River stage
Last reported 2026-10-13 | NWS TMPS2
In brief
The Vermillion River at Lake Thompson, SD read 1687.21 ft on Oct 13, 2026, 2.79 ft below action stage.
Source: National Weather Service gauge TMPS2
| Rank | Crest | Date |
|---|---|---|
| 1 | 1695.08 ft | 2019-10-08 |
| 2 | 1695.05 ft | 2011-04-25 |
| 3 | 1694.06 ft | 2020-04-13 |
| 4 | 1693.75 ft | 1997-04-22 |
| 5 | 1692.95 ft | 1995-10-17 |
| 6 | 1692.85 ft | 1996-07-01 |
| 7 | 1692.35 ft | 1994-05-03 |
| 8 | 1691.84 ft | 2010-09-15 |
Flood crests recorded at this gauge by the National Weather Service.
Outlet elevation of the lake (using the NAVD88 elevation).
Some of the lowest lying areas around the lake begin to flood.
The lowest portions of some of the campgrounds north of Twin Lakes Rd begin to flood if Lake Henry levels are also elevated.
The lowest portions of 211th and Twin Lakes Rd near their junction may begins flood and most of the campgrounds north of Twin Lakes Rd will be flooded if Lake Henry levels are also elevated.
Portions of 211th and Twin Lakes Rd will be overtopped and water may approach some structures.
Record lake elevation reached in 2019 (using the NAVD88 elevation).
Several structures around the lake will be at risk of flooding.
218th St at the gage is overtopped.
Written by the local National Weather Service forecast office for this exact gauge.
No. The Vermillion River at Lake Thompson is at 1687.21 ft, 2.79 ft below action stage.
The National Weather Service sets action stage 1690 ft and minor flooding 1694 ft.
The highest crest on record is 1695.08 ft, on 2019-10-08.
Stage and flood information from the NOAA National Weather Service (gauge TMPS2). Last reading 2026-10-13. For flood safety decisions always follow official National Weather Service warnings.