306
FGUS76 KSGX 302231
ESFSGX

Hydrologic Forecast for Extreme Southwestern California
National Weather Service San Diego CA
331 PM PDT Sat Aug 30 2025

...Flash Flood Potential Index for Extreme Southwestern California...

.SYNOPSIS...
Dry conditions are expected through Sunday. Some monsoonal
moisture returns on Monday for a slight risk of afternoon showers
and possibly thunderstorms in the mountains and lower deserts.

$$

CAZ043-048-050-057-060-065-552-554-311415-
San Diego County Coastal Areas-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Diego County Valleys-Santa Ana Mountains and Foothills-
Apple and Lucerne Valleys-San Gorgonio Pass near Banning-
Orange County Coastal Areas-Orange County Inland Areas-
Including the cities of Oceanside, Vista, Carlsbad, Encinitas,
Chula Vista, National City, San Diego, Riverside, San Bernardino,
Ontario, Moreno Valley, Fontana, Rancho Cucamonga, Corona,
Escondido, El Cajon, San Marcos, La Mesa, Santee, Poway,
Victorville, Hesperia, Apple Valley, Lucerne Valley,
Huntington Beach, Costa Mesa, Newport Beach, Laguna Beach,
San Clemente, Santa Ana, Anaheim, Garden Grove, Irvine, Orange,
Fullerton, and Mission Viejo
331 PM PDT Sat Aug 30 2025

.TONIGHT...None...no flash flooding is expected.
.SUNDAY...None...no flash flooding is expected.
.LABOR DAY...None...no flash flooding is expected.

$$

CAZ055-056-058-061-062-311415-
San Bernardino County Mountains-Riverside County Mountains-
San Diego County Mountains-Coachella Valley-
San Diego County Deserts-
Including the cities of Crestline, Lake Arrowhead, Big Bear City,
Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove,
Julian, Pine Valley, Indio, Palm Springs, Cathedral City,
Palm Desert, Palm Desert Country, La Quinta, Coachella,
and Borrego Springs
331 PM PDT Sat Aug 30 2025

.TONIGHT...None...no flash flooding is expected.
.SUNDAY...None...no flash flooding is expected.
.LABOR DAY...Low...the risk of flash flooding is minimal.

$$