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
Issuance Time: Aug 05 2020 at 7:14 AM PDTNext Issuance: Aug 06 2020 at 9:00 AM PDT
Monitor Stage: 60.9 FeetFlood Stage: 70.1 FeetDanger Stage: 71.1 Feet

Colusa Weir Location - Sacramento River Channel Stage/Flow (Estimated)
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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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2015
21,147
66.96
Dec 13, 2014
 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
 ***** 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)
Tonight: Clear. Lows 54 to 60. Southeast winds 10 to 20 mph.

Thursday: Partly cloudy in the morning then clearing. Highs 84 to 90. South winds around 10 mph.

Thursday Night: Clear. Lows 58 to 66. South winds 10 to 15 mph shifting to the east after midnight.

Friday: Sunny. Highs 89 to 95. North winds up to 10 mph shifting to the southwest around 10 mph in the afternoon.

Friday Night: Clear. Lows 61 to 69. South winds around 10 mph shifting to the east up to 10 mph after midnight.

Saturday: Sunny. Highs 93 to 99.

Saturday Night: Clear. Lows 63 to 71.

Sunday through Monday: Clear. Highs 95 to 102. Lows 62 to 72.

Monday Night: Mostly clear. Lows 60 to 70.

Tuesday through Wednesday: Clear. Highs 89 to 97. Lows 59 to 69.
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.