSTEM
WILL ALSO BRING A BUILDING MARINE LAYER WITH BEST CHANCES FOR FOG TO
RETURN TO THE COASTAL AREAS BY THIS WEEKEND INTO EARLY NEXT WEEK.
A WEAK AREA OF HIGH PRESSURE WILL MOVE OVER THE REGION BY EARLY NEXT
WEEK, BRINGING NEAR AVERAGE TEMPERATURES. ANOTHER AREA OF LOW
PRESSURE IS EXPECTED TO MOVE IN FROM THE NORTH BY WEDNESDAY INTO
THURSDAY OF NEXT WEEK. MODELS CONTINUE TO SHOW A TREND OF THE SYSTEM
MOVING FURTHER INLAND, WHERE THE CHANCE FOR ANY PRECIPITATION
CONTINUES TO DECREASE. HIGH PRESSURE OFF THE COAST WILL ALSO BUILD
SLIGHTLY DURING THIS TIME AS WELL, SO WE ARE LOOKING MORE LIKELY TO
SEE SLIGHT WARMING WITH CONTINUED DRIER WEATHER. AS THE LOW PRESSURE
SYSTEM PASSES BY THE REGION, WE WILL ALSO HAVE TO KEEP AN EYE ON
SANTA ANA WINDS THAT MAY SHOW UP BY THE END OF NEXT WEEK.
AVIATION
261725Z...COAST...FEW-SCT HIGH CLOUDS AOA 20K FT MSL THROUGH THIS
AFTERNOON. FOG WITH BKN CIGS 200-400 MSL CONTINUES TO LOOK LESS
LIKELY (10-20%) TO IMPACT COASTAL AIRPORTS AFTER 08Z-15Z FRIDAY.
OTHERWISE...MOSTLY CLEAR AND VFR CONDITIONS TODAY INTO FRIDAY.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE EXPECTED THROUGH MONDAY.
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...APR
AVIATION/MARINE...APR
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