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: Jul 31 2015 at 7:14 AM PDTNext Issuance: Aug 01 2015 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
2014*
3,070
15.11
Feb 9, 2014
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
 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)
Rest of Today: Mostly cloudy. A slight chance of thunderstorms in the afternoon. Highs in the mid 70s to lower 90s. Southwest winds 10 to 20 mph.

Tonight: Partly cloudy in the evening then becoming mostly cloudy. A slight chance of thunderstorms in the evening. Lows in the mid 50s to lower 60s. West winds 10 to 20 mph.

Saturday: Partly cloudy. Highs in the mid 70s to upper 80s. Southwest winds 10 to 20 mph.

Saturday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the 50s to lower 60s. West winds 10 to 20 mph.

Sunday: Partly cloudy in the morning then becoming sunny. Highs in the lower 70s to mid 80s. Southwest winds 5 to 15 mph.

Sunday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the 50s to lower 60s.

Monday through Tuesday: Partly cloudy. Highs in the lower 70s to mid 80s. Lows in the 50s to lower 60s.

Tuesday Night through Thursday: Mostly clear. Lows in the 50s to lower 60s. Highs in the 70s to 80s.
Impacts - E19 Information
20.0 FeetErosion of lowest agricultural areas along river begins.
22.0 FeetIn the city of Napa, flow begins to enter the Napa River Dry Bypass at McKinstry Street.
24.0 FeetIn the city of Napa, flow begins to leave the Napa River channel in the south Coombs area (north of Imola Avenue). Flow may also leave Tulocay Creek in the Soscol Gateway area.
25.0 FeetExpansion of minor flooding at various initial break out points in the city of Napa and surrounding area. Flooding of the 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 FeetCrop 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. In the city of Napa, flow begins to leave the channel at River Pointe (near Lincoln Avenue).
27.0 FeetIn the city of Napa, significant flooding near Lincoln Avenue with some secondary roads inundated. Flooding in the Soscol Gateway area and in the south Coombs area (north of Imola Avenue). Flow begins to leave the Napa River oxbow near Taylor Street.
28.0 FeetMajor flooding of towns within the reach of the gage, especially in Napa. Inundation of agricultural land, major damage from bank erosion and sediment deposition in Napa Valley. Transportation difficult throughout the Napa Valley. Use Highway 29 on west side of Napa valley or flood evacuation route on the east side of Napa Valley to evacuate. The 1/1/1997 flood measured 28.07 feet and cut off east-west travel except at Highway 29 over the Napa River.
30.0 FeetMajor flooding continues in the Napa Valley. Major flood damage to homes and businesses in the Napa Valley, especially Napa. Transportation impossible in the Napa Valley. 20,000 acres possibly flooded in the Napa Valley. Between 5,000 and 7,000 evacuations occurred in the 2/18/1986 record flood with 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.

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.