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: 61.8 FeetFlood Stage: 71.0 FeetDanger Stage: 72.0 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
2015
21,147
66.96
Dec 13, 2014
2014
0****
--
--
2013
13,400
66.10
Dec 3, 2012
2012
0****
--
--
2011
49,388
67.83
Mar 22, 2011
 Historical High Stage/Flow Events (Period of Record - January 1911 to Present)
1940
--
70.60*
Mar 1, 1940
1983
81,500
68.96**
Mar 4, 1983
1997
71,000
68.85
Jan 3, 1997
1958
83,600
68.80***
Feb 21, 1958
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
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ016)
Today: Patchy frost in the morning. Mostly sunny. Highs around 52. Northwest winds 10 to 15 mph.

Tonight: Clear. Areas of frost after midnight. Lows 22 to 30. Northwest winds 10 to 15 mph.

Tuesday: Areas of frost in the morning. Mostly sunny. Highs around 51. Northwest winds up to 10 mph.

Tuesday Night: Partly cloudy in the evening then becoming mostly cloudy. Areas of frost after midnight. Lows 27 to 35. Southeast winds up to 10 mph in the evening becoming light.

Wednesday: Partly cloudy in the morning then becoming mostly sunny. Areas of frost in the morning. Highs around 53. Northwest winds around 10 mph.

Wednesday Night: Partly cloudy. Lows 33 to 39.

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

Thursday Night: Partly cloudy with a slight chance of rain showers. Lows 30 to 38.

Friday: Partly cloudy with a slight chance of rain showers. Highs around 57.

Friday Night: Mostly clear. Lows 28 to 36.

Saturday through Sunday: Partly cloudy with a slight chance of rain showers. Highs around 57. Lows 28 to 38.
Impacts - E19 Information
61.8 FeetColusa Weir crest elevation. Overflow begins into the Sutter Bypass.
74.8 FeetStages above 74.8 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.