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 CaliforniaBulletin Group: Upper SacramentoRiver Group: Upper Sacramento
Issuance Time: Feb 12 2025 at 1:03 PM PSTNext Issuance: Feb 13 2025 at 9:00 AM PST
Action/Monitor: 76.2 FeetMinor Flood: 83.8 FeetModerate Flood: 87.6 FeetMajor Flood: 88.6 Feet

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.
Moulton Weir Location - Sacramento River Channel Stage/Flow (Estimated)
Please Note: Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above.
Observed Data Credit
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Raw streamflow data is provided by the California Department of Water Resources.
View California Department of Water Resources Data for this station location.

Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.
Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2023*
4,380
78.18
Mar 16, 2023
2022*
0****
--
--
2021*
0****
--
--
2020*
0****
--
--
2019*
8,410
79.75
Mar 1, 2019
 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
Flood Impacts
88.6 FeetStages above 89.2 feet result in major flooding of areas outside the levees. Top of levee.
76.2 FeetMoulton Weir crest elevation. Overflow begins into butte sink. River Road is flooded and closed.
Official 7 Day National Weather Service Forecast   (CAZ016)
Tonight: A chance of rain showers late in the evening. Rain showers after midnight. Lows 38 to 46. Southeast winds up to 10 mph. Gusts up to 35 mph after midnight.

Thursday: Rain showers in the morning, then a chance of rain in the afternoon. Highs 55 to 60. South winds 10 to 20 mph with gusts to around 50 mph.

Thursday Night: Rain showers and a slight chance of thunderstorms in the evening, then rain likely after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows 43 to 50. South winds 10 to 20 mph with gusts to around 45 mph.

Friday: Mostly cloudy with a chance of rain in the morning, then partly cloudy with a slight chance of rain in the afternoon. Highs 56 to 62. South winds 10 to 15 mph. Gusts up to 35 mph decreasing to 20 mph in the afternoon.

Friday Night: Mostly clear. Lows around 39. East winds up to 10 mph in the evening becoming light.

Saturday: Mostly cloudy. Highs around 58.

Saturday Night: Mostly cloudy. Lows around 43.

Sunday: Mostly cloudy with a chance of rain. Highs around 57.

Sunday Night: Mostly cloudy with a slight chance of rain. Lows 40 to 46.

Washingtons Birthday: Mostly cloudy. Highs around 60.

Monday Night: Partly cloudy. Lows around 42.

Tuesday: Mostly sunny. Highs around 63.

Tuesday Night: Mostly cloudy. Lows around 44.

Wednesday: Mostly cloudy with a slight chance of rain. Highs around 63.
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.