048
FGUS76 KSGX 171007
ESFSGX

Hydrologic Forecast for Extreme Southwestern California
National Weather Service San Diego CA
307 AM PDT Sun Aug 17 2025

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

.SYNOPSIS...
Dry weather will continue through Wednesday. Monsoon moisture
returns for increasing thunderstorm chances with at least a low
potential of flash flooding beginning Thursday.

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CAZ043-048-050-055>058-060>062-065-552-554-180115-
San Diego County Coastal Areas-
San Bernardino and Riverside County Valleys-The Inland Empire-
San Diego County Valleys-San Bernardino County Mountains-
Riverside County Mountains-Santa Ana Mountains and Foothills-
San Diego County Mountains-Apple and Lucerne Valleys-
Coachella Valley-San Diego County Deserts-
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,
Crestline, Lake Arrowhead, Big Bear City, Big Bear Lake,
Running Springs, Wrightwood, Idyllwild-Pine Cove, Julian,
Pine Valley, Victorville, Hesperia, Apple Valley, Lucerne Valley,
Indio, Palm Springs, Cathedral City, Palm Desert,
Palm Desert Country, La Quinta, Coachella, Borrego Springs,
Huntington Beach, Costa Mesa, Newport Beach, Laguna Beach,
San Clemente, Santa Ana, Anaheim, Garden Grove, Irvine, Orange,
Fullerton, and Mission Viejo
307 AM PDT Sun Aug 17 2025

.TODAY...None...no flash flooding is expected.
.MONDAY...None...no flash flooding is expected.

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