CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

COSUMNES RIVER - MICHIGAN BAR (MHBC1)

Latitude: 38.50º N	Longitude: 121.04º W	Elevation: 168 Feet
Location: Sacramento County in California		Bulletin Group: San Joaquin		River Group: North San Joaquin

Issuance Time:

Jul 02 2025 at 8:28 AM PDT

Next Issuance:

Jul 03 2025 at 9:00 AM PDT

Action/Monitor: 7.0 Feet

Minor Flood: 12.0 Feet

Moderate Flood: 16.0 Feet

Major Flood: 18.0 Feet

Plot Type:

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

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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
13.2 Feet	Water floods houses in Wilton. The south bank levee near Wilton is overtopped.
12.0 Feet	Water flows on to the road near Wilton.
8.0 Feet	Low lying lands along the river begin to flood.

Official 7 Day National Weather Service Forecast (CAZ017)

Today: Sunny. Highs 92 to 100. Southwest winds up to 10 mph with gusts to around 20 mph.

Tonight: Clear. Lows 57 to 67. South winds up to 15 mph.

Thursday: Mostly sunny in the morning then becoming partly cloudy. Highs 86 to 94. South winds up to 15 mph. Gusts up to 25 mph in the afternoon.

Thursday Night: Mostly clear. Lows 54 to 62. Southwest winds 10 to 15 mph with gusts to around 25 mph.

Independence Day: Sunny. Highs 81 to 89. South winds up to 10 mph with gusts to around 20 mph.

Friday Night: Clear. Lows 50 to 59.

Saturday: Sunny. Highs 87 to 93.

Saturday Night through Tuesday: Clear. Lows 54 to 64. Highs 88 to 98.

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.

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