Colgan Creek near Santa Rosa, CA

River level and flood forecast · Sonoma County

Normal97.7 ftas of Mon 7:15 PM

The river is 8.3 ft below flood stage (106 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 Santa Rosa to flood, when it floods, and when it's over.

Flood stages

Major flood stage	109 ft
Moderate flood stage	108 ft
Flood stage	106 ft
Action stage	104 ft

What floods at each level

From the National Weather Service, highest first.

109 ftMajor floodplain inundation in vicinity of Elsie Allen High School and possibly elsewhere along Colgan Creek near Santa Rosa. Bellevue Avenue also heavily inundated by flood waters and possibly impassable by vehicle and foot traffic. Roadway and sidewalk manhole covers may be backpressured and missing.
108 ftAdjacent maintenance road on north (right bank) side of channel flooded. Culvert that serves Colgan Creek beneath Burgess Drive fully submerged and likely backwatered. Channel banks overtopped and Elsie Allen ballfield begins to flood. NWS will issue a Flash Flood Warning, if not yet already issued.
106 ftAdjacent maintenance road on north (right bank) side of channel flooded downstream of Burgess Drive bridge. Creek water levels have reached the elevation of storm drains serving runoff on Bellevue Avenue, so evacuation of runoff from the roadway and sidewalk may be limited or halted. Resultant roadway runoff may build up, causing localized urban roadway flooding. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
104 ftAction Stage. Many adjacent storm drain outlets within the creek channel that serve surrounding floodplain and roadways in the vicinity of Elsie Allen High School are submerged and may begin to backwater. NWS may 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 County NWS gauge page USGS gauge 11465690

Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (EASC1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.