Alert archive / Ohio / Heat Advisories
Heat Advisories in Ohio, 2026
26 heat advisories in 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 heat advisories reaches back to 2005.
Heat Advisories by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Heat Advisories
- 26
- Busiest month
- June10 heat advisories
- Busiest day
- July 14, 20264 heat advisories
Over time
By month
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 |
|---|---|---|---|---|
| Jun 9, 1:53 PM EDT | Heat Advisory | CLE | Ashland, Crawford, Cuyahoga, Erie, Hancock, Huron and 12 more | 30 hr |
| Jun 9, 2:08 PM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 30 hr |
| Jun 10, 2:31 AM EDT | Heat Advisory | ILN | Auglaize, Hardin, Mercer | 17 hr |
| Jun 11, 1:48 AM EDT | Heat Advisory | ILN | Auglaize, Hardin, Mercer | 16 hr |
| Jun 11, 1:49 AM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 16 hr |
| Jun 11, 2:27 AM EDT | Heat Advisory | CLE | Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more | 13 hr |
| Jun 28, 1:01 PM EDT | Heat Advisory | CLE | Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more | 5 days |
| Jun 28, 1:48 PM EDT | Heat Advisory | ILN | Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more | 35 hr |
| Jun 29, 12:34 PM EDT | Heat Advisory | RLX | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more | 5 days |
| Jun 29, 12:53 PM EDT | Heat Advisory | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more | 5 days |
| Jul 2, 11:33 AM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 55 hr |
| Jul 3, 12:02 AM EDT | Heat Advisory | ILN | Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more | 44 hr |
| Jul 3, 8:05 PM EDT | Heat Advisory | CLE | Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more | 22 hr |
| Jul 13, 12:57 PM EDT | Heat Advisory | IWX | Defiance, Fulton, Henry, Paulding, Putnam, Williams | 31 hr |
| Jul 13, 1:01 PM EDT | Heat Advisory | CLE | Cuyahoga, Erie, Hancock, Huron, Lorain, Lucas and 4 more | 31 hr |
| Jul 14, 12:45 PM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 31 hr |
| Jul 14, 12:45 PM EDT | Heat Advisory | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more | 31 hr |
| Jul 14, 12:50 PM EDT | Heat Advisory | ILN | Auglaize, Champaign, Clark, Darke, Delaware, Franklin and 11 more | 31 hr |
| Jul 14, 12:56 PM EDT | Heat Advisory | CLE | Ashland, Crawford, Cuyahoga, Erie, Hancock, Holmes and 19 more | 31 hr |
| Aug 31, 1:00 PM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 4 days |
| Aug 31, 1:24 PM EDT | Heat Advisory | CLE | Ashland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more | 55 hr |
| Aug 31, 2:03 PM EDT | Heat Advisory | ILN | Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more | 4 days |
| Sep 1, 1:23 AM EDT | Heat Advisory | RLX | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more | 4 days |
| Sep 1, 12:59 PM EDT | Heat Advisory | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more | 55 hr |
| Sep 3, 12:58 AM EDT | Heat Advisory | CLE | Ashland, Crawford, Hancock, Holmes, Huron, Knox and 10 more | 18 hr |
| Sep 3, 1:41 AM EDT | Heat Advisory | IWX | Defiance, Fulton, Henry, Williams | 18 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Hancock County8
- Huron County8
- Lucas County8
- Ottawa County8
- Sandusky County8
- Seneca County8
- Wood County8
- Ashland County7
- Crawford County7
- Cuyahoga County7
- Erie County7
- Knox County7
- Lorain County7
- Marion County7
- Morrow County7
- Richland County7
- Wyandot County7
- Defiance County7
- Fulton County7
- Henry County7
- Williams County7
- Medina County6
- Paulding County6
- Putnam County6
- Auglaize County6
- Hardin County6
- Mercer County6
- Holmes County6
- Wayne County6
- Allen County5
- Van Wert County5
- Mahoning County5
- Portage County5
- Stark County5
- Summit County5
- Trumbull County5
- Ashtabula County4
- Geauga County4
- Lake County4
- Champaign County4
48 more counties
- Clark County4
- Darke County4
- Delaware County4
- Franklin County4
- Greene County4
- Licking County4
- Logan County4
- Madison County4
- Miami County4
- Montgomery County4
- Preble County4
- Shelby County4
- Union County4
- Adams County3
- Brown County3
- Butler County3
- Clermont County3
- Clinton County3
- Fairfield County3
- Fayette County3
- Hamilton County3
- Highland County3
- Hocking County3
- Pickaway County3
- Pike County3
- Ross County3
- Scioto County3
- Warren County3
- Belmont County3
- Carroll County3
- Columbiana County3
- Coshocton County3
- Guernsey County3
- Harrison County3
- Jefferson County3
- Monroe County3
- Muskingum County3
- Noble County3
- Tuscarawas County3
- Athens County2
- Gallia County2
- Jackson County2
- Lawrence County2
- Meigs County2
- Morgan County2
- Perry County2
- Vinton County2
- Washington County2
The busiest days
Days with the most alerts issued, by UTC date.
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.