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Flood in Napa County, California
Flood January 4, 2026 · Napa County, California
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
A mudslide was reported on the 5000 block of Monticello Road (California Route 121).
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 Salvador (38.4111, -122.2035).
Source: NOAA Storm Events Database, event 1300927. Narratives are written by the National Weather Service forecast office that issued the report.
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