CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

RUSSIAN RIVER - HEALDSBURG (HEAC1)

Latitude: 38.61º N	Longitude: 122.84º W	Elevation: 77 Feet
Location: Sonoma County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Dec 25 2025 at 1:11 PM PST

Next Issuance:

Dec 26 2025 at 9:00 AM PST

Action/Monitor: 20.0 Feet

Minor Flood: 23.0 Feet

Moderate Flood: 27.0 Feet

Major Flood: 29.0 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 US Geological Survey (USGS). View US Geological Survey (USGS) 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*	32,100	18.24	Nov 22, 2024
2024*	26,300	16.41	Feb 5, 2024
2023*	26,400	16.45	Jan 9, 2023
2022*	17,900	13.55	Oct 25, 2021
2021*	1,740	3.95	Feb 2, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1995*	73,000	26.23	Jan 9, 1995
1965*	71,300	27.00	Dec 23, 1964
1986*	71,100	25.81	Feb 17, 1986
2019*	67,300	26.84	Feb 27, 2019
1940	67,000	30.00	Feb 28, 1940
1997*	65,700	24.61	Jan 01, 1997
* Discharge affected by regulation or diversion

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
30.0 Feet	Major to disastrous flooding along the reach of the gage occurs. Major flooding occurs in the agricultural sections of Alexander Valley.
29.0 Feet	Major flooding along the reach of the gage will occur. Homes, businesses and secondary roads in the lower sections of Healdsburg will begin to flood. The lower areas of Alexander Valley will begin to flood.
27.0 Feet	Moderate flooding along the reach of the gage will occur. Some secondary roads south of US 101 will have minor to moderate flooding.
25.0 Feet	Low lying areas south of US 101 begin to have minor flooding.
23.0 Feet	Minor flooding of farm land and banks in rural areas along the reach of the gage will occur.

Official 7 Day National Weather Service Forecast (CAZ506)

rest of Tonight: Breezy. Showers likely late in the evening. A slight chance of thunderstorms. A chance of showers after midnight. Some thunderstorms may be severe with heavy rainfall. Lows in the 40s to lower 50s. Southwest winds 20 to 30 mph and Becoming south 10 to 20 mph after midnight. Gusts up to 45 mph.

Friday: Showers. A slight chance of thunderstorms in the afternoon. Some thunderstorms may produce heavy rainfall in the afternoon. Highs in the 40s to upper 50s. South winds 10 to 20 mph.

Friday Night: Mostly cloudy in the evening then becoming partly cloudy. A chance of showers and a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the 30s to upper 40s. Southwest winds 5 to 10 mph and Becoming northwest after midnight.

Saturday: Partly cloudy in the morning then becoming sunny. A slight chance of showers in the morning. Highs in the upper 40s to mid 50s. North winds 5 to 10 mph. Chance of showers 20 percent.

Saturday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog and frost after midnight. Lows in the mid 30s to lower 40s. North winds 5 to 10 mph.

Sunday: Partly cloudy. Highs in the 40s to mid 50s.

Sunday Night: Clear except for frost. Lows in the 30s to lower 40s.

Monday: Sunny. Areas of frost. Highs in the upper 40s to lower 60s.

Monday Night and Tuesday: Mostly clear. Lows in the mid 30s to lower 40s. Highs in the upper 40s to lower 60s.

Tuesday Night: Mostly clear except patchy fog. Lows in the mid 30s to lower 40s.

Wednesday: Partly cloudy in the morning then becoming sunny. Highs in the upper 40s to lower 60s.

Wednesday Night: Partly cloudy. Patchy fog. A slight chance of showers. Lows in the upper 30s to mid 40s.

New Years Day: Mostly cloudy. Patchy fog. A chance of showers. Highs in the 40s to mid 50s.

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 San Francisco Bay Area-Monterey 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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Verification - Historical Graphical RVF
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