136
FXUS66 KSGX 191029
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
229 AM PST WED FEB 19 2025
SYNOPSIS
THROUGH FRIDAY, WARMER WEST OF THE MOUNTAINS AND A LITTLE COOLER
FOR THE MOUNTAINS AND DESERTS ON THURSDAY AND FRIDAY. THERE WILL
BE PATCHY LATE NIGHT AND EARLY MORNING LOW CLOUDS NEAR THE COAST.
THERE WILL BE GUSTY NORTHERLY WINDS ALONG AND BELOW THE COASTAL
SLOPES OF THE MOUNTAINS FOR THURSDAY AND THURSDAY NIGHT WITH THE
STRONGER GUSTS NEAR THE CAJON PASS TO 40 TO 50 MPH. THE WINDS WILL
BECOME MORE NORTHEASTERLY ON FRIDAY AND SPREAD SOUTHWARD INTO SAN
DIEGO COUNTY WITH THE STRONGER GUSTS TO 30 TO 40 MPH. WARMER AND
DRY FOR SATURDAY THROUGH WEDNESDAY. HIGH TEMPERATURES WILL WARM
FOR SATURDAY THROUGH MONDAY WITH CONTINUED SLOWER WARMING FOR
INLAND AREAS THROUGH WEDNESDAY. HIGH TEMPERATURES FOR MONDAY
THROUGH WEDNESDAY FOR THE MOUNTAINS, DESERTS, AND INLAND VALLEYS
WILL BE GENERALLY 12 TO 18 DEGREES ABOVE AVERAGE.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
SHORT TERM (TODAY THROUGH FRIDAY)
A WEAK COASTAL EDDY WILL CONTINUE DURING THE NIGHTS AND MORNINGS
INTO FRIDAY WITH PATCHY LATE NIGHT AND EARLY MORNING LOW CLOUDS
AND FOG NEAR THE COAST. THERE WILL BE WARMING FOR THE COAST AND
VALLEYS FOR TODAY THROUGH FRIDAY WITH THE GREATER WARMING FOR
THURSDAY AND FRIDAY. THE MOUNTAINS AND DESERTS WILL BE A FEW
DEGREES COOLER ON THURSDAY AND ANOTHER DEGREE OR TWO COOLER ON
FRIDAY. THERE WILL BE WEAK OFFSHORE FLOW FOR THURSDAY AND FRIDAY.
FOR THURSDAY MORNING INTO THURSDAY NIGHT, THERE WILL BE GUSTY
NORTHERLY WINDS ALONG AND BELOW THE COASTAL SLOPES OF THE
MOUNTAINS WITH THE STRONGER GUSTS NEAR THE CAJON PASS TO 40 TO 50
MPH. THE WINDS WILL BECOME MORE NORTHEASTERLY BY FRIDAY MORNING,
SPREADING SOUTHWARD IN SAN DIEGO COUNTY AND CONTINUING INTO FRIDAY
AFTERNOON WITH THE STRONGER GUSTS TO 30 TO 40 MPH.
LONG TERM (SATURDAY THROUGH TUESDAY)
HIGH PRESSURE ALOFT WILL BE ACROSS SOUTHERN CALIFORNIA FOR
SATURDAY THROUGH WEDNESDAY. THERE WILL BE CONTINUED DRY WEATHER
WITH WARMING FOR THE COAST AND VALLEYS THROUGH MONDAY WITH SLOWER
WARMING CONTINUING FOR THE MOUNTAINS AND DESERTS THROUGH WEDNESDAY.
SOME NIGHT AND MORNING LOW CLOUDS COULD RETURN NEAR THE COAST FOR
EARLY TUESDAY AND EARLY WEDNESDAY. WITH THE WARMING, HIGH
TEMPERATURES FOR MONDAY THROUGH WEDNESDAY FOR THE MOUNTAINS,
DESERTS, AND INLAND VALLEYS WILL BE GENERALLY 12 TO 18 DEGREES
ABOVE AVERAGE WITH HIGH TEMPERATURES FOR THE VALLEYS IN THE MID
70S TO MID 80S AND IN THE LOWER DESERTS IN THE UPPER 80S TO AROUND
90.
AVIATION
190945Z...COAST/VALLEYS...VERY PATCHY LOW CLOUDS EXPECTED TO DEVELOP
WITHIN ABOUT 10 MILES OF THE COAST 10-14Z THIS MORNING, WITH A 60%
CHANCE FOR CIGS IN PARTS OF ORANGE AND SAN DIEGO COUNTIES, INCLUDING
KSAN, BY 13Z. CLOUDS WILL BE BASED AROUND 600-900 FT MSL, AND
LOCALIZED VIS REDUCTIONS 3-6 SM ARE POSSIBLE OVER THE COASTAL
MESAS/HIGHLANDS. CLOUDS THAT DEVELOP WILL SCATTER OUT BY 17-18Z THIS
MORNING. MORE EXTENSIVE LOW CLOUDS DEVELOP LATE THIS EVENING/TONIGHT
AND MOVE INLAND UP TO ABOUT 10 MILES OVERNIGHT, WITH SIMILAR BASES.
LOW TO MODERATE CONFIDENCE IN TIMING OF CLOUDS, WITH A 40% CHANCE
FOR CIGS AT COASTAL SITES BY 05-06Z THU INCREASING TO 60% BY 09-10Z.
MOUNTAINS/DESERTS...SCT-BKN HIGH CLOUDS ABOVE 25,000 FT MSL AND VFR
CONDITIONS THROUGH TONIGHT.
MARINE
NO HAZARDOUS MARINE CONDITIONS ARE ANTICIPATED THROUGH SATURDAY.
BEACHES
LONG-PERIOD WEST SWELL WILL EASE SOMEWHAT TODAY AND TONIGHT, LEADING
TO DIMINISHING SURF HEIGHTS. SETS TO 6 FEET CONTINUE TO BE POSSIBLE
FOR WEST-FACING BEACHES THIS MORNING AND AFTERNOON, LEADING TO
ENHANCED RISK FOR RIP CURRENTS AND SOME DANGEROUS SWIMMING
CONDITIONS.
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...17
AVIATION/MARINE/BEACHES...CSP
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