Heat Advisories in Ohio
345 heat advisories since 1986. 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 since 1986. Tap one for its archive.
- Heat Advisories
- 345
- Busiest year
- 201250 heat advisories
- Average year
- 17over 20 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lawrence County80
- Gallia County79
- Butler County76
- Clermont County75
- Adams County73
- Brown County73
- Scioto County72
- Highland County70
- Pike County70
- Warren County70
- Allen County66
- Jackson County66
- Paulding County66
- Putnam County66
- Van Wert County66
- Clinton County65
- Preble County64
- Ross County64
- Defiance County62
- Meigs County62
- Henry County61
- Hamilton County60
- Greene County59
- Vinton County58
- Fayette County57
- Fulton County57
- Williams County57
- Pickaway County55
- Athens County53
- Hocking County53
- Washington County53
- Wood County53
- Fairfield County52
- Franklin County52
- Hancock County52
- Clark County51
- Darke County51
- Lucas County51
- Madison County51
- Morgan County51
48 more counties
- Sandusky County51
- Seneca County51
- Mercer County50
- Ottawa County50
- Perry County50
- Auglaize County49
- Miami County49
- Montgomery County49
- Champaign County48
- Licking County47
- Wyandot County47
- Hardin County46
- Shelby County46
- Crawford County45
- Delaware County45
- Logan County45
- Marion County45
- Huron County44
- Morrow County44
- Union County43
- Erie County42
- Knox County41
- Ashland County39
- Cuyahoga County39
- Richland County39
- Lorain County38
- Monroe County38
- Belmont County37
- Coshocton County37
- Holmes County37
- Muskingum County37
- Noble County37
- Guernsey County36
- Wayne County36
- Medina County34
- Stark County33
- Tuscarawas County33
- Harrison County32
- Portage County32
- Summit County32
- Carroll County31
- Mahoning County30
- Jefferson County29
- Trumbull County29
- Columbiana County28
- Geauga County26
- Ashtabula County24
- Lake County22
The latest heat advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 1:41 AM EDT | Heat Advisory | IWX | Defiance, Fulton, Henry, Williams | 18 hr |
| Sep 3, 12:58 AM EDT | Heat Advisory | CLE | Ashland, Crawford, Hancock, Holmes, Huron, Knox and 10 more | 18 hr |
| Sep 1, 12:59 PM EDT | Heat Advisory | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more | 55 hr |
| Sep 1, 1:23 AM EDT | Heat Advisory | RLX | Athens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more | 4 days |
| Aug 31, 2:03 PM EDT | Heat Advisory | ILN | Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 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, 1:00 PM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 4 days |
| Jul 14, 12:56 PM EDT | Heat Advisory | CLE | Ashland, Crawford, Cuyahoga, Erie, Hancock, Holmes and 19 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, 12:45 PM EDT | Heat Advisory | PBZ | Belmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more | 31 hr |
| Jul 14, 12:45 PM EDT | Heat Advisory | IWX | Allen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more | 31 hr |
| Jul 13, 1:01 PM EDT | Heat Advisory | CLE | Cuyahoga, Erie, Hancock, Huron, Lorain, Lucas and 4 more | 31 hr |
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. Rebuilt daily.