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 - MCCONNELL (MCNC1)
Latitude: 38.36º NLongitude: 121.34º WElevation: 5 Feet
Location: Sacramento County in CaliforniaRiver Group: San Joaquin
Issuance Time: Mar 31 2023 at 2:02 PM PDTNext Issuance: Apr 01 2023 at 9:00 AM PDT
Monitor Stage: 36.0 FeetFlood Stage: 42.0 Feet
Please Note:On March 9, 2023, monitor stage was updated to 36.0 ft and flood stage was updated to 42.0 ft.
Observed Data Credit
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Raw streamflow data is provided by the California Department of Water Resources.
View CA DWR 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
2021*
3,000
32.00
Jan 29, 2021
2020*
6,890
38.18
Apr 6, 2020
2019*
13,200
42.04
Feb 15, 2019
2018*
24,200
42.92
Mar 23, 2018
2017*
33,900
43.99
Jan 11, 2017
 Historical High Stage/Flow Events (Period of Record - Jan 1952 to Present) - Ranked by Flow
1997*
--
48.50
Jan 02, 1997
1986
--
47.10
Feb 18, 1986
2006*
36,209
47.02
Jan 01, 2006
1998*
--
46.56
Feb 04, 1998
 * Discharge affected by regulation or diversion
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ017)
Today: Mostly sunny in the morning then becoming partly cloudy. Highs 58 to 65. South winds up to 15 mph.

Tonight: Mostly cloudy. Lows 39 to 46. Southwest winds 10 to 15 mph.

Sunday: Partly cloudy. Highs 58 to 63. Southwest winds 10 to 15 mph.

Sunday Night: Partly cloudy. A slight chance of rain showers in the evening. Lows around 37. West winds 10 to 20 mph with gusts to around 30 mph.

Monday: Areas of frost in the morning. Mostly sunny. Breezy. Highs 55 to 60. Northwest winds 10 to 25 mph. Gusts up to 20 mph in the morning.

Monday Night: Clear. Lows around 35.

Tuesday: Mostly sunny. Areas of frost. Highs 55 to 60.

Tuesday Night through Thursday Night: Mostly clear. Lows 38 to 43. Highs 56 to 66.

Friday: Mostly sunny. Highs 64 to 70.
Impacts - E19 Information
35.0 FeetThe Cosumnes River overflow channel begins to flow.
36.0 FeetMonitor Stage - 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.
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.