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Latitude: 38.50º N | Longitude: 123.00º W | Elevation: 65 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: 29.0 Feet | Minor Flood: 32.0 Feet | Moderate Flood: 35.0 Feet | Major Flood: 40.0 Feet |
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). |
Historical Stage/Flow Data |
|||
Water Year
|
Peak Discharge (cfs)
|
Stage (feet)
|
Date
|
Most Recent 5 Years | |||
2024* |
37,500** |
28.91 |
Feb 6, 2024 |
2023* |
44,600** |
31.83 |
Jan 10, 2023 |
2022* |
25,600** |
23.49 |
Oct 25, 2021 |
2021* |
2,950** |
8.24 |
Feb 13, 2021 |
2020* |
6,930** |
12.10 |
Dec 8, 2019 |
Historical High Stage/Flow Events (Period of Record - February 1940 to Present) - Ranked by Flow | |||
1986* |
102,000** |
49.50 |
Feb 18, 1986 |
1995* |
93,900** |
48.00 |
Jan 10, 1995 |
1965* |
93,400** |
47.35 |
Dec 23, 1964 |
1956 |
90,100** |
47.62 |
Dec 23, 1955 |
1940 |
88,400** |
46.87 |
Feb 28, 1940 |
2019* |
85,300** |
45.38 |
Feb 27, 2019 |
* Discharge affected to unknown degree by regulation or diversion | |||
** Estimated |
Location Photographs | ||
ESRI™ Locator Map |
Flood Impacts | |
49.5 Feet | Flood of record. 2/18/1986 (102,000cfs). |
48.5 Feet | Near record flooding. In Guerneville the Veterans building and the Sheriffs substation begin to flood. |
47.0 Feet | In Guerneville businesses on the north side of Main Street flood. Travel most areas impossible. |
46.0 Feet | Disastrous flooding. In Guerneville much of downtown floods. The Guerneville post office begins to flood. In Rio Nido, River Road floods. |
45.0 Feet | Disastrous flooding is forecast to occur along the lower Russian River. Much of downtown Guerneville will become inundated. Many roads will flood making travel nearly impossible throughout the reach. |
44.0 Feet | In Guerneville HWY 116 west of town closed. Safeway floods. In Monte Rio and Guerneville Park the main business sections flood. Travel in most areas nearly impossible. |
41.5 Feet | In Guerneville, River Road closed. In Monte Rio the main intersections flood. Monte Rio Elementary School begins to flood. |
40.0 Feet | Major flooding is expected along the Russian River. In Guerneville travel on River Road becomes very difficult. In Northwood upper Redwood Drive floods. In Cazadero Austin Creek Road floods. |
39.0 Feet | West of Duncan Mills HWY 116 is closed. In Hacienda River Road floods. In Rio Nido Canyon 7 Road at the miniture golf course floods. In Guerneville the Triple R Resort begins to flood. |
38.0 Feet | In Duncan Mills Freezeout Road at Moscow Road floods. In Guerneville Park Cazadero Road at HWY 116 floods. |
37.0 Feet | In Forestville Mirabel Road at River Road floods. In Guerneville River Road east of Guerneville floods. Mill Street and 5th Street flood. In Monte Rio River Blvd east of Monte Rio floods. |
36.0 Feet | In Forestville Mirabel Park Resort and Mirabel trailer park flood. In Guerneville Fern Road at HWY 116 floods. |
35.0 Feet | Moderate flooding is forecast along the lower Russian River. Numerous businesses and residences in the lowest sections of towns within the reach are expected to flood. In Guerneville Brookside Resort begins to flood. More extensive flooding occurs at Parkers Resort. In Northwood lower Redwood Drive floods. |
34.0 Feet | In Guerneville flooding begins at Johnsons Resort, Parkers Resort, Creekside Resort and Riverside Park. In Northwood lower Redwood Drive begins to flood. |
33.0 Feet | In Guerneville the intersection of HWY 116 and Drake Rd is closed. In Monte Rio Willow and Alder Streets flood. In Forestville Mirabel trailer park begins to flood. |
32.5 Feet | In Guerneville the intersecton of HWY 116 and Neeley Rd is closed. Mays Canyon Rd by the old rodeo grounds is closed. |
32.0 Feet | Flood stage. Minor flooding. Lower Mill Street in Guerneville and Old Bohemian Highway in Monte Rio are expected to flood. |
29.0 Feet | Monitor stage. |
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. |