Day County weather alerts
There are no active weather alerts for Day County, SD right now.
Since 2016 the National Weather Service has issued about 971 alerts that included Day County, roughly 97 a year. The most common is the severe thunderstorm warning (176 from 2016 to 2025). The last tornado warning was issued on June 29, 2026. 33 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 Day County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Clark County, Marshall County, Codington County, Spink County.
Day County alert history
Alert events that included Day County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 176 | 23 | August 30, 2026 |
| Winter Weather Advisory | 128 | 9 | April 1, 2026 |
| Wind Advisory | 115 | 5 | June 29, 2026 |
| Dense Fog Advisory | 98 | 11 | October 12, 2026 |
| Cold Weather Advisory | 79 | 4 | January 25, 2026 |
| Severe Thunderstorm Watch | 72 | 8 | August 24, 2026 |
| Winter Storm Watch | 40 | 2 | April 3, 2026 |
| Blizzard Warning | 29 | 3 | March 15, 2026 |
| Extreme Cold Warning | 26 | 1 | January 23, 2026 |
| Tornado Warning | 25 | 4 | June 29, 2026 |
| Red Flag Warning | 23 | 8 | May 15, 2026 |
| Winter Storm Warning | 22 | 2 | April 3, 2026 |
| Heat Advisory | 20 | 4 | July 29, 2026 |
| High Wind Warning | 19 | 2 | June 29, 2026 |
| Fire Weather Watch | 19 | 3 | May 15, 2026 |
| Frost Advisory | 15 | 3 | October 17, 2026 |
| Flood Warning | 13 | 6 | July 31, 2026 |
| Freeze Warning | 12 | 1 | May 20, 2026 |
| High Wind Watch | 8 | 0 | March 10, 2025 |
| Tornado Watch | 6 | 1 | June 3, 2026 |
| Freeze Watch | 5 | 0 | October 7, 2023 |
| Ice Storm Warning | 4 | 0 | December 25, 2023 |
| Flood Watch | 4 | 1 | July 8, 2026 |
| Snow Squall Warning | 4 | 0 | October 30, 2023 |
| Extreme Heat Watch | 3 | 0 | June 20, 2025 |
| Extreme Cold Watch | 3 | 1 | January 23, 2026 |
| Extreme Heat Warning | 2 | 1 | July 26, 2026 |
| Flash Flood Warning | 1 | 3 | July 30, 2026 |
Tornado history in Day County
33 tornadoes have been recorded in Day County since 1950, injuring 1 people. That ranks 23 of 66 counties in South Dakota. The most recent was on May 12, 2022 (rated EF1).
Strongest tornadoes in Day County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 15, 1953 | F2 | Day County | 7.6 mi | 10 yd | 0 | 0 |
| July 17, 1996 | F2 | Day County | 5 mi | 150 yd | 0 | 0 |
| June 24, 1966 | F1 | Brown County | 5.9 mi | 10 yd | 0 | 0 |
| July 17, 1996 | F1 | Day County | 3 mi | 50 yd | 0 | 0 |
| September 9, 2019 | EF1 | Day County | 1.6 mi | 80 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 12, 2022 | EF1 | Day County | 0.1 mi | 35 yd | 0 | 0 |
| October 9, 2021 | EF0 | Day County | 0 mi | 10 yd | 0 | 0 |
| August 22, 2021 | EF0 | Day County | 0 mi | 10 yd | 0 | 0 |
| September 9, 2019 | EF0 | Day County | 0.2 mi | 10 yd | 0 | 0 |
| September 9, 2019 | EF1 | Day County | 1.6 mi | 80 yd | 0 | 0 |
About Day County
- Population: 5,408 (2024 estimate)
- State: South Dakota
- NOAA Weather Radio SAME code: 046037 (how to use it)