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
Issuance Time: Jul 10 2025 at 7:49 AM PDTNext Issuance: Jul 11 2025 at 9:00 AM PDT
Action/Monitor: 7.0 FeetMinor Flood: 12.0 FeetModerate Flood: 16.0 FeetMajor Flood: 18.0 Feet

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
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.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2020
7,180
8.26
Apr 6, 2020
 Historical High Stage/Flow Events (Period of Record - Oct 1907 to Present) - Ranked by Flow
1997
93,000
18.54
Jan 02, 1997
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
1963
39,400
14.11
Feb 01, 1963
1965
37,500
13.80
Dec 23, 1964
1982
37,000
13.70
Feb 16, 1982
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: Clear, haze. Lows 61 to 71. Southwest winds up to 10 mph shifting to the south after midnight. Gusts up to 20 mph.

Friday: Sunny. Highs 99 to 105. Southwest winds up to 10 mph.

Friday Night: Clear. Lows 60 to 70. Southwest winds up to 10 mph with gusts to around 20 mph.

Saturday: Sunny. Highs 93 to 103. Southwest winds up to 10 mph.

Saturday Night: Clear. Lows 58 to 68. South winds up to 15 mph with gusts to around 25 mph.

Sunday: Sunny. Highs 94 to 102.

Sunday Night: Clear. Lows 57 to 67.

Monday and Monday Night: Clear. Highs 95 to 103. Lows 56 to 66.

Tuesday through Thursday: Clear. Highs 87 to 97. Lows 55 to 65.
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.