At 3:55 p.m. on Sunday, the National Weather Service released an updated flash flood warning in effect until 5:45 p.m. for Washington County.

A flash flood warning was in effect until 7 p.m. for Santa Clarita, Granada Hills, and Sylmar, where isolated thunderstorms brought heavy rain, gusty winds, and possible hail.

NWS meteorlogists have also issued a flash flood warning for parts of the Inland Empire, including Riverside, San Bernardino, Fontana, Moreno Valley and Ontario. The heavy rain has already dropped ...

A flash flood warning is issued when a flash flood is imminent or occurring. If you are in a flood-prone area, move immediately to high ground. A flash flood is a sudden violent flood that can take ...

The NWS Reno NV issued a flash flood warning at 6:13 p.m. on Friday in effect until 7:15 p.m. for Nevada and Sierra counties.

Booming thunderstorms, lightning strikes, bursts of heavy rain and even pea-sized hail hit parts of Southern California on Tuesday afternoon, prompting flash flood warnings around the region and ...