Colgan Creek near Sebastopol, CA
River level and flood forecast · Sonoma County
Normal67.6 ftas of Mon 7:15 PM
The river is 7.4 ft below flood stage (75 ft).
Flow: 0 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 4 PM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Colgan Creek near Sebastopol to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 79 ft |
| Moderate flood stage | 76.5 ft |
| Flood stage | 75 ft |
| Action stage | 73.5 ft |
What floods at each level
From the National Weather Service, highest first.
- 79 ftMajor Flooding. Major floodplain inundation and water levels at approximately 1 foot above elevation of bridge deck on Llano Road.
- 76.5 ftModerate Flooding. Additional floodplain and roadway inundation on Llano Road. NWS will issue a Flash Flood Warning, if not yet already issued.
- 75 ftMinor Flooding. Floodplain upstream of the Llano Road bridge on right bank (north) side begins to flood into adjacent farmland. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
- 73.5 ftAction Stage. Roadside ditch upstream of Llano Road bridge on the left bank (south) side begins to flood. NWS may issue a Flash Flood Watch, if not yet already issued.
Up and down the river, and nearby
- Laguna de Santa Rosa at Stony Point Road NR Cotati, CA
- Colgan Creek near Santa Rosa, CA
- Copeland Creek at Rohnert Park, CA
- Laguna de Santa Rosa near Sebastopol, CA
- Santa Rosa Creek at Santa Rosa, CA
- Santa Rosa Creek at Willowside Road NR Santa Rosa, CA
- Matanzas Creek at Santa Rosa, CA
- Mark West Creek near Mirabel Heights, CA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (CGNC1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.