CNRFC - Hydrology - River Guidance - Graphical RVF

NAPA RIVER - NAPA (APCC1)

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

Monitor Stage: 22.0 Feet

Flood Stage: 25.0 Feet

Historical Info	Peak Discharge	Stage	Date
Period of Record	37,100 cfs	30.20 feet	Feb 18, 1986
Dec 1996 - Jan 1997	18,600 cfs	28.07 feet	Jan 01
1995	32,600 cfs	30.50 feet	Mar 09
Feb 1986	37,100 cfs	30.20 feet	Feb 18

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

Regional Location Map		Gage Station Location Map

Official 7 Day National Weather Service Forecast (CAZ506)

Tonight: Clear. Lows in the mid 30s to lower 40s. North winds around 5 mph.

Tuesday: Sunny. Highs in the 60s. Northwest winds up to 5 mph.

Tuesday Night: Mostly clear. Lows near 40. Light winds.

Wednesday: Sunny. Highs in the mid 60s to lower 70s. North winds up to 5 mph.

Wednesday Night: Clear. Lows near 40. Northwest winds around 5 mph in the evening and becoming light.

Thanksgiving Day: Mostly sunny. Highs in the lower to mid 60s.

Thursday Night: Partly cloudy. A chance of rain. Lows in the lower 40s.

Friday: Partly cloudy. Highs around 60.

Friday Night through Monday: Mostly clear. Lows in the upper 30s to mid 40s. Highs near 60.

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.