Big Sioux River near Florence, SD
Is Big Sioux River near Florence, SD flooding right now?
Big Sioux River near Florence, SD measured 2.80 ft on 2026-09-11 01:00:00 UTC. That observation was 5.2 ft below its 8 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
2.80 ft
Streamflow
9 cfs
Minor flooding here begins at 8 ft, with major flooding at 9 ft. The highest crest on record was 9.7 ft on Thu, Apr 13, 2023.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 7 ft | 4.2 ft below |
| Minor flood | 8 ft | 5.2 ft below |
| Moderate flood | 8.5 ft | 5.7 ft below |
| Major flood | 9 ft | 6.2 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 9.7 ft | 2023-04-13 |
| 9.52 ft | 1997-04-02 |
| 9.18 ft | 1993-07-25 |
| 9.08 ft | 1986-03-29 |
| 9.07 ft | 2001-04-07 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Still Lake Outflow near Florence, SD | 9.9 mi | Codington County |
| Blue Dog Lake Inflow Owens Creek near Waubay, SD | 11.9 mi | Day County |
| Big Sioux River near Watertown, SD | 12.1 mi | Codington County |
| Mud Creek near Rauville, SD | 12.5 mi | Codington County |
| Lake Kampeska Inlet/Outlet near Watertown, SD | 16.0 mi | Codington County |
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Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.