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 CaliforniaBulletin Group: Upper SacramentoRiver Group: Upper Sacramento
Issuance Time: May 31 2023 at 7:58 AM PDTNext Issuance: Jun 01 2023 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
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
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.
Official 7 Day National Weather Service Forecast   (CAZ016)
Today: Sunny. Highs 83 to 88. Southeast winds up to 10 mph.

Tonight: Clear. Lows 56 to 62. South winds around 10 mph shifting to the east after midnight.

Friday: Sunny. Highs 87 to 92. Northwest winds up to 10 mph.

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

Saturday: Sunny. Highs 90 to 96. North winds up to 10 mph shifting to the southwest around 10 mph in the afternoon.

Saturday Night: Clear. Lows around 65.

Sunday: Mostly sunny. Highs 93 to 99.

Sunday Night: Mostly cloudy. Lows around 67.

Monday: Partly cloudy. Highs 87 to 95.

Monday Night: Mostly cloudy with a slight chance of rain showers. Lows 58 to 64.

Tuesday: Partly cloudy with a slight chance of rain showers. Highs 82 to 87.

Tuesday Night: Mostly cloudy with a slight chance of rain showers. Lows around 60.

Wednesday: Partly cloudy with a slight chance of rain showers. Highs 81 to 86.
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.