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 - MOULTON WEIR (CLSC1)
Latitude: 39.34º NLongitude: 122.02º WElevation: 76 Feet
Location: Colusa County in CaliforniaRiver Group: Upper Sacramento
Monitor Stage: 76.2 FeetFlood Stage: 83.8 FeetDanger Stage: 84.8 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
2022*
0****
--
--
2021*
0****
--
--
2020*
0****
--
--
2019*
8,410
79.75
Mar 1, 2019
2018*
0****
--
--
 Historical High Stage/Flow Events (Period of Record - Jan 1931 to Present)** - Ranked by Flow
1942
53,900
83.80
Feb 7, 1942
1958*
45,300
84.65***
Feb 20, 1958
1958*
44,200
84.62***
Feb 26, 1958
1983*
35,300
83.71
Mar 3, 1983
1956* 29,900 83.15 Jan 16, 1956
 * Discharge affected by regulation or diversion
 ** Peak flow before regulation by Shasta Dam began in 1943
 *** Old datum. The difference is -2.85 ft and must be applied to data to convert from NGVD29 to NAVD88
 **** No weir flow observed during the entire water year
 ***** Datum changed from USED to NAVD88 on 10/01/2019. The difference is -0.6 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: Mostly cloudy with a chance of rain showers and a slight chance of thunderstorms early in the evening, then mostly cloudy with a slight chance of rain showers late in the evening. Partly cloudy after midnight. Areas of frost late in the night. Lows 32 to 40. South winds up to 15 mph. Gusts up to 25 mph in the evening.

Monday: Mostly cloudy. Areas of frost in the morning. A chance of rain showers in the afternoon. Highs 50 to 56. Southeast winds up to 15 mph.

Monday Night: Mostly cloudy. A chance of rain showers in the evening, then rain showers likely after midnight. Lows around 46. Southeast winds 10 to 15 mph with gusts to around 25 mph.

Tuesday: Rain showers likely. Highs 54 to 60. Southeast winds 10 to 15 mph with gusts to around 25 mph.

Tuesday Night: Mostly cloudy with a chance of rain showers. Lows around 46. Southeast winds 10 to 15 mph shifting to the northeast after midnight.

Wednesday: Mostly cloudy with a slight chance of rain showers. Highs around 61.

Wednesday Night: Mostly clear. Lows around 41.

Thursday through Friday: Clear. Highs around 65. Lows around 41.

Friday Night: Mostly clear. Lows around 44.

Saturday: Mostly cloudy with a slight chance of rain showers. Highs 59 to 64.

Saturday Night: Partly cloudy with a slight chance of rain showers. Lows around 43.

Sunday: Mostly cloudy with a slight chance of rain showers. Highs around 60.
Impacts - E19 Information
76.2 FeetMoulton Weir crest elevation. Overflow begins into Butte Sink. River Road is flooded and closed.
88.6 FeetStages above 88.6 feet result in major flooding of areas outside the levees. 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.