Major Flood
14 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
12 ft
Minor Flood
9 ft
Action Stage
7.5 ft
What Floods at Each Level
14 ft
Major tributary flooding is occurring due to backwater. Significant portions of the city of Decatur...near the Tennessee River and Flint Creek...are flooded. Point Mallard Parkway between U.S. 31 and Priceville is completed flooded and closed. Portions of southern Limestone County near Wheeler Lake are flooded.
12 ft
Extensive backwater flooding is occurring on Flint Creek and Swan Creek near Decatur. Floodwaters may threaten homes and cause road closures.
9.4 ft
Evacuations of 200 plus campsites are ongoing at Point Mallard Campground, with 1 to 2 feet of water now affecting the majority of the campsites along the slough, approaching the Main Office on the property. Water may also be beginning to flow across Point Mallard Drive to the West of the property.
9 ft
Flooding begins to affect locations on the Morgan County side of the river near Decatur, along with low-lying areas of Limestone County within the Wheeler Wildlife Refuge. Evacuations are likely ongoing at Point Mallard Campground.
7.5 ft
Backwater continues backing up into tributaries. Flooding at Point Mallard Campground now begins to affect campsites along the river. Widespread evacuations are not required at this time, but may become likely with additional rises on the river. In Limestone County, flooding of a roadside park on the bank of the river on U.S. Highway 31 is occurring.
7 ft
Backwater issues and nuisance flooding begins at this level as the Tennessee River backs up into tributaries along the river. Specifically, backwater issues begin at Point Mallard Campground with water beginning to flood the lower portions of the river bank, affecting the Spirit of America Pavilion along a nearby slough.
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 14, 1867 | 14.8 ft | — |
| May 10, 2003 | 10.29 ft | — |
| Feb 24, 2019 | 10.11 ft | — |
About This Gauge
USGS Site
NWS LID
DECA1
River
Tennessee River
County
Morgan, AL
Coordinates
34.6114°N, 86.9753°W
Get Flood Alerts for Tennessee River
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 Tennessee River at Decatur?
The Tennessee River at Decatur gauge is maintained by USGS (site 03577150) 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 Tennessee River at Decatur?
The NWS-defined flood stage for Tennessee River at Decatur is 9 feet. Action stage begins at 7.5 feet. Moderate flooding starts at 12 feet, and major flooding at 14 feet.
How do I get alerts when Tennessee River rises?
Download StormCast free on Google Play, go to River Gauges, and add Tennessee River at Decatur 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 Tennessee River at Decatur gauge located?
The gauge is located in Morgan County, Alabama at coordinates 34.6114°N, 86.9753°W. USGS site number: 03577150. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: Tennessee Valley Authority (TVA), Observations courtesy of U.S. Geological Survey
- Gauge reading affected by reservoir operations.