Grant County weather alerts
There are no active weather alerts for Grant County, SD right now.
Since 2016 the National Weather Service has issued about 964 alerts that included Grant County, roughly 96 a year. The most common is the severe thunderstorm warning (151 from 2016 to 2025). The last tornado warning was issued on June 10, 2026. 22 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 Grant County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Codington County, Lac qui Parle County, Big Stone County, Roberts County.
Grant County alert history
Alert events that included Grant County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 151 | 16 | September 12, 2026 |
| Winter Weather Advisory | 133 | 9 | April 3, 2026 |
| Wind Advisory | 114 | 7 | June 10, 2026 |
| Dense Fog Advisory | 111 | 14 | October 12, 2026 |
| Cold Weather Advisory | 73 | 3 | January 25, 2026 |
| Severe Thunderstorm Watch | 64 | 7 | August 9, 2026 |
| Winter Storm Watch | 40 | 1 | March 14, 2026 |
| Flood Warning | 35 | 2 | July 9, 2026 |
| Heat Advisory | 29 | 5 | July 29, 2026 |
| Blizzard Warning | 28 | 2 | March 15, 2026 |
| Winter Storm Warning | 28 | 1 | March 14, 2026 |
| Red Flag Warning | 22 | 9 | May 15, 2026 |
| Extreme Cold Warning | 21 | 1 | January 23, 2026 |
| High Wind Warning | 18 | 2 | March 12, 2026 |
| Fire Weather Watch | 15 | 4 | May 15, 2026 |
| Tornado Warning | 14 | 2 | June 10, 2026 |
| Frost Advisory | 13 | 2 | May 11, 2026 |
| Tornado Watch | 11 | 1 | June 3, 2026 |
| Freeze Warning | 10 | 2 | October 17, 2026 |
| High Wind Watch | 7 | 0 | December 18, 2025 |
| Flood Watch | 6 | 1 | July 8, 2026 |
| Ice Storm Warning | 5 | 0 | April 2, 2025 |
| Freeze Watch | 4 | 0 | October 7, 2023 |
| Extreme Heat Watch | 3 | 0 | June 20, 2025 |
| Extreme Heat Warning | 3 | 1 | July 26, 2026 |
| Extreme Cold Watch | 3 | 1 | January 23, 2026 |
| Flood Advisory | 1 | 0 | April 20, 2018 |
| Snow Squall Warning | 1 | 0 | October 30, 2023 |
| Flash Flood Warning | 1 | 0 | August 6, 2025 |
Tornado history in Grant County
22 tornadoes have been recorded in Grant County since 1950. That ranks 46 of 66 counties in South Dakota. The most recent was on May 6, 2023 (rated EF0).
Strongest tornadoes in Grant County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 28, 1955 | F2 | Grant County | 1.5 mi | 10 yd | 0 | 0 |
| May 30, 2022 | EF1 | Grant County | 10.7 mi | 40 yd | 0 | 0 |
| May 23, 1973 | F1 | Grant County | 6 mi | 100 yd | 0 | 0 |
| May 30, 2022 | EF1 | Grant County | 4.5 mi | 20 yd | 0 | 0 |
| May 12, 2022 | EF1 | Grant County | 1.3 mi | 10 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 6, 2023 | EF0 | Grant County | 0.9 mi | 10 yd | 0 | 0 |
| May 30, 2022 | EF1 | Grant County | 4.5 mi | 20 yd | 0 | 0 |
| May 30, 2022 | EF1 | Grant County | 10.7 mi | 40 yd | 0 | 0 |
| May 12, 2022 | EF1 | Grant County | 1.3 mi | 10 yd | 0 | 0 |
| May 12, 2022 | EF1 | Grant County | 0.6 mi | 20 yd | 0 | 0 |
About Grant County
- Population: 7,618 (2024 estimate)
- State: South Dakota
- NOAA Weather Radio SAME code: 046051 (how to use it)