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
2015*
5,766
39.31
Feb 9, 2015
2014*
2,370
43.05
Feb 10, 2014
2013*
4,332
37.23
Dec 3, 2012
2012*
7,715
41.07
Feb 27, 2007
2011*
19,014
44.80
Mar 17, 2011
 Historical High Stage/Flow Events (Period of Record - Jan 1952 to Present)
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: Sunny. Highs 79 to 85. Northwest winds up to 10 mph.

Tonight: Clear. Lows 54 to 62. Northwest winds to around 10 mph. Gusts up to 20 mph after midnight.

Monday: Sunny. Highs 82 to 88. Northwest winds 10 to 20 mph.

Monday Night: Clear. Lows 56 to 64. Northwest winds 10 to 15 mph.

Tuesday: Sunny. Highs 83 to 89. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Tuesday Night: Clear. Lows 59 to 67.

Wednesday: Sunny. Highs 87 to 93.

Wednesday Night through Thursday Night: Clear. Lows 55 to 62. Highs 84 to 93.

Friday and Friday Night: Mostly clear. Highs 76 to 84. Lows 53 to 61.

Saturday: Mostly sunny. Highs 71 to 77.
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.