NOAA - National Weather Service - California Nevada River Forecast Center

NAPA RIVER - NAPA (APCC1)

Latitude: 38.37º N	Longitude: 122.30º W	Elevation: 25 Feet
Location: Napa County in California		River Group: Russian Napa

Issuance Time:

May 19 2013 at 9:09 AM PDT

Next Issuance:

May 20 2013 at 9:00 AM PDT

Monitor Stage: 22.0 Feet

Flood Stage: 25.0 Feet

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
Upstream Photo	Gage House Photo	Downstream Photo

Google™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ506)

Today: Sunny. Highs near 90. North winds 5 to 10 mph and becoming northwest in the afternoon.

Tonight: Mostly clear. Lows in the lower 50s. West winds 5 to 15 mph.

Tuesday: Sunny. Highs in the 70s to lower 80s. West winds 10 to 20 mph.

Tuesday Night: Mostly clear. Lows in the upper 40s. Northwest winds 10 to 20 mph.

Wednesday: Sunny. Highs in the lower to mid 70s. Northwest winds 5 to 15 mph.

Wednesday Night: Mostly clear. Lows in the mid 40s to lower 50s.

Thursday and Thursday Night: Mostly clear. Highs near 70. Lows in the mid 40s to lower 50s.

Friday through Sunday: Partly cloudy. Highs in the 70s to lower 80s. Lows in the upper 40s.

Impacts - E19 Information
22.0 Feet	Erosion of lowest agricultural areas along the Napa River will occur.
25.0 Feet	Flooding of lower portions of Yountville and Napa near the Napa River begin to flood with some secondary roads inundated.
26.0 Feet	Moderate 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 Feet	Major 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 Feet	Major 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 Feet	Disastrous 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
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.