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
Monitor Stage: 40.0 FeetFlood Stage: 46.0 Feet

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.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2016*
6,626
40.20
Mar 14, 2016
 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. Breezy. Highs 76 to 82. Northwest winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon.

Tonight: Mostly clear. Lows 46 to 56. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Wednesday: Mostly sunny. Highs 80 to 86. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Wednesday Night: Mostly clear. Lows 49 to 59. North winds up to 10 mph with gusts to around 20 mph.

Thursday: Sunny. Highs 85 to 91. Northeast winds up to 10 mph shifting to the northwest around 10 mph in the afternoon. Gusts up to 20 mph.

Thursday Night: Mostly clear. Lows 51 to 61.

Friday: Mostly sunny. Highs 87 to 93.

Friday Night: Mostly clear. Lows 53 to 63.

Saturday: Sunny. Highs 86 to 92.

Saturday Night: Mostly clear. Lows 52 to 61.

Sunday: Sunny. Highs around 88.

Sunday Night and Monday: Mostly clear. Lows 52 to 62. Highs 83 to 89.
Impacts - E19 Information
39.0 FeetThe Cosumnes River overflow channel begins to flow.
40.0 FeetWater exits 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.