Excessive Heat Watches in Iowa
44 excessive heat watches 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 excessive heat watches reaches back to 2005.
Excessive Heat Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Excessive Heat Watches
- 44
- Busiest year
- 20238 excessive heat watches
- Average year
- 4over 11 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.
- Fremont County12
- Harrison County12
- Mills County12
- Montgomery County12
- Page County12
- Pottawattamie County12
- Shelby County12
- Adair County10
- Adams County10
- Appanoose County10
- Boone County10
- Clarke County10
- Dallas County10
- Decatur County10
- Guthrie County10
- Jasper County10
- Lucas County10
- Madison County10
- Marion County10
- Marshall County10
- Monona County10
- Monroe County10
- Polk County10
- Ringgold County10
- Story County10
- Taylor County10
- Union County10
- Warren County10
- Wayne County10
- Audubon County9
- Calhoun County9
- Carroll County9
- Cass County9
- Crawford County9
- Greene County9
- Sac County9
- Cedar County9
- Des Moines County9
- Henry County9
- Iowa County9
59 more counties
- Jefferson County9
- Johnson County9
- Keokuk County9
- Lee County9
- Louisa County9
- Muscatine County9
- Scott County9
- Van Buren County9
- Washington County9
- Emmet County8
- Hamilton County8
- Hancock County8
- Hardin County8
- Humboldt County8
- Kossuth County8
- Palo Alto County8
- Plymouth County8
- Pocahontas County8
- Webster County8
- Winnebago County8
- Woodbury County8
- Wright County8
- Benton County8
- Buchanan County8
- Clinton County8
- Davis County8
- Delaware County8
- Dubuque County8
- Jackson County8
- Jones County8
- Linn County8
- Wapello County8
- Buena Vista County7
- Cerro Gordo County7
- Cherokee County7
- Franklin County7
- Ida County7
- Sioux County7
- Worth County7
- Mahaska County7
- Poweshiek County7
- Tama County7
- Clay County6
- O'Brien County6
- Black Hawk County6
- Bremer County6
- Butler County6
- Grundy County6
- Lyon County6
- Osceola County6
- Dickinson County5
- Allamakee County4
- Chickasaw County4
- Clayton County4
- Fayette County4
- Floyd County4
- Howard County4
- Mitchell County4
- Winneshiek County4
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.