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
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 mostly cloudy. Not as warm. Highs 79 to 89. Southwest winds 10 to 15 mph with gusts to around 30 mph.

Tonight: Mostly cloudy in the evening then clearing. Lows 52 to 58. South winds 10 to 15 mph with gusts to around 25 mph.

Friday: Mostly cloudy in the morning then becoming partly cloudy. Highs 82 to 90. South winds 10 to 15 mph.

Friday Night: Partly cloudy. Lows 53 to 59. Southwest winds 10 to 15 mph with gusts to around 25 mph.

Saturday: Partly cloudy in the morning then becoming mostly sunny. Highs 74 to 82. Southwest winds 10 to 15 mph. Gusts up to 30 mph in the afternoon.

Saturday Night: Mostly clear. Lows around 52.

Sunday: Sunny. Highs 74 to 81.

Sunday Night through Monday Night: Clear. Lows 49 to 59. Highs 74 to 84.

Tuesday and Tuesday Night: Clear. Highs 84 to 92. Lows 51 to 60.

Wednesday: Sunny. Highs 89 to 97.
Impacts - E19 Information
39.0 FeetThe Cosumnes River overflow channel begins to flow.
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.