Alert archive / Iowa / Severe Thunderstorm Warnings / 2025
Severe Thunderstorm Warnings in Iowa, September 2025
54 severe thunderstorm warnings in September 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 September 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 54
- Busiest day
- September 16, 202518 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 |
|---|---|---|---|---|
| Sep 3, 5:56 AM CDT | Severe Thunderstorm Warning | DMX | Boone, Calhoun, Greene, Webster | 22 min |
| Sep 3, 6:43 AM CDT | Severe Thunderstorm Warning | DMX | Dallas, Greene, Guthrie | 47 min |
| Sep 14, 2:54 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 36 min |
| Sep 14, 3:07 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 24 min |
| Sep 14, 4:39 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 36 min |
| Sep 14, 5:01 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 29 min |
| Sep 16, 2:00 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Lucas | 30 min |
| Sep 16, 3:25 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Warren | 20 min |
| Sep 16, 3:36 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 24 min |
| Sep 16, 3:42 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 33 min |
| Sep 16, 3:45 PM CDT | Severe Thunderstorm Warning | DMX | Union | 30 min |
| Sep 16, 3:50 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Wright | 25 min |
| Sep 16, 3:59 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 15 min |
| Sep 16, 4:01 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt | 29 min |
| Sep 16, 4:13 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 32 min |
| Sep 16, 4:20 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 25 min |
| Sep 16, 4:26 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 34 min |
| Sep 16, 4:34 PM CDT | Severe Thunderstorm Warning | DMX | Union | 21 min |
| Sep 16, 5:16 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 29 min |
| Sep 16, 5:21 PM CDT | Severe Thunderstorm Warning | DMX | Pocahontas | 24 min |
| Sep 16, 5:35 PM CDT | Severe Thunderstorm Warning | DMX | Franklin | 25 min |
| Sep 16, 5:49 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Floyd | 41 min |
| Sep 16, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Sac | 22 min |
| Sep 16, 6:28 PM CDT | Severe Thunderstorm Warning | DMX | Bremer | 12 min |
| Sep 16, 7:57 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster | 48 min |
| Sep 16, 8:23 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 21 min |
| Sep 16, 9:23 PM CDT | Severe Thunderstorm Warning | FSD | O'Brien, Osceola | 39 min |
| Sep 17, 4:25 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold | 50 min |
| Sep 17, 4:34 PM CDT | Severe Thunderstorm Warning | DMX | Clarke | 26 min |
| Sep 17, 4:39 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 36 min |
| Sep 17, 4:55 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas, Warren, Wayne | 35 min |
| Sep 17, 5:03 PM CDT | Severe Thunderstorm Warning | DMX | Decatur, Wayne | 16 min |
| Sep 17, 5:26 PM CDT | Severe Thunderstorm Warning | DMX | Marion, Warren | 21 min |
| Sep 21, 7:35 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 40 min |
| Sep 21, 7:41 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Osceola | 49 min |
| Sep 21, 8:20 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 40 min |
| Sep 21, 8:55 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 50 min |
| Sep 22, 2:36 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 54 min |
| Sep 22, 6:26 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo | 49 min |
| Sep 22, 6:31 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Clay, O'Brien | 44 min |
| Sep 22, 7:14 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 46 min |
| Sep 22, 7:29 PM CDT | Severe Thunderstorm Warning | ARX | Clayton | 46 min |
| Sep 22, 7:40 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk | 29 min |
| Sep 22, 7:55 PM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 50 min |
| Sep 22, 7:59 PM CDT | Severe Thunderstorm Warning | DMX | Wright | 46 min |
| Sep 22, 8:22 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 38 min |
| Sep 22, 8:35 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 40 min |
| Sep 22, 9:02 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 43 min |
| Sep 22, 9:05 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Story, Webster | 40 min |
| Sep 22, 9:38 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 52 min |
| Sep 22, 10:07 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 38 min |
| Sep 22, 10:16 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 27 min |
| Sep 22, 10:23 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene | 52 min |
| Sep 22, 10:26 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 49 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Webster County7
- Monona County5
- Clarke County5
- Boone County4
- Calhoun County4
- Plymouth County4
- Black Hawk County4
- Wright County4
- Hamilton County4
- Decatur County4
- Greene County3
- Woodbury County3
- Warren County3
- Cerro Gordo County3
- O'Brien County3
- Wayne County3
- Sioux County3
- Lucas County2
- Union County2
- Humboldt County2
- Floyd County2
- Pocahontas County2
- Osceola County2
- Clay County2
- Story County2
- Harrison County2
- Dallas County1
- Guthrie County1
- Hancock County1
- Kossuth County1
- Franklin County1
- Chickasaw County1
- Sac County1
- Bremer County1
- Ringgold County1
- Marion County1
- Dickinson County1
- Allamakee County1
- Cherokee County1
- Clayton County1
2 more counties
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.