National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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SACRAMENTO RIVER - COLUSA WEIR (CLAC1)
Latitude: 39.24º NLongitude: 121.99º WElevation: 62 Feet
Location: Colusa County in CaliforniaBulletin Group: Upper SacramentoRiver Group: Upper Sacramento
Issuance Time: Mar 04 2024 at 1:34 PM PSTNext Issuance: Mar 05 2024 at 9:00 AM PST
Monitor Stage: 60.9 FeetFlood Stage: 70.1 FeetDanger Stage: 71.1 Feet

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
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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
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
ESRI™ Locator Map
Impacts - E19 Information
60.9 FeetColusa Weir crest elevation. Overflow begins into the Sutter Bypass.
73.9 FeetStages above 73.9 feet result in major flooding. Top of levee.
Official 7 Day National Weather Service Forecast   (CAZ016)
Tonight: Mostly cloudy. A slight chance of rain showers in the evening, then a chance of rain showers after midnight. Lows 44 to 49. Southeast winds 10 to 15 mph with gusts to around 25 mph.

Tuesday: Mostly cloudy with a chance of rain showers. Highs 55 to 61. Southeast winds 10 to 20 mph.

Tuesday Night: Mostly cloudy with a chance of rain showers. Lows around 46. Southeast winds up to 15 mph. Gusts up to 25 mph in the evening.

Wednesday: Mostly cloudy with a slight chance of rain showers. Highs around 62. East winds up to 10 mph in the morning becoming light.

Wednesday Night: Mostly cloudy. Lows around 44. Northwest winds up to 10 mph.

Thursday: Partly cloudy. Highs around 63.

Thursday Night: Clear. Lows 37 to 43.

Friday: Sunny. Highs around 65.

Friday Night: Mostly clear. Lows 40 to 46.

Saturday: Mostly cloudy with a chance of rain showers. Highs around 60.

Saturday Night and Sunday: Mostly cloudy with a slight chance of rain showers. Lows around 43. Highs 57 to 63.

Sunday Night and Monday: Mostly cloudy with a chance of rain showers. Lows around 46. Highs 57 to 63.
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.