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Laguna de Santa Rosa at Stony Point Road NR Cotati, CA

River level and flood forecast · Sonoma County

Normal73.2 ftas of Mon 7:30 PM

The river is 10.8 ft below flood stage (84 ft).

Forecast to hold near 73.2 ft through Sat, Oct 17, 5 AM.

Flow: 0 cubic feet per second (USGS).

The last 7 days and the forecast

7075808590TueThuSatMonWedFriAction 82 ftFlood 84 ftModerate 85 ftMajor 89 ftNowObserved (ft)NWS forecast

NWS forecast issued Mon, Oct 12, 7:33 AM. Forecasts change as rain falls and as upstream water arrives.

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Flood stages

Major flood stage89 ft
Moderate flood stage85 ft
Flood stage84 ft
Action stage82 ft

What floods at each level

From the National Weather Service, highest first.

  • 89 ftMajor Flooding. Martin Avenue commercial district, as well as Labath Avenue and Commerce Blvd town center (Rohnert Park) susceptible to flooding (Copeland Creek immediately to the south is also probably flooding into the same area). Rancho Verde trailer park flooded. Backwater at Highway 101.
  • 85 ftModerate Flooding. Redwood Drive at Martin Avenue area in Rohnert Park, including Martin Avenue commercial area, may begin to flood. Rancho Verde trailer park likely beginning to flood. NWS will issue a Flash Flood Warning, if not yet already issued.
  • 84 ftMinor Flooding. Rohnert Park Expressway begins to flood west of Rohnert Park. City turns on storm drain pumps to relieve back pressure, sending water back to the channel. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
  • 82 ftAction Stage. City of Rohnert Park begins to monitor the gage and is alerted via USGS Water Watch notification. NWS will issue a Flash Flood Watch if not yet already issued.

Up and down the river, and nearby

See it on the live map →Radar & warnings for Sonoma CountyNWS gauge pageUSGS gauge 11465680

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CTIC1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.