Delaware County weather alerts
There are no active weather alerts for Delaware County, OH right now.
Since 2016 the National Weather Service has issued about 796 alerts that included Delaware County, roughly 80 a year. The most common is the flood advisory (132 from 2016 to 2025). The last tornado warning was issued on June 6, 2024. 15 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 Delaware County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Knox County, Marion County, Licking County, Union County.
Delaware County alert history
Alert events that included Delaware County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Flood Advisory | 132 | 16 | September 21, 2026 |
| Severe Thunderstorm Warning | 123 | 29 | September 10, 2026 |
| Winter Weather Advisory | 74 | 2 | February 23, 2026 |
| Wind Advisory | 67 | 3 | March 15, 2026 |
| Dense Fog Advisory | 62 | 8 | October 21, 2026 |
| Severe Thunderstorm Watch | 44 | 15 | September 5, 2026 |
| Freeze Warning | 39 | 5 | October 18, 2026 |
| Flood Watch | 37 | 6 | September 20, 2026 |
| Frost Advisory | 34 | 4 | October 19, 2026 |
| Flood Warning | 24 | 3 | August 20, 2026 |
| Cold Weather Advisory | 24 | 8 | February 7, 2026 |
| Tornado Watch | 21 | 2 | March 26, 2026 |
| Heat Advisory | 19 | 4 | September 1, 2026 |
| Flash Flood Warning | 17 | 3 | August 19, 2026 |
| Freeze Watch | 17 | 4 | October 18, 2026 |
| Tornado Warning | 16 | 0 | June 6, 2024 |
| High Wind Warning | 11 | 1 | March 13, 2026 |
| Winter Storm Watch | 6 | 1 | January 24, 2026 |
| Extreme Heat Watch | 6 | 0 | June 22, 2025 |
| Winter Storm Warning | 5 | 1 | January 24, 2026 |
| Red Flag Warning | 4 | 0 | April 20, 2023 |
| High Wind Watch | 4 | 1 | March 13, 2026 |
| Extreme Cold Watch | 3 | 1 | January 26, 2026 |
| Extreme Heat Warning | 2 | 1 | June 30, 2026 |
| Extreme Cold Warning | 2 | 3 | January 31, 2026 |
| Snow Squall Warning | 2 | 0 | January 19, 2025 |
| Fire Weather Watch | 1 | 0 | May 1, 2018 |
Tornado history in Delaware County
15 tornadoes have been recorded in Delaware County since 1950, killing 4 people and injuring 65. That ranks 51 of 88 counties in Ohio. The most recent was on June 5, 2024 (rated EF0).
Strongest tornadoes in Delaware County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| April 11, 1965 | F2 | Union County | 22.2 mi | 400 yd | 4 | 62 |
| September 20, 2000 | F2 | Delaware County | 21 mi | 100 yd | 0 | 2 |
| March 14, 2024 | EF2 | Union County | 19.5 mi | 600 yd | 0 | 0 |
| May 8, 1973 | F2 | Franklin County | 17.3 mi | 67 yd | 0 | 0 |
| March 14, 2024 | EF1 | Delaware County | 35.4 mi | 600 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 5, 2024 | EF0 | Delaware County | 0.3 mi | 50 yd | 0 | 0 |
| April 17, 2024 | EF1 | Delaware County | 0.9 mi | 100 yd | 0 | 0 |
| March 14, 2024 | EF1 | Delaware County | 35.4 mi | 600 yd | 0 | 0 |
| March 14, 2024 | EF2 | Union County | 19.5 mi | 600 yd | 0 | 0 |
| September 7, 2020 | EF0 | Delaware County | 3.2 mi | 150 yd | 0 | 0 |
About Delaware County
- Population: 237,966 (2024 estimate)
- State: Ohio
- NOAA Weather Radio SAME code: 039041 (how to use it)