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 CaliforniaRiver Group: Upper Sacramento
Monitor Stage: 60.9 FeetFlood Stage: 70.1 FeetDanger Stage: 71.1 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
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
Official 7 Day National Weather Service Forecast   (CAZ016)
Today: A chance of rain showers in the morning, then rain showers in the afternoon. Windy. Highs 51 to 58. South winds 20 to 30 mph with gusts to around 45 mph.

Tonight: Rain showers and a slight chance of thunderstorms in the evening, then rain showers likely after midnight. Windy. Lows 38 to 44. South winds 25 to 35 mph with gusts to around 45 mph.

Saturday: Mostly cloudy. A chance of rain showers in the morning, then rain showers and a slight chance of thunderstorms in the afternoon. Breezy. Highs 48 to 53. South winds 15 to 25 mph with gusts to around 35 mph.

Saturday Night: Mostly cloudy. Rain showers likely and a slight chance of thunderstorms in the evening, then a chance of rain showers after midnight. Lows 35 to 40. South winds 10 to 20 mph with gusts to around 30 mph.

Sunday: Mostly cloudy with a chance of rain showers. Highs 50 to 55. South winds 10 to 15 mph with gusts to around 25 mph.

Sunday Night: Mostly cloudy with a slight chance of rain showers. Lows around 37.

Monday: Partly cloudy with a slight chance of rain showers. Highs 52 to 58.

Monday Night through Wednesday: Mostly cloudy with a chance of rain showers. Lows around 42. Highs 53 to 59.

Wednesday Night: Partly cloudy with a slight chance of rain showers. Lows around 40.

Thursday: Mostly sunny. Highs 56 to 61.
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.
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.