176
FGUS76 KSGX 152333
ESFSGX

Hydrologic Forecast for Extreme Southwestern California
National Weather Service San Diego CA
433 PM PDT Tue Jul 15 2025

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

.SYNOPSIS...
Dry weather will continue through Wednesday. A weak upper level
low pressure system from the south will bring an increase in
monsoonal moisture on Thursday and Friday with a chance for
afternoon showers and thunderstorms, mainly for the mountains and
high desert. Chances will slowly decrease for next weekend as the
monsoonal moisture begins to decrease.

$$

CAZ043-048-050-057-060>062-065-552-554-161145-
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-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,
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
433 PM PDT Tue Jul 15 2025

.TONIGHT...None...no flash flooding is expected.
.WEDNESDAY...None...no flash flooding is expected.
.THURSDAY...None...no flash flooding is expected.

$$

CAZ055-056-058-161145-
San Bernardino County Mountains-Riverside County Mountains-
San Diego County Mountains-
Including the cities of Crestline, Lake Arrowhead, Big Bear City,
Big Bear Lake, Running Springs, Wrightwood, Idyllwild-Pine Cove,
Julian, and Pine Valley
433 PM PDT Tue Jul 15 2025

.TONIGHT...None...no flash flooding is expected.
.WEDNESDAY...None...no flash flooding is expected.
.THURSDAY...Low...the risk of flash flooding is minimal.

$$