Flood Watch

Locations Affected

Pomona, CA ∙ Lancaster, CA ∙ Palmdale, CA ∙ Pasadena, CA ∙ West Covina, CA ∙ El Monte, CA ∙ Alhambra, CA ∙ Whittier, CA ∙ Baldwin Park, CA ∙ Monterey Park, CA

Headline

.Small modification in timing description, otherwise no change.

Full Alert Message

URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch...CORRECTED National Weather Service Los Angeles/Oxnard CA 321 PM PDT Wed Sep 17 2025 .Small modification in timing description, otherwise no change. ...FLOOD WATCH IN EFFECT FROM EARLY THURSDAY MORNING THROUGH LATE THURSDAY NIGHT... * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of southwest California, including the following areas, Antelope Valley, Cuyama Valley, Eastern Antelope Valley Foothills, Eastern San Gabriel Mountains, Eastern Santa Monica Mountains Recreational Area, Interstate 5 Corridor, Los Angeles County San Gabriel Valley, Malibu Coast, Northern Ventura County Mountains, San Luis Obispo County Interior Valleys, San Luis Obispo County Mountains, Santa Barbara County Interior Mountains, Southern Ventura County Mountains, Western Antelope Valley Foothills, Western San Gabriel Mountains and Highway 14 Corridor and Western Santa Monica Mountains Recreational Area. * WHEN...From early Thursday morning through late Thursday night. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Rain rates up to or locally exceeding one half inch per hour are possible. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flash Flood Watch means that conditions may develop that lead to flash flooding. Flash flooding is a VERY DANGEROUS SITUATION.

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