Alert archive / Ohio / Severe Thunderstorm Watches / 2026
Severe Thunderstorm Watches in Ohio, May 2026
8 severe thunderstorm watches in May 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in May 2026. Tap one for its archive.
- Severe Thunderstorm Watches
- 8
- Busiest day
- May 18, 20262 severe thunderstorm watches
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 5:41 PM EDT | Severe Thunderstorm Watch | SPC | Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina and 3 more | 4 hr |
| May 18, 11:02 AM EDT | Severe Thunderstorm Watch | SPC | Allen, Auglaize, Defiance, Fulton, Henry, Mercer and 4 more | 7 hr |
| May 18, 3:32 PM EDT | Severe Thunderstorm Watch | SPC | Hancock, Lucas, Ottawa, Sandusky, Seneca, Wood | 3 hr |
| May 19, 2:01 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Ashland, Crawford, Defiance, Erie, Fulton and 18 more | 8 hr |
| May 19, 4:36 PM EDT | Severe Thunderstorm Watch | SPC | Auglaize, Butler, Champaign, Clark, Darke, Greene and 10 more | 5 hr |
| May 19, 8:00 PM EDT | Severe Thunderstorm Watch | SPC | Clinton, Delaware, Fairfield, Fayette, Franklin, Hocking and 3 more | 38 days |
| May 20, 3:49 PM EDT | Severe Thunderstorm Watch | SPC | Gallia, Lawrence | 5 hr |
| May 27, 1:11 PM EDT | Severe Thunderstorm Watch | SPC | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 2 more | 9 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lorain County2
- Allen County2
- Auglaize County2
- Defiance County2
- Fulton County2
- Henry County2
- Mercer County2
- Paulding County2
- Putnam County2
- Van Wert County2
- Williams County2
- Hancock County2
- Lucas County2
- Ottawa County2
- Sandusky County2
- Seneca County2
- Wood County2
- Gallia County2
- Lawrence County2
- Ashtabula County1
- Cuyahoga County1
- Geauga County1
- Lake County1
- Medina County1
- Portage County1
- Summit County1
- Trumbull County1
- Ashland County1
- Crawford County1
- Erie County1
- Huron County1
- Knox County1
- Marion County1
- Morrow County1
- Richland County1
- Wyandot County1
- Butler County1
- Champaign County1
- Clark County1
- Darke County1
25 more counties
- Greene County1
- Hamilton County1
- Hardin County1
- Logan County1
- Miami County1
- Montgomery County1
- Preble County1
- Shelby County1
- Union County1
- Warren County1
- Clinton County1
- Delaware County1
- Fairfield County1
- Fayette County1
- Franklin County1
- Hocking County1
- Licking County1
- Madison County1
- Pickaway County1
- Athens County1
- Jackson County1
- Meigs County1
- Morgan County1
- Vinton County1
- Washington County1
Nearby
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.