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

 |  End of River Group

Latitude: 38.37º NLongitude: 122.30º WElevation: 25 Feet
Location: Napa County in CaliforniaRiver Group: Russian Napa
Issuance Time: Mar 17 2018 at 8:39 AM PDTNext Issuance: Mar 18 2018 at 9:00 AM PDT
Monitor Stage: 22.0 FeetFlood Stage: 25.0 Feet
Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
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Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
 Most Recent 5 Years
Mar 6, 2016
Dec 11, 2014
Feb 9, 2014
Dec 24, 2012
Mar 14, 2012
 Historical High Stage/Flow Events (Period of Record - Oct 1959 to Present)
Feb 18, 1986
Mar 09, 1995
Dec 31, 2005
 * Discharge affected by regulation or diversion
Location Photographs
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ506)
Rest of Tonight: Mostly cloudy. Patchy dense fog. Lows in the upper 20s to lower 40s. North winds 5 to 10 mph.

Sunday: Mostly cloudy in the morning then becoming partly cloudy. Patchy dense fog in the morning. Highs in the 50s to lower 60s. East winds 5 to 10 mph and becoming south 10 to 15 mph in the afternoon.

Sunday Night: Mostly cloudy in the evening then becoming partly cloudy. Lows in the 30s to lower 40s. Northwest winds 5 to 15 mph.

Monday: Partly cloudy in the morning then becoming sunny. Highs in the 60s. Northeast winds 10 to 15 mph and becoming east 10 to 20 mph in the afternoon.

Monday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the 40s. Southeast winds 5 to 15 mph.

Tuesday: Breezy. Rain likely. Rain may be heavy at times. Highs in the 50s.

Tuesday Night and Wednesday: Rain likely. Lows in the 40s to lower 50s. Highs in the lower 50s to mid 60s.

Wednesday Night: Breezy, rain. Lows in the 40s to lower 50s.

Thursday: Cloudy. A chance of rain. Highs in the 50s to lower 60s.

Thursday Night through Friday Night: Mostly cloudy. A chance of showers. Lows in the lower 30s to mid 40s. Highs in the 50s to lower 60s.

Saturday: Mostly cloudy. A slight chance of showers. Highs in the 50s to lower 60s.
Impacts - E19 Information
20.0 FeetErosion of lowest agricultural areas along river begins.
22.0 FeetIn the city of Napa, the Napa River Dry Bypass is fully inundated and flow begins to cross McKinstry Street.
24.0 FeetIn the city of Napa, flow begins to leave the Napa River channel at RiverPointe (North of Lincoln Avenue).
25.0 FeetFlooding of lowest parts of towns in reach begins. Inundation of lowest agricultural land in Napa Valley. Some secondary roads are inundated. Moderate damage from bank erosion and sediment deposition throughout the reach.
26.0 FeetIn the city of Napa, flow begins to leave the Napa River channel in the South Coombs area (north of Imola Avenue) and the south oxbow (near Taylor Street). Crop losses and erosion damage become serious. Moderate flood damage in lower parts of urban areas along the reach. Transportation in the Napa Valley becoming difficult. The flood of 2/3/1998 measured 26.72 feet.
27.0 FeetIn the city of Napa, moderate flooding begins on the east side of Napa River near Milliken Creek Inn.
28.0 FeetIn the city of Napa, significant flooding occurs near Lincoln Avenue with some secondary roads inundated. Major flooding of towns within the reach of the gage, especially Napa. Inundation of agricultural land, major damage from bank erosion and sediment deposition in Napa Valley. Transporation difficult throughout the Napa Valley. The 1/1/1997 flood measured 28.07 feet and cut off east-west travel except at Highway 29 over the Napa River.
29.0 FeetIn the city of Napa, the Soscol Corridor between the Bypass and LakePark is inundated, and the LakePark area begins to flood and flow begins to leave the Napa River at Riverside Drive.
30.0 FeetIn the city of Napa, flooding in the south oxbow area expands south towards Tulocay Creek and Imola Avenue begins to flood on both sides of the river. Major flooding continues in the Napa Valley, with major damage to homes and businesses, especially in Napa. Transportation impossible in the Napa Valley. 20,000 acres possible flooded in the Napa Valley. Between 5,000 and 7,000 evacuations occurred in the 2/18/1986 record flood, 37,000 cfs and 30.20 feet.
32.0 FeetWidespread flooding occurs in the entire Napa Valley, with transportation impossible. Disastrous damage to homes and businesses in the Napa Valley, especially the city of Napa.
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.