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Flood in Napa County, California
Flood January 3, 2026 · Napa County, California
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Rocks were coming onto the roadway on California Route 128 at Berryessa Knoxville Road.
The wider storm
A series of storms impacted the Bay Area and Central Coast from January 1st to the 5th, causing numerous flooding impacts and scattered thunderstorms. A low pressure system on the 1st was followed by a strong cold front and associated atmospheric river late on the 2nd into the morning of the 3rd. A second cold front followed on the 4th. A tornado warning was issued on January 5 for the Pacific coast near the border between San Mateo and Santa Cruz counties due to a radar indicated rotation signature. Around 3,400 customers in San Francisco lost power on the 2nd.
Began near Oakville (38.4980, -122.2518).
Source: NOAA Storm Events Database, event 1300928. Narratives are written by the National Weather Service forecast office that issued the report.
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