Union County weather alerts
There are no active weather alerts for Union County, SC right now.
Since 2016 the National Weather Service has issued about 625 alerts that included Union County, roughly 63 a year. The most common is the severe thunderstorm warning (217 from 2016 to 2025). The last tornado warning was issued on March 16, 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 Union County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Chester County, York County, Laurens County, Fairfield County.
Union County alert history
Alert events that included Union County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 217 | 23 | September 20, 2026 |
| Dense Fog Advisory | 81 | 3 | January 7, 2026 |
| Severe Thunderstorm Watch | 40 | 6 | September 6, 2026 |
| Wind Advisory | 31 | 0 | March 15, 2025 |
| Tornado Watch | 28 | 1 | March 12, 2026 |
| Flood Advisory | 26 | 2 | September 23, 2026 |
| Freeze Warning | 26 | 0 | November 11, 2025 |
| Flood Watch | 25 | 0 | September 25, 2024 |
| Tornado Warning | 25 | 1 | March 16, 2026 |
| Frost Advisory | 24 | 0 | November 1, 2025 |
| Heat Advisory | 22 | 8 | September 5, 2026 |
| Freeze Watch | 21 | 0 | November 11, 2025 |
| Flood Warning | 15 | 0 | February 15, 2025 |
| Winter Weather Advisory | 7 | 1 | January 26, 2026 |
| Flash Flood Warning | 6 | 1 | August 13, 2026 |
| Red Flag Warning | 6 | 1 | March 28, 2026 |
| Winter Storm Watch | 5 | 2 | January 30, 2026 |
| Winter Storm Warning | 5 | 1 | January 30, 2026 |
| Fire Weather Watch | 4 | 1 | March 28, 2026 |
| Cold Weather Advisory | 3 | 2 | February 1, 2026 |
| High Wind Warning | 2 | 0 | September 11, 2017 |
| Tropical Storm Watch | 2 | 0 | September 25, 2024 |
| Tropical Storm Warning | 2 | 0 | September 25, 2024 |
| High Wind Watch | 1 | 0 | September 11, 2017 |
| Ice Storm Warning | 1 | 1 | January 24, 2026 |
| Extreme Cold Watch | 0 | 1 | February 1, 2026 |
| Extreme Cold Warning | 0 | 1 | February 1, 2026 |
Tornado history in Union County
22 tornadoes have been recorded in Union County since 1950, killing 1 people and injuring 5. That ranks 28 of 46 counties in South Carolina. The most recent was on December 29, 2024 (rated EF0).
Strongest tornadoes in Union County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| August 16, 1994 | F3 | Union County | 30 mi | 250 yd | 0 | 0 |
| April 8, 1957 | F2 | Union County | 15.2 mi | 100 yd | 0 | 2 |
| August 16, 1994 | F2 | Union County | 10 mi | 150 yd | 0 | 1 |
| April 15, 1993 | F2 | Union County | 6 mi | 600 yd | 0 | 2 |
| April 3, 2017 | EF1 | Union County | 0.7 mi | 150 yd | 1 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| December 29, 2024 | EF0 | Union County | 2.2 mi | 25 yd | 0 | 0 |
| December 29, 2024 | EF0 | Union County | 7 mi | 50 yd | 0 | 0 |
| December 29, 2024 | EF0 | Union County | 2.2 mi | 30 yd | 0 | 0 |
| October 8, 2017 | EF0 | Union County | 0.2 mi | 200 yd | 0 | 0 |
| April 3, 2017 | EF0 | Union County | 0 mi | 50 yd | 0 | 0 |
About Union County
- Population: 26,678 (2024 estimate)
- State: South Carolina
- NOAA Weather Radio SAME code: 045087 (how to use it)