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 20 2023 at 2:58 PM PDTNext Issuance: Mar 21 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)
Tonight: Mostly cloudy until early morning, then a chance of rain showers late in the night. Lows around 43. Southwest winds up to 10 mph shifting to the northeast after midnight.

Tuesday: Rain showers in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Some thunderstorms may produce small hail in the afternoon. Highs 48 to 56. East winds 10 to 20 mph. Gusts up to 25 mph increasing to 40 mph in the afternoon.

Tuesday Night: Mostly cloudy. Rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain showers after midnight. Breezy. Some thunderstorms may produce small hail in the evening. Lows around 44. Southeast winds 10 to 25 mph. Gusts up to 40 mph decreasing to 30 mph after midnight.

Wednesday: Mostly cloudy with a chance of rain showers. Highs 54 to 60. Southeast winds around 10 mph with gusts to around 20 mph.

Wednesday Night: Mostly cloudy. A slight chance of rain showers in the evening. Lows around 43. South winds up to 10 mph.

Thursday: Mostly cloudy. Highs 57 to 62.

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows around 39.

Friday: Partly cloudy. Highs 55 to 61.

Friday Night and Saturday: Mostly clear. Lows around 37. Highs 55 to 61.

Saturday Night: Mostly clear. Areas of frost. Lows around 35.

Sunday: Partly cloudy with a slight chance of rain showers. Areas of frost. Highs 55 to 60.

Sunday Night: Mostly cloudy with a chance of rain showers. Lows around 40.

Monday: Mostly cloudy with rain showers likely. Highs 51 to 58.
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.