St. Helena is located in Napa County, California. This page shows active weather alerts affecting St. Helena issued by the National Weather Service.
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Saint Helena, California faces weather hazards shaped by its location in one of the world's most climatically diverse states. Depending on its region, threats may include wildfire, atmospheric river flooding, extreme heat, or coastal storms — all of which are monitored by the National Weather Service.
Common alert types for this area:
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