Mellette County weather alerts
There are no active weather alerts for Mellette County, SD right now.
Since 2016 the National Weather Service has issued about 894 alerts that included Mellette County, roughly 89 a year. The most common is the severe thunderstorm warning (269 from 2016 to 2025). The last tornado warning was issued on June 29, 2026. 11 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 Mellette County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Lyman County, Todd County, Jackson County, Jones County.
Mellette County alert history
Alert events that included Mellette County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 269 | 33 | August 27, 2026 |
| Severe Thunderstorm Watch | 121 | 12 | August 27, 2026 |
| Wind Advisory | 121 | 7 | November 2, 2026 |
| Winter Weather Advisory | 68 | 2 | April 3, 2026 |
| Heat Advisory | 45 | 3 | July 29, 2026 |
| Cold Weather Advisory | 36 | 3 | January 26, 2026 |
| High Wind Warning | 32 | 3 | March 12, 2026 |
| Winter Storm Watch | 32 | 0 | March 4, 2025 |
| Dense Fog Advisory | 31 | 6 | November 6, 2026 |
| High Wind Watch | 23 | 2 | March 12, 2026 |
| Winter Storm Warning | 20 | 0 | March 4, 2025 |
| Blizzard Warning | 12 | 0 | March 25, 2024 |
| Flood Advisory | 11 | 0 | August 15, 2022 |
| Freeze Warning | 10 | 0 | October 14, 2024 |
| Tornado Watch | 10 | 3 | June 27, 2026 |
| Flood Warning | 9 | 0 | July 17, 2019 |
| Extreme Cold Warning | 9 | 0 | February 17, 2025 |
| Flood Watch | 8 | 0 | August 3, 2023 |
| Tornado Warning | 6 | 1 | June 29, 2026 |
| Flash Flood Warning | 5 | 0 | June 21, 2024 |
| Frost Advisory | 5 | 2 | May 20, 2026 |
| Freeze Watch | 4 | 0 | October 7, 2023 |
| Extreme Heat Warning | 3 | 1 | July 25, 2026 |
| Snow Squall Warning | 2 | 0 | December 15, 2021 |
| Extreme Heat Watch | 1 | 1 | July 11, 2026 |
| Extreme Cold Watch | 1 | 0 | December 20, 2022 |
Tornado history in Mellette County
11 tornadoes have been recorded in Mellette County since 1950. That ranks 63 of 66 counties in South Dakota. The most recent was on July 24, 2000 (rated F0).
Strongest tornadoes in Mellette County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 4, 1971 | F2 | Mellette County | 0.3 mi | 50 yd | 0 | 0 |
| July 4, 1973 | F1 | Mellette County | 0.5 mi | 83 yd | 0 | 0 |
| May 19, 1974 | F1 | Mellette County | 0.1 mi | 10 yd | 0 | 0 |
| September 24, 1986 | F0 | Mellette County | 1.5 mi | 60 yd | 0 | 0 |
| July 24, 2000 | F0 | Mellette County | 1 mi | 100 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 24, 2000 | F0 | Mellette County | 1 mi | 100 yd | 0 | 0 |
| July 15, 2000 | F0 | Mellette County | 0.5 mi | 10 yd | 0 | 0 |
| May 9, 1999 | F0 | Mellette County | 0.2 mi | 0 yd | 0 | 0 |
| July 1, 1998 | F0 | Mellette County | 0.1 mi | 30 yd | 0 | 0 |
| June 11, 1997 | F0 | Mellette County | 0.1 mi | 10 yd | 0 | 0 |
About Mellette County
- Population: 1,834 (2024 estimate)
- State: South Dakota
- NOAA Weather Radio SAME code: 046095 (how to use it)