049
FXUS66 KSGX 282005
AFDSGX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN DIEGO CA
105 PM PDT THU AUG 28 2025
SYNOPSIS
TROPICAL REMNANTS FROM THE SOUTH CONTINUE TO STREAM OVER THE AREA
WITH CLOUDY SKIES AND LIGHT SHOWERS ACROSS SOUTHERN AND EASTERN
PORTIONS OF THE REGION. DRIER, SUNNIER AND LESS HUMID WEATHER WILL
OCCUR BY FRIDAY INTO THE WEEKEND WITH MINIMAL CHANCES FOR STORMS
ACROSS THE MOUNTAINS. MONSOONAL MOISTURE WILL INCREASE AGAIN BY
EARLY NEXT WEEK, WITH NOTABLE CHANCES FOR STORMS TO RETURN TO THE
MOUNTAINS AND DESERTS BY TUESDAY INTO THE MIDDLE OF NEXT WEEK.
OTHER AREAS WILL SEE SLIGHTLY WARMER CONDITIONS WITH HIGHS UP TO 5
DEGREES ABOVE NORMAL.
DISCUSSION...FOR EXTREME SOUTHWESTERN CALIFORNIA INCLUDING ORANGE
SAN DIEGO...WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO
COUNTIES...
A THICK SHIELD OF CLOUDS IS SEEN ON SATELLITE IMAGERY AS A REMNANT
TROPICAL LOW SITS QUITE STATIONARY WEST OF BAJA CALIFORNIA. THIS
SYSTEM HAS BROUGHT LIGHT SHOWERS TO THE REGION, CLOUDY SKIES, AND
ANOTHER HUMID DAY ACROSS THE REGION. MOST PLACES ACROSS THE SAN
DIEGO METRO HAVE RECEIVED UNDER ONE TENTH OF AN INCH OF RAINFALL
SO FAR, WITH SOME SPOTS CLOSER TO ONE HALF INCH EAST OF THAT AREA
IN THE MOUNTAINS. THE MAIN PART OF THE MOISTURE PLUME IS STILL
MOVING NORTHWARD BUT STARTING TO TURN TO THE NORTHEAST AT THIS
HOUR. THIS GIVES HIGHER CONFIDENCE IN VERY LITTLE IF ANY RAIN
EXPECTED TO FALL IN PARTS OF ORANGE COUNTY, THE NORTHERN HALF OF
INLAND EMPIRE AND THE HIGH DESERT. THE CLOUDS FROM THIS SYSTEM
WILL BEGIN TO PARTIALLY CLEAR FOR AREAS WEST OF THE MOUNTAINS AS
EARLY AS LATER THIS AFTERNOON. ANOTHER BEAUTIFUL SUNSET FROM THESE
HIGH CLOUDS MAY OCCUR PORTIONS OF THE AREA AGAIN THIS EVENING, SO
BE ON THE LOOKOUT!
A WARMER AND SLIGHTLY LESS HUMID WEATHER WILL OCCUR ON FRIDAY
WITH MOSTLY SUNNY SKIES. THERE WILL BE DRYING, BUT A WEAK AMOUNT
OF MONSOONAL MOISTURE WILL BE AVAILABLE TO WARRANT A SLIGHT CHANCE
FOR A SHOWER OR WEAK THUNDERSTORM TO FORM OVER THE MOUNTAINS. THE
ATMOSPHERE CONTINUES TO DRY OUT OVER THE WEEKEND WITH PWAT VALUES
LOWERING UNDER ONE INCH ACROSS THE LOWER DESERTS BY THE WEEKEND.
THIS WILL DIMINISH ANY NOTABLE CHANCES FOR STORM ACTIVITY BY THE
WEEKEND WITH ALL OTHER AREAS SEEING MOSTLY SUNNY SKIES. A WARMING
TREND WILL ALSO OCCUR FOR AREAS AWAY FROM THE COAST DURING THIS
TIME. HIGHS WILL BE NEAR TO SLIGHTLY ABOVE AVERAGE BY SUNDAY.
MONSOONAL MOISTURE WILL INCREASE AGAIN BY LABOR DAY INTO THE MIDDLE
OF NEXT WEEK, WHICH WILL LEAD TO A GREATER CHANCE OF SHOWER AND
THUNDERSTORMS ACROSS THE MOUNTAINS AND DESERTS. BY TUESDAY THROUGH
THURSDAY, CHANCES WILL BE AROUND 20-30% ACROSS THESE AREAS. A WEAK
TROUGH OFFSHORE MAY START TO FORM SOMETIME IN THE MIDDLE OF NEXT
WEEK, WHICH WOULD LOWER THE CHANCES FOR ANY STORMS TO OCCUR. OTHER
AREAS WILL REMAIN QUIET WITH NEAR TO SLIGHTLY ABOVE NORMAL
TEMPERATURES.
AVIATION
281950Z...WIDESPREAD CLOUDS AT OR ABOVE 10000 FEET MSL THROUGH THIS
EVENING, DECREASING EARLY FRIDAY. A FEW PATCHES OF COASTAL LOW
CLOUDS VCNTY COASTAL TAF SITES WITH BASES AROUND 1000 FEET MSL.
PERIODS OF CIG IMPACTS ARE POSSIBLE WITH PROBABILITIES <40 PERCENT
THROUGH 08Z FRIDAY. CHANCES OF -RA, PEAKING THIS AFTERNOON, AND
DECREASING THIS EVENING. -TSRA IS UNLIKELY BUT THE POSSIBILITY
CANNOT BE ELIMINATED, WITH GUSTY WINDS NEAR ANY STORMS THAT MAY
FORM. HIGH CLOUDS WILL THIN AND SCATTER FRIDAY MORNING.
MARINE
FOR TODAY, THUNDERSTORMS ARE UNLIKELY BUT THE POSSIBILITY CANNOT BE
ELIMINATED. ANY THUNDERSTORMS THAT FORM COULD PRODUCE GUSTY, ERRATIC
WINDS LEADING TO LOCALLY ROUGH SEAS. OTHERWISE, 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...PG
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