Major Flood
9 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
8.5 ft
Minor Flood
8 ft
Action Stage
7 ft
What Floods at Each Level
12 ft
The bridge at the gauge and the bridge 2 miles south of the gauge are both overtopped
10.5 ft
The bridge 1 mile north of the gauge is overtopped
10 ft
The water reaches the bottom of the bridge at the gauge and the bridge 2 miles south of the gauge the bridge 1 mile east and 1 1/2 mile north of the gauge is overtopped
9 ft
The water reaches the bottom of the bridge 1 mile north of the gauge
8.5 ft
The water reaches the bottom of the bridge 1 mile east and 1 1/2 mile north of the gauge
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 |
|---|---|---|
| Apr 12, 2023 | 9.7 ft | 2,480 cfs |
| Apr 1, 1997 | 9.52 ft | 2,000 cfs |
| Jul 24, 1993 | 9.18 ft | 1,280 cfs |
About This Gauge
Get Flood Alerts for Big Sioux 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 Big Sioux River near Florence?
The Big Sioux River near Florence gauge is maintained by USGS (site 06479215) 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 Big Sioux River near Florence?
The NWS-defined flood stage for Big Sioux River near Florence is 8 feet. Action stage begins at 7 feet. Moderate flooding starts at 8.5 feet, and major flooding at 9 feet.
How do I get alerts when Big Sioux River rises?
Download StormCast free on Google Play, go to River Gauges, and add Big Sioux River near Florence 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 Big Sioux River near Florence gauge located?
The gauge is located in Grant County, South Dakota at coordinates 45.1808°N, 97.1858°W. USGS site number: 06479215. Data is provided by the U.S. Geological Survey and the National Weather Service.
More Gauges on Big Sioux River
On This River
Downstream: Big Sioux River near Watertown
More Resources
Source & Notes
Data provided by: Observations courtesy of U.S. Geological Survey
- Stage may be affected by ice.