Big Sioux River at Sioux Falls, SD
Is Big Sioux River at Sioux Falls, SD flooding right now?
Big Sioux River at Sioux Falls, SD measured 1.47 ft on 2026-09-11 01:00:00 UTC. That observation was 6.5 ft below its 8 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
1.47 ft
Streamflow
85 cfs
Minor flooding here begins at 8 ft, with major flooding at 15.5 ft. The highest crest on record was 16.9 ft on Thu, Mar 14, 2019.
Streamflow outlook
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 6.5 ft | 5.0 ft below |
| Minor flood | 8 ft | 6.5 ft below |
| Moderate flood | 12 ft | 10.5 ft below |
| Major flood | 15.5 ft | 14.0 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 16.9 ft | 2019-03-14 |
| 16.01 ft | 1957-06-17 |
| 15.8 ft | 1984-06-21 |
| 15.56 ft | 1960-03-30 |
| 15.44 ft | 2024-06-22 |
Last 7 days
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Skunk Creek at Sioux Falls, SD | 3.1 mi | Minnehaha County |
| Big Sioux River at North Cliff Ave at Sioux Falls, SD | 4.9 mi | Minnehaha County |
| Big Sioux River below Diversion at Sioux Falls, SD | 5.0 mi | Minnehaha County |
| Silver Creek at Sioux Falls, SD | 7.0 mi | Minnehaha County |
| Willow Creek near Crooks, SD | 9.8 mi | Minnehaha 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.