What areas in California are under flood alerts?

Flood watches and advisories are active across numerous California counties, including the San Joaquin Valley, coastal ranges, and mountainous regions.

When will the storm in California end?

The storm system is expected to move out of the region by Friday evening, with drier weather anticipated for the weekend.

What are the impacts of the atmospheric river in California?

The atmospheric river has brought heavy rainfall, leading to flood watches, advisories, flash flood warnings, and heavy snow in the Sierra Nevada mountains.

Home / Environment / California Drenched: Flood Alerts Grip State After Holiday Storm

California Drenched: Flood Alerts Grip State After Holiday Storm

26 Dec, 2025

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Summary

Flood watches and advisories are active across California due to an atmospheric river.
The National Weather Service warns of potential flash flooding and heavy snow.
Clearer skies are anticipated for the weekend after Friday's final storm system.

California Drenched: Flood Alerts Grip State After Holiday Storm

California is under a flood of alerts from the National Weather Service on Friday, as an atmospheric river event continues to impact the state after the Christmas period. Flood watches and advisories have been issued across many counties, including the San Joaquin Valley, coastal ranges, and mountainous areas. These alerts signal conditions favorable for flooding, potentially causing significant inconvenience and risks.

Areas such as northwestern Santa Clara County and Southern Santa Barbara County are under advisories, while flash flood warnings are in effect for parts of Ventura County. The National Weather Service also forecasts significant snowfall for the higher elevations of the Sierra Nevada before it tapers off by Friday evening.