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National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service
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NAPA RIVER - NAPA (APCC1)
Latitude: 38.37º NLongitude: 122.30º WElevation: 25 Feet
Location: Napa County in CaliforniaRiver Group: Russian Napa
Issuance Time: Apr 22 2014 at 7:56 AM PDTNext Issuance: Apr 23 2014 at 9:00 AM PDT
Monitor Stage: 22.0 FeetFlood Stage: 25.0 Feet
Verification - Historical Graphical RVF
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Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
2012*
5,730
18.27
Mar 14, 2012
2011*
11,800
22.86
Mar 20, 2011
2010*
6,460
18.68
Jan 20, 2010
2009*
6,600
18.84
Feb 22, 2009
2008*
8,030
20.29
Jan 04, 2008
 Historical High Stage/Flow Events (Period of Record - Oct 1959 to Present)
1986*
37,100
30.20
Feb 18, 1986
1995*
32,600
30.50
Mar 09, 1995
2006*
29,600
29.85
Dec 31, 2005
 * Discharge affected by regulation or diversion
Location Photographs
Google™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ506)
Today: Partly cloudy in the morning then becoming mostly cloudy. Highs in the upper 50s to lower 70s. West winds 10 to 20 mph.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. A slight chance of rain after midnight. Lows in the 40s to lower 50s. West winds 10 to 20 mph.

Thursday: Mostly cloudy. Highs in the upper 50s to lower 70s. West winds 10 to 20 mph.

Thursday Night: Mostly cloudy. Breezy. A slight chance of showers in the evening and then a chance of showers after midnight. Lows in the mid 40s to lower 50s. West winds 20 to 30 mph and Becoming southwest 10 to 15 mph after midnight. Chance of showers 40 percent.

Friday: Mostly cloudy. A chance of showers and a slight chance of thunderstorms. Highs in the lower 50s to mid 60s. West winds 5 to 10 mph increasing to 15 to 20 mph in the afternoon. Chance of precipitation 50 percent.

Friday Night: Partly cloudy. A slight chance of showers. Lows in the 30s to upper 40s.

Saturday: Partly cloudy in the morning then becoming mostly cloudy. Highs in the lower 50s to mid 60s.

Saturday Night: Mostly cloudy. A slight chance of showers. Lows in the 40s to lower 50s.

Sunday and Sunday Night: Mostly cloudy. Highs in the upper 50s to lower 70s. Lows in the 40s to lower 50s.

Monday: Partly cloudy. Highs in the mid 60s to lower 80s.

Monday Night and Tuesday: Mostly clear. Lows in the 40s to mid 50s. Highs in the upper 60s to mid 80s.
Impacts - E19 Information
22.0 FeetErosion of lowest agricultural areas along the Napa River will occur.
25.0 FeetFlooding of lower portions of Yountville and Napa near the Napa River begin to flood with some secondary roads inundated.
26.0 FeetModerate flooding can be expected with crop losses and erosion damage to agricultural areas along the Napa River. Some primary and many secondary roads will become inundated.
28.0 FeetMajor flooding of Yountville and Napa can be expected. Major damage and inundation to farm land will occur in the Napa Valley. Many roads will become inundated making travel difficult in the lower Napa Valley.
30.0 FeetMajor flood damage can be expected across the Napa Valley. Most roads will become flooded with transportation becoming almost impossible. At least 20,000 acres of farm land is forecast to flood in the Napa Valley.
32.0 FeetDisastrous flooding can be expected across the entire lower Napa Valley with transportation impossible. Disastrous flood damage can be expected across towns 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.

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.