Union County weather alerts
There are no active weather alerts for Union County, PA right now.
Since 2016 the National Weather Service has issued about 756 alerts that included Union County, roughly 76 a year. The most common is the severe thunderstorm warning (127 from 2016 to 2025). The last tornado warning was issued on July 2, 2023. 12 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 Northumberland County, Mifflin County, Lycoming County, Centre 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 | 127 | 20 | October 16, 2026 |
| Winter Weather Advisory | 81 | 2 | March 3, 2026 |
| Flood Advisory | 73 | 0 | September 22, 2024 |
| Severe Thunderstorm Watch | 66 | 14 | October 16, 2026 |
| Dense Fog Advisory | 53 | 7 | November 6, 2026 |
| Flood Watch | 53 | 5 | September 3, 2026 |
| Wind Advisory | 49 | 3 | March 16, 2026 |
| Flood Warning | 37 | 4 | September 3, 2026 |
| Frost Advisory | 29 | 5 | October 7, 2026 |
| Snow Squall Warning | 26 | 3 | January 19, 2026 |
| Freeze Warning | 22 | 4 | October 18, 2026 |
| Heat Advisory | 18 | 2 | July 14, 2026 |
| Tornado Watch | 18 | 3 | June 14, 2026 |
| Freeze Watch | 17 | 3 | October 18, 2026 |
| Flash Flood Warning | 16 | 3 | September 3, 2026 |
| Winter Storm Watch | 15 | 2 | February 22, 2026 |
| Winter Storm Warning | 14 | 2 | February 22, 2026 |
| Red Flag Warning | 9 | 0 | November 8, 2024 |
| Fire Weather Watch | 8 | 0 | November 8, 2024 |
| Cold Weather Advisory | 7 | 9 | February 9, 2026 |
| Tornado Warning | 4 | 0 | July 2, 2023 |
| High Wind Watch | 4 | 0 | November 5, 2025 |
| High Wind Warning | 3 | 0 | February 16, 2025 |
| Extreme Heat Warning | 3 | 1 | July 1, 2026 |
| Extreme Heat Watch | 2 | 1 | July 1, 2026 |
| Ice Storm Warning | 2 | 0 | January 9, 2022 |
| Extreme Cold Watch | 0 | 1 | February 7, 2026 |
| Extreme Cold Warning | 0 | 1 | February 7, 2026 |
Tornado history in Union County
12 tornadoes have been recorded in Union County since 1950, killing 6 people and injuring 60. That ranks 40 of 67 counties in Pennsylvania. The most recent was on July 2, 2023 (rated EF1).
Strongest tornadoes in Union County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 31, 1985 | F3 | Lycoming County | 19 mi | 910 yd | 6 | 60 |
| September 27, 1998 | F1 | Union County | 2.5 mi | 400 yd | 0 | 0 |
| September 4, 2001 | F1 | Union County | 2.5 mi | 300 yd | 0 | 0 |
| July 2, 2023 | EF1 | Union County | 2.4 mi | 150 yd | 0 | 0 |
| July 2, 2023 | EF1 | Union County | 2.1 mi | 50 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 2, 2023 | EF1 | Union County | 2.4 mi | 150 yd | 0 | 0 |
| July 2, 2023 | EF1 | Union County | 2.1 mi | 50 yd | 0 | 0 |
| July 2, 2023 | EF1 | Union County | 1.5 mi | 150 yd | 0 | 0 |
| April 14, 2019 | EF1 | Union County | 1.5 mi | 150 yd | 0 | 0 |
| August 20, 2015 | EF1 | Union County | 0.2 mi | 100 yd | 0 | 0 |
About Union County
- Population: 42,159 (2024 estimate)
- State: Pennsylvania
- NOAA Weather Radio SAME code: 042119 (how to use it)