Corson County weather alerts
There are no active weather alerts for Corson County, SD right now.
Since 2016 the National Weather Service has issued about 1,080 alerts that included Corson County, roughly 108 a year. The most common is the severe thunderstorm warning (282 from 2016 to 2025). The last tornado warning was issued on September 14, 2025. 23 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Corson County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Perkins County, Sioux County, Dewey County, Walworth County.
Corson County alert history
Alert events that included Corson County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 282 | 25 | September 28, 2026 |
| Wind Advisory | 150 | 14 | November 2, 2026 |
| Severe Thunderstorm Watch | 94 | 11 | August 30, 2026 |
| Winter Weather Advisory | 81 | 10 | April 1, 2026 |
| Dense Fog Advisory | 68 | 8 | November 6, 2026 |
| Cold Weather Advisory | 66 | 2 | January 23, 2026 |
| Red Flag Warning | 51 | 9 | September 8, 2026 |
| High Wind Warning | 34 | 3 | March 12, 2026 |
| Fire Weather Watch | 33 | 5 | July 13, 2026 |
| Flood Warning | 27 | 1 | September 28, 2026 |
| Extreme Cold Warning | 24 | 1 | January 23, 2026 |
| Winter Storm Watch | 24 | 2 | April 3, 2026 |
| High Wind Watch | 23 | 2 | March 12, 2026 |
| Winter Storm Warning | 21 | 2 | April 3, 2026 |
| Heat Advisory | 18 | 5 | August 2, 2026 |
| Frost Advisory | 15 | 3 | May 20, 2026 |
| Blizzard Warning | 14 | 0 | December 25, 2023 |
| Freeze Warning | 14 | 1 | October 14, 2026 |
| Flash Flood Warning | 9 | 0 | September 13, 2025 |
| Tornado Warning | 9 | 0 | September 14, 2025 |
| Freeze Watch | 6 | 0 | October 7, 2023 |
| Tornado Watch | 5 | 3 | June 29, 2026 |
| Flood Watch | 4 | 2 | September 28, 2026 |
| Extreme Cold Watch | 3 | 1 | January 23, 2026 |
| Extreme Heat Warning | 2 | 2 | July 26, 2026 |
| Ice Storm Warning | 2 | 0 | December 11, 2025 |
| Extreme Heat Watch | 1 | 0 | July 19, 2016 |
Tornado history in Corson County
23 tornadoes have been recorded in Corson County since 1950, injuring 4 people. That ranks 42 of 66 counties in South Dakota. The most recent was on September 14, 2025 (rated unknown).
Strongest tornadoes in Corson County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 29, 1953 | F2 | Corson County | 0.5 mi | 33 yd | 0 | 2 |
| April 19, 1955 | F0 | Corson County | 7.2 mi | 50 yd | 0 | 2 |
| April 19, 1955 | F0 | Corson County | 3.8 mi | 50 yd | 0 | 0 |
| June 8, 1999 | F0 | Corson County | 2 mi | 20 yd | 0 | 0 |
| June 10, 1977 | F0 | Corson County | 0.5 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| September 14, 2025 | ? | Corson County | 0 mi | 1 yd | 0 | 0 |
| June 8, 2021 | EF0 | Corson County | 0.2 mi | 10 yd | 0 | 0 |
| August 14, 2011 | EF0 | Corson County | 0.2 mi | 10 yd | 0 | 0 |
| August 14, 2011 | EF0 | Corson County | 0.2 mi | 10 yd | 0 | 0 |
| August 10, 2007 | EF0 | Corson County | 0.2 mi | 10 yd | 0 | 0 |
About Corson County
- Population: 3,747 (2024 estimate)
- State: South Dakota
- NOAA Weather Radio SAME code: 046031 (how to use it)