CNRFC - Hydrology - Observed River/Reservoir Conditions

*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

SACRAMENTO RIVER - MOULTON WEIR (CLSC1)

Latitude: 39.34º N	Longitude: 122.02º W	Elevation: 76 Feet
Location: Colusa County in California		River Group: Upper Sacramento

Monitor Stage: 76.2 Feet

Flood Stage: 83.8 Feet

Danger Stage: 84.8 Feet

Observed Data Credit
	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
2024*	3,940	78.05	Feb 21, 2024
2023*	4,380	78.18	Mar 16, 2023
2022*	0****	--	--
2021*	0****	--	--
2020*	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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ016)

Tonight: Clear, cooler. Lows 55 to 65. Southeast winds around 10 mph shifting to the northeast up to 10 mph with gusts to around 25 mph after midnight.

Monday: Sunny. Highs 93 to 99. Northwest winds 10 to 15 mph with gusts to around 35 mph.

Monday Night: Clear. Lows 57 to 63. Southeast winds up to 10 mph with gusts to around 20 mph.

Tuesday: Sunny. Highs 91 to 97. Light winds becoming south around 10 mph in the afternoon.

Tuesday Night: Clear. Lows 59 to 65. Southeast winds up to 10 mph with gusts to around 20 mph.

Wednesday: Sunny. Highs around 95.

Wednesday Night: Clear. Lows 59 to 65.

Thursday through Sunday: Clear. Highs 93 to 103. Lows 59 to 67.

Flood Impacts
88.6 Feet	Stages above 89.2 feet result in major flooding of areas outside the levees. Top of levee.
76.2 Feet	Moulton Weir crest elevation. Overflow begins into butte sink. River Road is flooded and closed.

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.

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