National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service


Latitude: 38.50º NLongitude: 123.00º WElevation: 65 Feet
Location: Sonoma County in CaliforniaRiver Group: Russian Napa
Monitor Stage: 29.0 FeetFlood Stage: 32.0 Feet

Observed Data Credit
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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)
 Most Recent 5 Years
Mar 11, 2016
Dec 12, 2014
Feb 9, 2014
Dec 24, 2012
Mar 28, 2012
 Historical High Stage/Flow Events (Period of Record - February 1940 to Present)
Feb 18, 1986
Feb 19, 1995
Dec 23, 1964
Dec 23, 1955
Feb 28, 1940
 * Discharge affected to unknown degree by regulation or diversion
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ506)
Today: Mostly cloudy. Patchy fog in the morning. A chance of showers and a slight chance of thunderstorms in the afternoon. Highs in the 40s to upper 50s. West winds 10 to 20 mph.

Tonight: Mostly cloudy. A slight chance of thunderstorms in the evening. A chance of showers. Lows in the lower 30s to mid 40s. West winds 10 to 20 mph.

Sunday: Mostly cloudy. A slight chance of showers. Highs in the 50s to lower 60s. Northwest winds 10 to 20 mph.

Sunday Night: Partly cloudy. Lows in the 30s to lower 40s. Northwest winds 10 to 20 mph.

Monday: Partly cloudy. Highs in the 50s to upper 60s. Northwest winds 10 to 20 mph.

Monday Night: Mostly clear. Lows in the 30s to mid 40s.

Tuesday through Friday: Mostly clear. Highs in the mid 60s to lower 80s. Lows in the mid 30s to lower 50s.
Impacts - E19 Information
32.0 FeetMinor flooding. Lower Mill Street in Guerneville and Old Bohemian Hwy in Monte Rio is closed.
32.5 FeetIn Guerneville the intersection of Hwy 116 and Neely Road is closed. Mays Canyon Road by the Old Rodeo Grounds is closed.
33.0 FeetIn Guerneville the intersection of Hwy 116 and Drake Road is closed. In Monte Rio, Willow and Alder Streets flood. In Forestville, Marabel Trailer Park begins to flood.
34.0 FeetIn Guerneville, flooding begins at Johnsons Resort, Parkers Resort, Creekside Resort, and Riverside Park. In Northwood, Lower Redwood Drive begins to flood.
35.0 FeetNumerous businesses and homes in the lowest sections of towns begin to flood. In Guerneville, Sonoma West Inn begins to flood. More extensive flooding occurs at Parkers Resort. In Northwood, Lower Redwood Drive floods.
36.0 FeetIn Forestville, Marabel Park Resort and Marabel Trailer Park flood. In Guerneville, Fern Road at Hwy 116 floods.
37.0 FeetIn Forestville, Marabel 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.
38.0 FeetIn Duncan Mills, Freezout Road at Moscow Road floods. In Guerenville, Park Cazadero Road at Hwy 116 floods.
39.0 FeetWest of Duncan Mills, Hwy 116 closed. In Hacienda, River Road floods. In Rio Nido, Canyon 7 Road at the miniature golf course floods. In Guerneville, the Triple R Resort begins to flood.
40.0 FeetIn Guerneville, travel on River Road very difficult. In Northwood, Upper Redwood Drive floods. In Cazadero, Austin Creek Road floods.
41.5 FeetIn Guerneville, River Road closed. In Monte Rio, the main intersections flood. Monte Rio Elementary School begins to flood.
44.0 FeetIn 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.
46.0 FeetIn Guerneville, much of downtown floods. The Guerneville Post Office begins to flood. In Rio Nido, River Road floods.
47.0 FeetIn Guerneville, businesses on the north side of Main Street flood. Travel most areas impossible.
48.5 FeetIn Guerneville, the Veterans Building and Sheriffs Substation begin to flood.
49.5 FeetFlood of Record. 02/18/1986 (102,000 cfs)
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.