332
FXUS66 KSGX 220442
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
842 PM PST SAT FEB 21 2026
SYNOPSIS
GRADUAL WARMING AND DRY WEATHER THROUGH FRIDAY WITH HIGHS
INCREASING TO AS MUCH AS 10 TO 20 DEGREES ABOVE NORMAL. PATCHY
MARINE LAYER LOW CLOUDS MAY DEVELOP TUESDAY INTO WEDNESDAY AS
ONSHORE FLOW DEVELOPS, OTHERWISE VARIABLE HIGH CLOUD COVER AND
WEAK OFFSHORE FLOW WILL PREVAIL FOR MUCH OF THE WEEK.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
EVENING UPDATE...
SCATTERED HIGH CLOUDS ARE MOVING EAST ACROSS THE REGION THIS
EVENING ALONG THE NORTH EDGE OF A WEAK UPPER LEVEL RIDGE OF HIGH
PRESSURE. SURFACE PRESSURE GRADIENTS REMAIN WEAKLY OFFSHORE,
CURRENTLY AROUND -2.5 LAX-DAG AND -5.4 SAN-TPH. WEAK OFFSHORE FLOW
COMBINED WITH THE NORMAL DRAINAGE FLOW/LAND BREEZE SHOULD BE
ENOUGH TO PREVENT ANY FOG DEVELOPMENT TONIGHT, AND HREF
PROBABILITIES OF LOW CLOUDS/FOG ARE LESS THAN 10%. TONIGHT WON'T
BE NEARLY AS COLD AS LAST NIGHT, WITH HIGHS GENERALLY IN THE UPPER
30S TO UPPER 40S WEST OF THE MOUNTAINS AND IN THE LOW DESERTS, LOW
TO MID 30S IN THE HIGH DESERT, AND LOW 20S TO UPPER 30S IN THE
MOUNTAINS. NO CHANGES TO THE FORECAST THIS EVENING WITH WARMER
AND DRY WEATHER PREVAILING THROUGH THE WEEK.
PREVIOUS DISCUSSION...
A WARMING TREND HAS BEGUN TODAY AS A HIGH PRESSURE RIDGE BUILDS
OVER THE WESTERN US. THIS RIDGE WILL DOMINATE OUR WEATHER PATTERN
THROUGH NEXT WEEK, BRINGING FAIR AND WARM WEATHER. TEMPERATURES
WILL TREND UPWARD THROUGH MONDAY THEN FLUCTUATE FROM DAY TO DAY
PEAKING AGAIN NEXT FRIDAY. ON MONDAY, TEMPERATURES WILL REACH THE
LOW 80S IN THE INLAND VALLEYS AND LOWER DESERTS...ANYWHERE FROM 8
TO 15 DEGREES ABOVE SEASONAL AVERAGES. ALL OTHER AREAS WILL ALSO
BE WARMER THAN NORMAL. NEXT FRIDAY, TEMPERATURES WILL BE IN THE
MID TO UPPER 80S WEST OF THE MTNS AND IN THE LOW 90S IN THE LOWER
DESERTS...12 TO 18 DEGREES ABOVE SEASONAL AVERAGES.
TIMING THE RETURN OF MARINE LAYER CLOUDS/FOG IN THE COASTAL AREAS
IS UNCERTAIN AT BEST BUT IT SEEMS UNLIKELY THAT THEY WILL RETURN
BEFORE TUESDAY. SOME MODELS INDICATE A RETURN OF THE MARINE LAYER
CLOUDS/FOG FOR NEXT WEDNESDAY AS A SHORTWAVE TROUGH PASSES TO THE
NORTH AND WEAKENS THE RIDGE BUT CONFIDENCE IN THIS OUTCOME REMAINS
LOW.
AVIATION
220600Z...VFR AND MOSTLY CLEAR SKIES EXPECTED THROUGH THE TAF
PERIOD. FEW-SCT CIRRUS AOA 25,000FT MSL PERSISTING INTO SUNDAY
EVENING.
MARINE
NO MARINE HAZARDS ARE EXPECTED 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.
PUBLIC...SS/PG
AVIATION/MARINE...MUNYAN
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