Defiance County weather alerts
There are no active weather alerts for Defiance County, OH right now.
Since 2016 the National Weather Service has issued about 664 alerts that included Defiance County, roughly 66 a year. The most common is the flood warning (134 from 2016 to 2025). The last tornado warning was issued on March 31, 2026. 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 Defiance County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Allen County, Williams County, DeKalb County, Putnam County.
Defiance County alert history
Alert events that included Defiance County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Flood Warning | 134 | 8 | April 28, 2026 |
| Severe Thunderstorm Warning | 101 | 22 | September 5, 2026 |
| Dense Fog Advisory | 72 | 9 | October 24, 2026 |
| Winter Weather Advisory | 55 | 0 | December 2, 2025 |
| Wind Advisory | 52 | 5 | June 17, 2026 |
| Severe Thunderstorm Watch | 50 | 16 | September 5, 2026 |
| Frost Advisory | 30 | 4 | October 19, 2026 |
| Heat Advisory | 28 | 7 | September 3, 2026 |
| Flood Advisory | 23 | 8 | August 10, 2026 |
| Flood Watch | 17 | 5 | August 11, 2026 |
| Freeze Warning | 16 | 3 | October 18, 2026 |
| Cold Weather Advisory | 12 | 6 | February 7, 2026 |
| Tornado Warning | 10 | 1 | March 31, 2026 |
| Tornado Watch | 8 | 2 | June 12, 2026 |
| Winter Storm Warning | 7 | 1 | January 25, 2026 |
| High Wind Watch | 7 | 1 | March 13, 2026 |
| Extreme Heat Watch | 7 | 1 | June 29, 2026 |
| Extreme Heat Warning | 7 | 1 | June 29, 2026 |
| Winter Storm Watch | 7 | 1 | January 25, 2026 |
| Freeze Watch | 6 | 3 | October 18, 2026 |
| High Wind Warning | 5 | 1 | March 13, 2026 |
| Flash Flood Warning | 3 | 0 | July 6, 2022 |
| Red Flag Warning | 2 | 0 | October 14, 2022 |
| Extreme Cold Watch | 2 | 0 | January 20, 2025 |
| Extreme Cold Warning | 2 | 0 | January 15, 2024 |
| Fire Weather Watch | 1 | 0 | April 12, 2023 |
Tornado history in Defiance County
12 tornadoes have been recorded in Defiance County since 1950, killing 4 people and injuring 17. That ranks 60 of 88 counties in Ohio. The most recent was on July 29, 2023 (rated EF1).
Strongest tornadoes in Defiance County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| November 10, 2002 | F4 | Van Wert County | 52.8 mi | 880 yd | 4 | 17 |
| August 24, 2016 | EF2 | Paulding County | 4.4 mi | 250 yd | 0 | 0 |
| July 12, 1986 | F2 | Defiance County | 3.3 mi | 73 yd | 0 | 0 |
| August 24, 2016 | EF2 | Defiance County | 2.6 mi | 400 yd | 0 | 0 |
| August 10, 1971 | F2 | Defiance County | 0.5 mi | 100 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| July 29, 2023 | EF1 | Defiance County | 0.7 mi | 100 yd | 0 | 0 |
| July 1, 2023 | EF0 | Defiance County | 0.2 mi | 20 yd | 0 | 0 |
| August 24, 2016 | EF2 | Defiance County | 2.6 mi | 400 yd | 0 | 0 |
| August 24, 2016 | EF2 | Paulding County | 4.4 mi | 250 yd | 0 | 0 |
| March 8, 2009 | EF0 | Defiance County | 5.1 mi | 50 yd | 0 | 0 |
About Defiance County
- Population: 38,644 (2024 estimate)
- State: Ohio
- NOAA Weather Radio SAME code: 039039 (how to use it)