CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

AMERICAN RIVER - SACRAMENTO AT H STREET (SAMC1)

Latitude: 38.57º N	Longitude: 121.42º W	Elevation: 45 Feet
Location: Sacramento County in California		Bulletin Group: Lower Sacramento		River Group: Lower Sacramento

Issuance Time:

Dec 28 2025 at 8:15 AM PST

Next Issuance:

Dec 29 2025 at 9:00 AM PST

Action/Monitor: 39.0 Feet

Minor Flood: 42.0 Feet

Moderate Flood: 45.7 Feet

Major Flood: 46.7 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.

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
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	--	25.61	Jul 20, 2020
2024*	--	24.20	Feb 23, 2024
2023*	--	31.13	Mar 15, 2023
2022*	--	17.92	Jan 8, 2022
2021*	--	17.08	Mar 13, 2021
Historical High Stage/Flow Events (Period of Record - Jul 1921 to Present) - Ranked by Stage
1951	106,000	45.70**	Nov 21, 1950
1986*	115,000	43.40***	Feb 19, 1986****
1928	--	43.40	Mar 26, 1928
1997*	130,000	42.70	Jan 03, 1997*****
1963*	--	41.30	Feb 02, 1963
1940	--	39.70	Mar 31, 1940
* Discharge affected by regulation or diversion Stage of record prior to Folsom Dam construction * Stage of record after Folsom Dam construction ** Maximum Folsom Dam release of 130,000 cfs * Maximum Folsom Dam release of 115,000 cfs **** Datum changed from NGVD29 to NAVD88 on 10/01/2016. The difference is -0.84 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
46.7 Feet	Stages above 46.7 feet result in flooding outside the levees. Top of levee.

Official 7 Day National Weather Service Forecast (CAZ017)

Tonight: Partly cloudy. Patchy fog after midnight. Patchy frost late in the night. Lows 31 to 39. Light winds.

Monday: Mostly cloudy in the morning then becoming partly cloudy. Widespread fog and locally dense and areas of frost in the morning. Patchy dense fog in the afternoon. Highs 46 to 55. North winds up to 10 mph shifting to the east in the afternoon.

Monday Night: Partly cloudy. Patchy fog after midnight. Lows around 37. Light winds.

Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Patchy fog and frost in the morning. Highs around 51. Light winds.

Tuesday Night: Mostly cloudy. Patchy fog after midnight. Lows around 40. Light winds.

Wednesday: Mostly cloudy with a slight chance of rain. Patchy fog. Highs around 49.

Wednesday Night: Cloudy with rain likely. Lows around 44.

New Years Day: Rain likely. Highs around 51.

Thursday Night: Rain likely. Lows around 48.

Friday and Friday Night: Rain likely. Highs around 54. Lows around 48.

Saturday and Saturday Night: Rain likely. Highs around 52. Lows around 48.

Sunday: Mostly cloudy with a chance of rain. Highs around 52.

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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