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
2020
0****
--
--
2019
44,300
68.74
Feb 16, 2019
2018
5,430
64.80
Apr 8, 2018
2017
43,300
68.68
Feb 19, 2017
2016
23,033
67.14
Mar 14, 2016
 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: Sunny, breezy. Highs around 77. Northwest winds 10 to 15 mph increasing to 15 to 25 mph in the afternoon.

Tonight: Mostly clear. Lows 49 to 57. Northwest winds 10 to 20 mph.

Wednesday: Mostly sunny. Highs around 83. Northwest winds 10 to 15 mph with gusts to around 25 mph.

Wednesday Night: Mostly clear. Lows 50 to 60. North winds around 10 mph with gusts to around 20 mph.

Thursday: Sunny. Highs around 88. North winds around 10 mph with gusts to around 20 mph.

Thursday Night: Mostly clear. Lows 51 to 61.

Friday: Mostly sunny. Highs around 88.

Friday Night: Mostly clear. Lows 52 to 62.

Saturday: Sunny. Highs around 88.

Saturday Night: Mostly clear. Lows 51 to 61.

Sunday: Sunny. Highs around 88.

Sunday Night and Monday: Mostly clear. Lows 52 to 61. Highs around 88.
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.