Lake Hennessey
California — Water Level & Flood Stage
Located in Napa County, California. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: CDWC1). Live data may be limited. View on NWS AHPS →
Flood Stages
Action Stage
317 ft
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
7-Day Water Level Chart
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About This Gauge
NWS LID
CDWC1
County
Napa, CA
Coordinates
38.4819°N, 122.3728°W
Get Flood Alerts for Lake Hennessey
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Lake Hennessey ?
The Lake Hennessey gauge is maintained by USGS 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 Lake Hennessey ?
This gauge has NWS-defined flood categories. Check the flood stages section above for current thresholds.
How do I get alerts when this river rises?
Download StormCast free on Google Play, go to River Gauges, and add Lake Hennessey 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 Lake Hennessey gauge located?
The gauge is located in Napa County, California at coordinates 38.4819°N, 122.3728°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: Napa County