CNRFC - Hydrology - River Guidance - Graphical RVF

End of River Group

Location:

SACRAMENTO RIVER - TISDALE WEIR (TISC1)

Latitude: 39.03º N	Longitude: 121.82º W	Elevation: 45 Feet
Location: Sutter County in California		Bulletin Group: Upper Sacramento		River Group: Upper Sacramento

Issuance Time:

May 20 2025 at 7:34 AM PDT

Next Issuance:

May 21 2025 at 9:00 AM PDT

Action/Monitor: 44.1 Feet

Minor Flood: 51.6 Feet

Moderate Flood: 54.6 Feet

Major Flood: 55.6 Feet

Plot Type:

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.

Tisdale 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
	Raw streamflow data is provided by the California Department of Water Resources. View California Department of Water Resources Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2024*	17,300	47.64	Feb 21, 2024
2023*	17,700	47.92	Jan 15, 2023
2022*	4,350	45.63	Oct 26, 2021
2021*	0****	--	--
2020*	0****	--	--
Historical High Stage/Flow Events (Period of Record - Jan 1932 to Present) - Ranked by Flow
1940	--	53.50**	Mar 01, 1940
1966*	24,600***	--	Dec 25, 1965
1997*	20,000	53.10	Jan 03, 1997
1942	19,500	52.90	Feb 08, 1942
1986*	19,300	52.66	Feb 20, 1986
* Discharge affected by regulation or diversion
** Peak of record prior to construction of Shasta Dam (Above Rating Table)
*** Peak of record after construction of Shasta Dam
**** No weir flow observed during the entire water year
***** Datum changed from USED to NAVD88 on 10/01/2019. The difference is -1.4 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

Flood Impacts
55.6 Feet	Stages above 55.6 feet results in flooding outside the levees. Top of levee.
44.1 Feet	Tisdale Weir crest elevation. Overflow begins into the Tisdale Bypass. This water eventually ends up in the Sutter Bypass.

Official 7 Day National Weather Service Forecast (CAZ016)

Tonight: Clear. Lows 55 to 61. North winds up to 10 mph.

Wednesday: Sunny. Highs 89 to 94. Northwest winds up to 10 mph.

Wednesday Night: Clear. Lows around 59. South winds up to 10 mph.

Thursday: Sunny. Highs around 86. Southeast winds up to 10 mph.

Thursday Night: Clear. Lows around 54. South winds up to 15 mph.

Friday: Sunny. Highs 79 to 84.

Friday Night: Clear. Lows around 55.

Saturday through Sunday: Clear. Highs 87 to 96. Lows around 57.

Sunday Night through Tuesday: Mostly clear. Lows around 59. Highs 87 to 96.

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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