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 CaliforniaRiver Group: San Joaquin
Monitor Stage: 7.0 FeetFlood Stage: 12.0 Feet

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

Historical Stage/Flow Data
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
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
Official 7 Day National Weather Service Forecast   (CAZ017)
Tonight: Mostly cloudy in the evening then becoming partly cloudy. Patchy fog after midnight. Lows 35 to 40. Light winds.

Monday: Partly cloudy in the morning then clearing. Areas of fog and patchy frost in the morning. Highs around 55. Light winds.

Monday Night: Mostly clear. Patchy fog after midnight. Lows 35 to 41. Light winds.

Tuesday: Partly cloudy in the morning then clearing. Patchy fog in the morning. Highs around 57. Light winds.

Tuesday Night: Mostly clear. Lows 37 to 43. Light winds.

Wednesday: Mostly sunny. Highs 54 to 60.

Wednesday Night: Mostly clear. Lows 39 to 45.

Thursday through Friday Night: Mostly clear. Highs 56 to 62. Lows 39 to 46.

Saturday through Sunday: Partly cloudy. Highs around 59. Lows 39 to 45.
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.
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.