CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SACRAMENTO RIVER - COLUSA WEIR (CLAC1)

Latitude: 39.24º N	Longitude: 121.99º W	Elevation: 62 Feet
Location: Colusa County in California		Bulletin Group: Upper Sacramento		River Group: Upper Sacramento

Issuance Time:

Apr 23 2024 at 7:36 AM PDT

Next Issuance:

Apr 24 2024 at 9:00 AM PDT

Monitor Stage: 60.9 Feet

Flood Stage: 70.1 Feet

Danger Stage: 71.1 Feet

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.

Colusa Weir Location - Sacramento River Channel Stage/Flow (Estimated)

Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above.

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	0****	--	--
2021	0****	--	--
2020	0****	--	--
2019	44,300	68.74	Feb 16, 2019
2018	5,430	64.80	Apr 8, 2018
Historical High Stage/Flow Events (Period of Record - January 1911 to Present) - Ranked by Flow
1940	--	70.60*	Mar 1, 1940
1958	83,600	68.80***	Feb 21, 1958
1983	81,500	68.96**	Mar 4, 1983
1997	71,000	68.85	Jan 3, 1997
1965	77,400	68.50	Jan 7, 1965
1943	--	68.30	Jan 24, 1943
* Peak prior to regulation by Shasta Dam
** Peak after regulation by Shasta Dam
*** Peak also occurred on Feb 26th
**** No weir flow observed during the entire water year
***** Datum changed from USED to NAVD88 on 10/01/2019. The difference is -0.9 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
60.9 Feet	Colusa Weir crest elevation. Overflow begins into the Sutter Bypass.
73.9 Feet	Stages above 73.9 feet result in major flooding. Top of levee.

Official 7 Day National Weather Service Forecast (CAZ016)

Today: Mostly sunny. A slight chance of rain showers in the morning. Not as warm. Highs 70 to 76. Southeast winds 10 to 15 mph.

Tonight: Mostly clear. Lows around 50. Southeast winds up to 10 mph.

Wednesday: Mostly sunny. Highs 72 to 77. South winds up to 10 mph.

Wednesday Night: Mostly clear. Lows around 52. Southeast winds 10 to 15 mph.

Thursday: Partly cloudy. Highs 66 to 72. Southeast winds 10 to 15 mph.

Thursday Night: Mostly cloudy with a slight chance of rain showers. Lows around 51.

Friday: Partly cloudy with a slight chance of showers and thunderstorms. Highs 68 to 73.

Friday Night through Sunday Night: Mostly clear. Lows 48 to 54. Highs 68 to 78.

Monday: Sunny. Highs 73 to 78.

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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