Napa River near Napa
California — Water Level & Flood Stage
Located in Napa County, California on the Napa River. Live water level data from USGS gauge 11458000, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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Flood Stages
Major Flood
28 ft
23,400 cfs
Moderate Flood
26 ft
18,000 cfs
Minor Flood
25 ft
15,600 cfs
Action Stage
22 ft
10,200 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
32 ft
Disastrous flooding. Widespread flooding occurs in the entire Napa Valley, with transportation impossible. Disastrous damage to homes and businesses in the Napa Valley, especially in the City of Napa.
30 ft
In the City of Napa, flooding in the south oxbow area expands south towards Tulocay Creek and Imola Avenue begins to flood on both sides of the river. Major flooding continues in the Napa Valley, with major damage to homes and businesses, especially in 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 2/18/86 record flood, 37,000 cfs, 30.20 feet.
29 ft
In the City of Napa, the Soscol corridor between the bypass and Lakepark in inundated, and the Lakepark area begins to flood and flow begins to leave the Napa River at Riverside Drive.
28 ft
Major flooding. In the City of Napa, significant flooding occurs near Lincoln Avenue with some secondary roads inundated. Major flooding of towns within the reach of the gage, especially in Napa. Inundation of agricultural land and major damage from bank erosion and sediment deposition in Napa Valley. Transportation difficult throughout the Napa Valley. The 1/1/1997 flood measured 28.07 feet and cut off east-west travel except at Highway 29 over the Napa River.
27 ft
In the City of Napa, moderate flooding begins on the east side of Napa River near Milliken Creek Inn.
26 ft
Moderate flooding. In the City of Napa, flow begins to leave the Napa River channel in the South Coombs area (north of Imola Avenue) and the south oxbow (near Taylor Street). Crop 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.
25 ft
Flood Stage. Flooding of 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.
24 ft
In the City of Napa, flow begins to leave the Napa River channel at Riverpointe (north of Lincoln Avenue).
22 ft
Monitor Stage. In the City of Napa, the Napa River Dry Bypass is fully inundated and flow begins to cross McKinstry Street.
20 ft
Erosion of lowest agricultural areas along river begins.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 9, 1995 | 30.5 ft | 32,600 cfs |
| Mar 9, 1995 | 30.5 ft | 32,600 cfs |
| Feb 17, 1986 | 30.2 ft | 37,100 cfs |
| Feb 17, 1986 | 30.2 ft | 37,100 cfs |
| Dec 31, 2005 | 29.85 ft | 29,600 cfs |
About This Gauge
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Frequently Asked Questions
What is the current water level of Napa River near Napa?
The Napa River near Napa gauge is maintained by USGS (site 11458000) and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Napa River near Napa?
The NWS-defined flood stage for Napa River near Napa is 25 feet. Action stage begins at 22 feet. Moderate flooding starts at 26 feet, and major flooding at 28 feet.
How do I get alerts when Napa River rises?
Download StormCast free on Google Play, go to River Gauges, and add Napa River near Napa to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Napa River near Napa gauge located?
The gauge is located in Napa County, California at coordinates 38.3682°N, 122.3033°W. USGS site number: 11458000. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: US Geological Survey, Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers