Major Flood
12 ft
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: SCZC1). Live data may be limited. View on NWS AHPS →
FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
10 ft
Minor Flood
9 ft
Action Stage
7 ft
What Floods at Each Level
12 ft
Major flood stage. Water is approximately 2 feet deep on Highway 128 and surrounding floodplain. Travel severely restricted or impossible and dangerous along Highway 128.
10 ft
Moderate flood stage. Water inundates floodplain, bridge deck at private driveway, and Highway 128. NWS will issue a Flash Flood Warning if not yet already issued.
9 ft
Minor flood stage. Flows begin to backwater at private driveway bridge crossing at gaging site. NWS may issue an urban/small stream advisory if not already issued.
7 ft
Monitor stage. Water is 2 feet below backwater conditions at private driveway at stream gaging site. NWS may issue a Flash Flood Watch if not yet already issued.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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About This Gauge
NWS LID
SCZC1
River
Sage Creek
County
Napa, CA
Coordinates
38.4914°N, 122.3353°W
Get Flood Alerts for Sage Creek
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 Sage Creek at Lake Hennessey?
The Sage Creek at 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 Sage Creek at Lake Hennessey?
The NWS-defined flood stage for Sage Creek at Lake Hennessey is 9 feet. Action stage begins at 7 feet. Moderate flooding starts at 10 feet, and major flooding at 12 feet.
How do I get alerts when Sage Creek rises?
Download StormCast free on Google Play, go to River Gauges, and add Sage Creek at 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.
Where is the Sage Creek at Lake Hennessey gauge located?
The gauge is located in Napa County, California at coordinates 38.4914°N, 122.3353°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Resources
Source & Notes
Data provided by: City of Napa