CNRFC - Hydrology - Observed River/Reservoir Conditions

RUSSIAN RIVER - GUERNEVILLE (GUEC1)

Latitude: 38.50º N	Longitude: 123.00º W	Elevation: 65 Feet
Location: Sonoma County in California		River Group: Russian Napa

Monitor Stage: 29.0 Feet

Flood Stage: 32.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

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
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ506)

rest of Tonight: Mostly clear. Lows in the lower 50s to mid 60s. Southwest winds 5 to 10 mph.

Friday: Sunny. Highs in the upper 70s to lower 90s. South winds 5 to 15 mph.

Friday Night: Mostly clear except patchy fog after midnight. Lows in the 50s to lower 60s. Southwest winds 5 to 15 mph.

Saturday: Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 70s to 80s. Southwest winds 5 to 15 mph.

Saturday Night: Clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the 50s. Southwest winds 10 to 15 mph.

Sunday: Mostly cloudy in the morning then becoming sunny. Patchy fog. Highs in the 70s to 80s.

Sunday Night: Mostly clear in the evening then becoming partly cloudy. Patchy fog. Lows in the 50s.

Monday: Mostly cloudy in the morning then becoming sunny. Highs in the 70s to 80s.

Monday Night: Mostly clear in the evening then becoming mostly cloudy. Patchy fog. Lows in the lower to mid 50s.

Tuesday: Mostly cloudy in the morning then becoming sunny. Areas of fog. Highs in the upper 60s to mid 80s.

Tuesday Night: Mostly clear in the evening then becoming mostly cloudy. Patchy fog. Lows in the 50s.

Wednesday and Wednesday Night: Partly cloudy. Areas of fog. Highs in the upper 60s to lower 80s. Lows in the 50s.

Thursday: Mostly cloudy in the morning then becoming sunny. Widespread fog. Highs in the upper 60s to lower 80s.

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.

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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