Carneros Creek at Old Sonoma Road

Last updated: Jul 23, 2025, 6:30 AM UTC

Flood Impacts 🅘

  • 28 - Major Flood Stage. Water is 3 feet deep on floodplain. Major roadway flooding in the area, including Highway 12/121.
  • 25 - Moderate Flood Stage. Flood waters are on the floodplain. Old Sonoma Road flooded. Old Sonoma Highway and Highway 12/121 likely flooded or in jeopardy just downstream.
  • 19.5 - Minor Flood Stage. Backwatering begins at Old Sonoma Road bridge. Water level is reaching elevation of bridge, with possible overflow. NWS will issue a Flash Flood Warning if not yet already issued.

Gauge Info

Coordinates 38.2567, -122.340
RFC CNRFC
State CA
WFO MTR
County Napa
Data Provider(s)
Napa County

Gauge Location

Gauge Photos

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Probability Information

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Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

WFO Information

Weather Forecast Office
San Francisco Bay Area
21 Grace Hopper Ave, Stop 5
Monterey, CA 93943-5505
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