Cosumnes River at McConnell
California — Water Level & Flood Stage
Located in Sacramento County, California on the Cosumnes River. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: MCNC1). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
53.5 ft
Moderate Flood
53.4 ft
Minor Flood
44.5 ft
Action Stage
38.5 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
46.5 ft
At approximately 44,000 cfs, water exits the river upstream and downstream of Highway 99. Dillard Road is flooded from Highway 99 to Riley Road. Twin Cities Road is flooded from Hardesty Lane to Christensen Road.
44.5 ft
Flood stage.
41.5 ft
The Cosumnes River overflow channel begins to flow.
38.5 ft
Monitor Stage.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Jan 13, 1980 | 49.9 ft | 30,000 cfs |
| Jan 13, 1980 | 49.9 ft | 30,000 cfs |
| Jan 1, 1997 | 48.5 ft | — |
| Jan 1, 1997 | 48.5 ft | — |
| Feb 17, 1986 | 47.1 ft | — |
About This Gauge
NWS LID
MCNC1
River
Cosumnes River
County
Sacramento, CA
Coordinates
38.3575°N, 121.3436°W
Get Flood Alerts for Cosumnes River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Cosumnes River at McConnell?
The Cosumnes River at McConnell gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Cosumnes River at McConnell?
The NWS-defined flood stage for Cosumnes River at McConnell is 44.5 feet. Action stage begins at 38.5 feet. Moderate flooding starts at 53.4 feet, and major flooding at 53.5 feet.
How do I get alerts when Cosumnes River rises?
Download StormCast free on Google Play, go to River Gauges, and add Cosumnes River at McConnell to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Cosumnes River at McConnell gauge located?
The gauge is located in Sacramento County, California at coordinates 38.3575°N, 121.3436°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Observations Courtesy of CA Department of Water Resources
- <a href='https://www.weather.gov/buf/avonmove250108'>The Genesee River at Avon River Forecast Point will be relocated 0.3 miles downstream to the old Erie Railroad Bridge on February 10, 2025. Click this link for more information.</a>