National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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COSUMNES RIVER - MICHIGAN BAR (MHBC1)
Latitude: 38.50º NLongitude: 121.04º WElevation: 168 Feet
Location: Sacramento County in CaliforniaBulletin Group: San JoaquinRiver Group: North San Joaquin
Action/Monitor: 7.0 FeetMinor Flood: 12.0 FeetModerate Flood: 16.0 FeetMajor Flood: 18.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View US Geological Survey (USGS) Data for this station location.

Historical Mean Daily Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2025 8,240 8.61 Feb 14, 2025
2024 10,100 9.16 Mar 2, 2024
2023 67,900 16.83 Dec 31, 2022
2022 14,000 10.11 Oct 25, 2021
2021 3,140 6.56 Jan 28, 2021
 Historical High Stage/Flow Events (Period of Record - Oct 1907 to Present) - Ranked by Flow
1997 93,000 18.54 Jan 02, 1997
1907 71,000* 16.30 Mar 19, 1907
2023 67,900 16.83 Dec 31, 2022
2017 49,700 15.19 Feb 10, 2017
1986 45,100 14.76 Feb 17, 1986
1956 42,000 14.59 Dec 23, 1955
 * Estimated
Location Photographs
ESRI™ Locator Map
Flood Impacts
13.2 FeetWater floods houses in Wilton. The south bank levee near Wilton is overtopped.
12.0 FeetWater flows on to the road near Wilton.
8.0 FeetLow lying lands along the river begin to flood.
Official 7 Day National Weather Service Forecast   (CAZ017)
Tonight: Mostly cloudy with a slight chance of rain showers in the evening, then partly cloudy after midnight. Patchy dense fog late in the evening. Areas of dense fog and locally dense after midnight. Lows around 45. Southeast winds up to 10 mph in the evening becoming light.

Tuesday: Mostly sunny. Highs 55 to 63. Light winds.

Tuesday Night: Mostly clear. Lows around 46. Light winds.

Wednesday: Mostly cloudy. Highs 55 to 60. Light winds.

Wednesday Night: Mostly cloudy. A slight chance of rain showers in the evening, then a chance of rain showers after midnight. Lows around 48. Southeast winds up to 10 mph.

Thursday: Mostly cloudy with a chance of rain showers. Highs around 56.

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows around 44.

Friday: Mostly sunny. Highs around 60.

Friday Night: Clear. Lows 39 to 47.

Saturday through Sunday Night: Mostly clear. Highs around 60. Lows 39 to 47.

Monday: Partly cloudy. Highs around 60.
Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Sacramento Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.