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:

Apr 29 2025 at 7:39 AM PDT

Next Issuance:

Apr 30 2025 at 9:00 AM PDT

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
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
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
2020*	7,050	7.63	Dec 7, 2019
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
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)

Today: Sunny. Patchy dense fog in the morning. Highs in the mid 60s to upper 70s. South winds 5 to 10 mph.

Tonight: Partly cloudy. Patchy fog after midnight. Lows in the 40s to mid 50s. Southwest winds 5 to 10 mph.

Wednesday: Sunny. Patchy fog in the morning. Highs in the mid 60s to lower 80s. Southwest winds 5 to 10 mph.

Wednesday Night: Mostly clear except patchy fog after midnight. Lows in the 40s to mid 50s. Southwest winds 5 to 15 mph.

Thursday: Sunny. Patchy fog in the morning. Highs in the 60s to 70s. Southwest winds 5 to 10 mph.

Thursday Night: Clear in the evening then becoming partly cloudy. Patchy fog. Lows in the mid 40s to lower 50s.

Friday: Partly cloudy in the morning then becoming sunny. Highs in the lower 60s to mid 70s.

Friday Night: Mostly cloudy. A slight chance of rain. Lows near 50.

Saturday and Saturday Night: Partly cloudy. A slight chance of rain. Highs in the upper 50s to mid 60s. Lows in the mid 40s to lower 50s.

Sunday through Monday: Partly cloudy. Highs in the 60s to lower 70s. Lows in the mid 40s to lower 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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