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| Latitude: 38.61º N | Longitude: 122.84º W | Elevation: 77 Feet | ||
| Location: Sonoma County in California | Bulletin Group: Russian Napa | River Group: Russian Napa | ||
| Action/Monitor: 20.0 Feet | Minor Flood: 23.0 Feet | Moderate Flood: 27.0 Feet | Major Flood: 29.0 Feet |
| Observed Data Credit | |
 | Raw streamflow data is provided by the US Geological Survey (USGS). |
Historical Stage/Flow Data |
|||
|
Water Year
|
Peak Discharge (cfs)
|
Stage (feet)
|
Date
|
| Most Recent 5 Years | |||
2025* |
41,100 |
21.66 |
Feb 4, 2025 |
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 | ||
| 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. |
| 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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