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

NAPA RIVER - NAPA (APCC1)
Latitude: 38.37º NLongitude: 122.30º WElevation: 25 Feet
Location: Napa County in CaliforniaRiver Group: Russian Napa
Issuance Time: Sep 02 2014 at 6:14 AM PDTNext Issuance: Sep 03 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
2013*
13,100
23.65
Dec 24, 2012
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
 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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (CAZ506)
Tonight: Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the upper 40s to lower 60s. Southwest winds 10 to 20 mph.

Wednesday: Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the lower 70s to mid 80s. South winds 5 to 15 mph.

Wednesday Night: Clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the 50s. Southwest winds 10 to 20 mph.

Thursday: Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the upper 60s to mid 80s. Southwest winds 10 to 15 mph.

Thursday Night: Clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the 50s. Southwest winds 10 to 20 mph.

Friday: Mostly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 80s.

Friday Night through Tuesday: Mostly clear. Lows in the 40s to upper 50s. Highs in the lower 70s 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.