979
FGUS76 KSGX 050956
ESFSGX
HYDROLOGIC FORECAST FOR EXTREME SOUTHWESTERN CALIFORNIA
NATIONAL WEATHER SERVICE SAN DIEGO CA
256 AM PDT FRI SEP 5 2025
..FLASH FLOOD POTENTIAL INDEX FOR EXTREME SOUTHWESTERN CALIFORNIA
SYNOPSIS
COVERAGE AND INTENSITY OF THUNDERSTORMS FOR THIS AFTERNOON FOR THE
MOUNTAINS AND DESERTS IS EXPECTED TO BE SIMILAR TO THURSDAY
AFTERNOON WITH THE GREATEST COVERAGE AND RAINFALL AMOUNTS OVER THE
MOUNTAINS OF SAN DIEGO AND RIVERSIDE COUNTIES WITH THE HIGHEST
HREF 90TH PERCENTILE HOURLY RAINFALL IS AROUND 0.9 INCH FOR THIS
AFTERNOON AND AROUND 0.5 INCH FOR SATURDAY AFTERNOON WITH LESSER
COVERAGE AND AMOUNTS. ISOLATED FLASH FLOODING IS POSSIBLE, MAINLY
FOR THE MOUNTAINS IN SAN DIEGO AND RIVERSIDE COUNTIES FOR THIS
AFTERNOON.
CAZ056-058-060230-
RIVERSIDE COUNTY MOUNTAINS-SAN DIEGO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF IDYLLWILD-PINE COVE, JULIAN,
AND PINE VALLEY
256 AM PDT FRI SEP 5 2025
TODAY...MODERATE
THUNDERSTORMS ARE EXPECTED TO DEVELOP AND
ISOLATED FLASH FLOODING IS POSSIBLE.
SATURDAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
CAZ055-060230-
SAN BERNARDINO COUNTY MOUNTAINS-
INCLUDING THE CITIES OF CRESTLINE, LAKE ARROWHEAD, BIG BEAR CITY,
BIG BEAR LAKE, RUNNING SPRINGS, AND WRIGHTWOOD
256 AM PDT FRI SEP 5 2025
TODAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
SATURDAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
CAZ060-060230-
APPLE AND LUCERNE VALLEYS-
INCLUDING THE CITIES OF VICTORVILLE, HESPERIA, APPLE VALLEY,
AND LUCERNE VALLEY
256 AM PDT FRI SEP 5 2025
TODAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
SATURDAY...NONE
NO FLASH FLOODING IS EXPECTED.
CAZ061-062-065-060230-
COACHELLA VALLEY-SAN DIEGO COUNTY DESERTS-
SAN GORGONIO PASS NEAR BANNING-
INCLUDING THE CITIES OF INDIO, PALM SPRINGS, CATHEDRAL CITY,
PALM DESERT, PALM DESERT COUNTRY, LA QUINTA, COACHELLA,
AND BORREGO SPRINGS
256 AM PDT FRI SEP 5 2025
TODAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
SATURDAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
CAZ048-060230-
SAN BERNARDINO AND RIVERSIDE COUNTY VALLEYS-THE INLAND EMPIRE-
INCLUDING THE CITIES OF RIVERSIDE, SAN BERNARDINO, ONTARIO,
MORENO VALLEY, FONTANA, RANCHO CUCAMONGA, AND CORONA
256 AM PDT FRI SEP 5 2025
TODAY...NONE
NO FLASH FLOODING IS EXPECTED.
SATURDAY...NONE
NO FLASH FLOODING IS EXPECTED.
CAZ050-060230-
SAN DIEGO COUNTY VALLEYS-
INCLUDING THE CITIES OF ESCONDIDO, EL CAJON, SAN MARCOS, LA MESA,
SANTEE, AND POWAY
256 AM PDT FRI SEP 5 2025
TODAY...LOW
THE RISK OF FLASH FLOODING IS MINIMAL.
SATURDAY...NONE
NO FLASH FLOODING IS EXPECTED.
CAZ043-057-552-554-060230-
SAN DIEGO COUNTY COASTAL AREAS-SANTA ANA MOUNTAINS AND FOOTHILLS-
ORANGE COUNTY COASTAL AREAS-ORANGE COUNTY INLAND AREAS-
INCLUDING THE CITIES OF OCEANSIDE, VISTA, CARLSBAD, ENCINITAS,
CHULA VISTA, NATIONAL CITY, SAN DIEGO, HUNTINGTON BEACH,
COSTA MESA, NEWPORT BEACH, LAGUNA BEACH, SAN CLEMENTE, SANTA ANA,
ANAHEIM, GARDEN GROVE, IRVINE, ORANGE, FULLERTON,
AND MISSION VIEJO
256 AM PDT FRI SEP 5 2025
TODAY...NONE
NO FLASH FLOODING IS EXPECTED.
SATURDAY...NONE
NO FLASH FLOODING IS EXPECTED.
17
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