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: Mostly cloudy with a slight chance of rain showers in the morning, then mostly sunny in the afternoon. Breezy. Highs around 67. Northwest winds 10 to 15 mph shifting to the north 15 to 25 mph in the afternoon.

Tonight: Clear. Lows around 45. North winds 10 to 20 mph with gusts to around 30 mph.

Friday: Sunny, breezy. Highs around 73. Northwest winds 15 to 25 mph.

Friday Night: Clear, windy. Lows around 50. North winds 15 to 30 mph.

Saturday: Mostly sunny. Breezy. Highs around 78. North winds 10 to 25 mph.

Saturday Night: Mostly clear. Lows around 52.

Sunday: Partly cloudy. Highs around 77.

Sunday Night: Mostly cloudy with a slight chance of rain showers. Lows 44 to 50.

Monday and Monday Night: Mostly clear. Highs around 73. Lows 44 to 50.

Tuesday and Tuesday Night: Partly cloudy. Highs around 74. Lows around 47.

Wednesday: Mostly cloudy with a slight chance of rain showers. Highs around 71.
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.