CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

COSUMNES RIVER - MCCONNELL (MCNC1)

Latitude: 38.36º N	Longitude: 121.34º W	Elevation: 5 Feet
Location: Sacramento County in California		Bulletin Group: San Joaquin		River Group: North San Joaquin

Issuance Time:

Dec 07 2023 at 1:35 PM PST

Next Issuance:

Dec 08 2023 at 9:00 AM PST

Monitor Stage: 38.5 Feet

Flood Stage: 44.5 Feet

Please Note:

On June 20, 2023, the datum was changed from USED to NAVD88 (+2.46 feet). As a result the monitor stage was updated to 38.5 ft and flood stage was updated to 44.5 ft.

Plot Type:

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

Observed Data Credit
	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
2022*	7,790	38.99	Dec 24, 2021
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
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
** Dataum changed from USED to NAVD88 on 06/20/2023. The difference is +2.46 ft and must be applied to all data before date to convert to NAVD88.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Impacts - E19 Information
41.5 Feet	The Cosumnes River overflow channel begins to flow.
46.5 Feet	At approximately 44,000 cfs, 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.

Official 7 Day National Weather Service Forecast (CAZ017)

Today: Partly cloudy in the morning then clearing. Patchy fog early in the morning. Highs 53 to 59. Northwest winds 10 to 20 mph with gusts to around 30 mph.

Tonight: Clear. Areas of frost after midnight. Lows 30 to 40. North winds up to 15 mph and except north up to 20 mph with gusts to around 35 mph west of the sacrAMento river. Gusts up to 25 mph in the evening.

Saturday: Areas of frost in the morning. Mostly sunny. Highs around 56. Northeast winds up to 10 mph. Gusts up to 25 mph in the morning.

Saturday Night: Mostly clear in the evening then becoming mostly cloudy. Areas of frost after midnight. Lows 32 to 41. Light winds.

Sunday: Areas of frost in the morning. Mostly cloudy. Highs around 58. Light winds.

Sunday Night: Partly cloudy. Lows 33 to 42.

Monday: Mostly sunny. Patchy frost. Highs around 61.

Monday Night through Tuesday Night: Clear. Lows 34 to 44. Highs 59 to 65.

Wednesday through Thursday: Mostly clear. Highs around 60. Lows 34 to 44.

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.

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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.