Major Flood
12 ft
Current Water Level
Gage Height
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Streamflow
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Last Reading
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FLOOD STAGES
Know the flood categories.
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
Moderate Flood
11.9 ft
Minor Flood
9 ft
Action Stage
8 ft
What Floods at Each Level
11 ft
Major flooding occurs all around the north end of the lake, especially in Lakeport and Clearlake Oaks. Highway 20 around the north end of the lake is closed in some areas.
9 ft
Low lying structures and some main roads around the lake are threatened by the high lake levels.
8.5 ft
Minor flooding of some lake side residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8.5 ft
Minor flooding of some lakeside residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8 ft
Minor flooding of some lakeside residents occurs.
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 |
|---|---|---|
| Feb 23, 1998 | 11.51 ft | -9,999 cfs |
| Feb 1, 1986 | 11.34 ft | — |
| Jan 2, 1983 | 11.34 ft | — |
About This Gauge
Get Flood Alerts for Clear Lake
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 Clear Lake at Lakeport?
The Clear Lake at Lakeport gauge is maintained by USGS (site 11450000) 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 Clear Lake at Lakeport?
The NWS-defined flood stage for Clear Lake at Lakeport is 9 feet. Action stage begins at 8 feet. Moderate flooding starts at 11.9 feet, and major flooding at 12 feet.
How do I get alerts when Clear Lake rises?
Download StormCast free on Google Play, go to River Gauges, and add Clear Lake at Lakeport 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 Clear Lake at Lakeport gauge located?
The gauge is located in Lake County, California at coordinates 39.0390°N, 122.9133°W. USGS site number: 11450000. Data is provided by the U.S. Geological Survey and the National Weather Service.
On This River
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Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey, Observations courtesy of U.S. Army Corps of Engineers