Seneca County weather alerts
There are no active weather alerts for Seneca County, OH right now.
Since 2016 the National Weather Service has issued about 647 alerts that included Seneca County, roughly 65 a year. The most common is the severe thunderstorm warning (173 from 2016 to 2025). The last tornado warning was issued on June 18, 2026. 24 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 Seneca County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Crawford County, Hancock County, Sandusky County, Huron County.
Seneca County alert history
Alert events that included Seneca County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Severe Thunderstorm Warning | 173 | 37 | September 3, 2026 |
| Wind Advisory | 66 | 4 | April 28, 2026 |
| Winter Weather Advisory | 52 | 2 | February 6, 2026 |
| Severe Thunderstorm Watch | 50 | 15 | September 9, 2026 |
| Flood Advisory | 48 | 4 | July 10, 2026 |
| Dense Fog Advisory | 44 | 8 | October 24, 2026 |
| Flood Watch | 24 | 5 | August 15, 2026 |
| Flood Warning | 24 | 4 | May 25, 2026 |
| Frost Advisory | 23 | 4 | October 19, 2026 |
| Cold Weather Advisory | 22 | 6 | February 7, 2026 |
| Heat Advisory | 21 | 8 | September 3, 2026 |
| Freeze Warning | 20 | 3 | October 18, 2026 |
| High Wind Warning | 13 | 1 | March 13, 2026 |
| Tornado Watch | 11 | 2 | March 26, 2026 |
| Tornado Warning | 11 | 2 | June 18, 2026 |
| Flash Flood Warning | 9 | 0 | July 16, 2025 |
| Freeze Watch | 8 | 3 | October 18, 2026 |
| High Wind Watch | 5 | 1 | March 13, 2026 |
| Extreme Heat Watch | 4 | 0 | June 22, 2025 |
| Winter Storm Watch | 4 | 1 | January 25, 2026 |
| Winter Storm Warning | 4 | 1 | January 25, 2026 |
| Extreme Cold Warning | 3 | 1 | January 27, 2026 |
| Red Flag Warning | 2 | 0 | November 19, 2020 |
| Extreme Cold Watch | 2 | 1 | January 27, 2026 |
| Fire Weather Watch | 1 | 0 | May 1, 2018 |
| Extreme Heat Warning | 1 | 1 | June 30, 2026 |
| Snow Squall Warning | 1 | 1 | January 27, 2026 |
| Ice Storm Warning | 1 | 0 | February 12, 2025 |
Tornado history in Seneca County
24 tornadoes have been recorded in Seneca County since 1950, killing 11 people and injuring 138. That ranks 21 of 88 counties in Ohio. The most recent was on March 14, 2024 (rated unknown).
Strongest tornadoes in Seneca County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 10, 1973 | F3 | Seneca County | 50.1 mi | 27 yd | 6 | 100 |
| April 11, 1965 | F3 | Seneca County | 15 mi | 300 yd | 4 | 30 |
| November 10, 2002 | F3 | Seneca County | 21 mi | 100 yd | 1 | 2 |
| July 13, 1992 | F2 | Seneca County | 16 mi | 100 yd | 0 | 0 |
| November 10, 2002 | F2 | Hancock County | 9 mi | 50 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| March 14, 2024 | ? | Hancock County | 1.3 mi | 50 yd | 0 | 0 |
| November 5, 2017 | EF1 | Seneca County | 0.4 mi | 180 yd | 0 | 0 |
| November 5, 2017 | EF2 | Seneca County | 0.6 mi | 150 yd | 0 | 0 |
| July 10, 2013 | EF0 | Seneca County | 10.2 mi | 50 yd | 0 | 0 |
| July 8, 2013 | EF0 | Seneca County | 0.1 mi | 15 yd | 0 | 0 |
About Seneca County
- Population: 54,730 (2024 estimate)
- State: Ohio
- NOAA Weather Radio SAME code: 039147 (how to use it)