Alert archive / Iowa / Severe Thunderstorm Warnings / 2025
Severe Thunderstorm Warnings in Iowa, August 2025
55 severe thunderstorm warnings in August 2025. 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 warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 55
- Busiest day
- August 9, 202523 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 3:23 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Poweshiek | 37 min |
| Aug 7, 8:52 AM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 38 min |
| Aug 9, 3:21 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 39 min |
| Aug 9, 3:59 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 26 min |
| Aug 9, 4:10 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida | 50 min |
| Aug 9, 5:29 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Pottawattamie | 46 min |
| Aug 9, 5:44 AM CDT | Severe Thunderstorm Warning | FSD | Ida | 16 min |
| Aug 9, 5:57 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery | 33 min |
| Aug 9, 6:04 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Monona, Pottawattamie, Shelby | 41 min |
| Aug 9, 6:10 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Crawford, Sac | 50 min |
| Aug 9, 6:17 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 43 min |
| Aug 9, 6:20 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 40 min |
| Aug 9, 6:40 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona, Pottawattamie, Shelby | 50 min |
| Aug 9, 6:44 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 46 min |
| Aug 9, 6:47 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford | 58 min |
| Aug 9, 6:59 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Sac | 46 min |
| Aug 9, 6:59 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 46 min |
| Aug 9, 7:05 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford, Greene | 40 min |
| Aug 9, 7:06 AM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 54 min |
| Aug 9, 7:10 AM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 50 min |
| Aug 9, 7:32 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 43 min |
| Aug 9, 7:37 AM CDT | Severe Thunderstorm Warning | DMX | Audubon, Boone, Carroll, Greene, Guthrie | 38 min |
| Aug 9, 7:47 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Greene | 25 min |
| Aug 9, 7:58 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Hamilton, Webster | 47 min |
| Aug 9, 8:10 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Humboldt, Pocahontas, Webster, Wright | 50 min |
| Aug 10, 2:41 AM CDT | Severe Thunderstorm Warning | OAX | Mills | 39 min |
| Aug 10, 3:10 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 65 min |
| Aug 10, 3:42 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 33 min |
| Aug 10, 3:48 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Taylor | 42 min |
| Aug 10, 4:17 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Audubon, Cass, Dallas, Guthrie and 1 more | 43 min |
| Aug 10, 4:57 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Guthrie, Madison, Polk | 36 min |
| Aug 10, 5:47 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 31 min |
| Aug 15, 11:31 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien | 59 min |
| Aug 15, 12:00 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida | 45 min |
| Aug 15, 12:21 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 39 min |
| Aug 15, 12:50 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Hamilton, Hancock, Humboldt, Kossuth, Palo Alto and 5 more | 40 min |
| Aug 15, 12:57 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida, Woodbury | 48 min |
| Aug 15, 2:00 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Franklin, Hancock, Wright | 45 min |
| Aug 15, 2:27 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 33 min |
| Aug 15, 2:29 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 46 min |
| Aug 15, 2:32 PM CDT | Severe Thunderstorm Warning | DMX | Butler | 28 min |
| Aug 15, 2:59 PM CDT | Severe Thunderstorm Warning | DMX | Bremer, Butler | 61 min |
| Aug 15, 3:04 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 56 min |
| Aug 15, 3:36 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin, Grundy, Hamilton, Hardin, Marshall and 2 more | 39 min |
| Aug 15, 4:15 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Marshall, Tama | 45 min |
| Aug 15, 4:45 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Linn | 60 min |
| Aug 15, 4:54 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Marshall, Poweshiek, Tama | 51 min |
| Aug 15, 5:22 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Delaware, Iowa, Johnson, Linn | 53 min |
| Aug 15, 5:44 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Cedar, Delaware, Johnson, Jones, Linn | 61 min |
| Aug 15, 6:13 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jackson, Johnson, Jones, Linn and 2 more | 62 min |
| Aug 16, 1:03 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Fayette, Winneshiek | 42 min |
| Aug 16, 7:30 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 60 min |
| Aug 17, 9:26 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones, Scott | 64 min |
| Aug 17, 9:57 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Scott | 44 min |
| Aug 18, 6:20 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Lee | 55 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mills County8
- Pottawattamie County7
- Cherokee County6
- Calhoun County6
- Ida County5
- Montgomery County5
- Sac County5
- Greene County5
- Buena Vista County4
- Crawford County4
- Carroll County4
- Webster County4
- Wright County4
- Linn County4
- Harrison County3
- Fremont County3
- Monona County3
- Shelby County3
- Audubon County3
- Boone County3
- Guthrie County3
- Hamilton County3
- Pocahontas County3
- Butler County3
- Grundy County3
- Marshall County3
- Benton County3
- Johnson County3
- Cedar County3
- Jones County3
- Clinton County3
- Scott County3
- Poweshiek County2
- Page County2
- Woodbury County2
- Humboldt County2
- Adair County2
- Adams County2
- Cass County2
- Dallas County2
32 more counties
- Madison County2
- Dubuque County2
- Hancock County2
- Cerro Gordo County2
- Franklin County2
- Hardin County2
- Tama County2
- Buchanan County2
- Delaware County2
- Jasper County1
- Decatur County1
- Wayne County1
- Taylor County1
- Polk County1
- Clay County1
- O'Brien County1
- Kossuth County1
- Palo Alto County1
- Winnebago County1
- Floyd County1
- Bremer County1
- Chickasaw County1
- Story County1
- Black Hawk County1
- Iowa County1
- Jackson County1
- Muscatine County1
- Allamakee County1
- Fayette County1
- Winneshiek County1
- Des Moines County1
- Lee County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.