Heat Advisories in Iowa
496 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
- 496
- Busiest year
- 202441 heat advisories
- Average year
- 23over 22 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.
- Lee County110
- Des Moines County107
- Van Buren County107
- Henry County105
- Jefferson County103
- Washington County95
- Keokuk County94
- Louisa County94
- Fremont County94
- Mills County92
- Page County91
- Montgomery County87
- Pottawattamie County87
- Muscatine County86
- Scott County85
- Appanoose County84
- Davis County84
- Monroe County84
- Wayne County84
- Decatur County83
- Clarke County82
- Ringgold County82
- Union County82
- Wapello County82
- Woodbury County82
- Johnson County81
- Lucas County81
- Taylor County81
- Warren County81
- Adams County80
- Iowa County79
- Madison County79
- Plymouth County79
- Cass County78
- Cedar County78
- Dallas County78
- Polk County78
- Adair County77
- Marion County77
- Mahaska County75
59 more counties
- Sioux County75
- Harrison County73
- Cherokee County72
- Ida County71
- Benton County70
- Clinton County70
- Buena Vista County70
- Linn County69
- Audubon County68
- Guthrie County68
- Jasper County67
- O'Brien County67
- Lyon County66
- Poweshiek County65
- Shelby County65
- Jones County64
- Monona County64
- Jackson County62
- Story County61
- Clay County61
- Boone County60
- Osceola County60
- Carroll County59
- Crawford County59
- Greene County59
- Clayton County57
- Sac County56
- Buchanan County56
- Calhoun County55
- Fayette County55
- Pocahontas County55
- Delaware County55
- Dickinson County55
- Marshall County54
- Tama County54
- Webster County54
- Humboldt County53
- Dubuque County53
- Allamakee County50
- Chickasaw County50
- Floyd County50
- Hamilton County49
- Hardin County49
- Winneshiek County49
- Mitchell County48
- Palo Alto County48
- Wright County48
- Emmet County47
- Howard County47
- Grundy County46
- Black Hawk County45
- Kossuth County45
- Franklin County44
- Bremer County42
- Butler County42
- Hancock County42
- Winnebago County42
- Cerro Gordo County40
- Worth County40
The latest heat advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 7, 11:34 AM CDT | Heat Advisory | OAX | Fremont, Mills, Montgomery, Page | 31 hr |
| Sep 4, 7:42 AM CDT | Heat Advisory | FSD | Buena Vista, Cherokee, Ida, O'Brien, Plymouth, Sioux and 1 more | 10 hr |
| Sep 4, 2:49 AM CDT | Heat Advisory | ARX | Clayton, Fayette | 16 hr |
| Sep 1, 11:04 AM CDT | Heat Advisory | OAX | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 4 days |
| Aug 30, 1:32 PM CDT | Heat Advisory | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 32 more | 6 days |
| Aug 30, 1:04 PM CDT | Heat Advisory | DVN | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 6 days |
| Aug 12, 1:18 AM CDT | Heat Advisory | DVN | Des Moines, Henry, Jefferson, Lee, Van Buren | 12 hr |
| Aug 10, 1:57 PM CDT | Heat Advisory | DVN | Des Moines, Henry, Jefferson, Keokuk, Lee, Louisa and 2 more | 30 hr |
| Aug 9, 1:41 AM CDT | Heat Advisory | DVN | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 7 more | 18 hr |
| Jul 26, 12:39 PM CDT | Heat Advisory | FSD | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 31 hr |
| Jul 26, 11:50 AM CDT | Heat Advisory | DMX | Cerro Gordo, Crawford, Emmet, Franklin, Hancock, Humboldt and 7 more | 34 hr |
| Jul 25, 4:54 PM CDT | Heat Advisory | OAX | Harrison, Monona, Shelby | 53 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. Warning verification from the Mesonet's Cow. Rebuilt daily.