Alert archive / Iowa / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Iowa, July 2026
116 severe thunderstorm warnings in July 2026. 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 July 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 116
- Busiest day
- July 20, 202627 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 |
|---|---|---|---|---|
| Jun 30, 10:49 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery | 26 min |
| Jul 1, 2:05 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 25 min |
| Jul 1, 2:24 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Plymouth, Sioux | 51 min |
| Jul 1, 2:42 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 33 min |
| Jul 1, 3:06 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 39 min |
| Jul 1, 3:40 AM CDT | Severe Thunderstorm Warning | FSD | Lyon | 65 min |
| Jul 1, 4:47 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 26 min |
| Jul 1, 9:08 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 41 min |
| Jul 1, 7:32 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 43 min |
| Jul 1, 8:34 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Ida | 30 min |
| Jul 2, 4:38 AM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 15 min |
| Jul 2, 7:26 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 21 min |
| Jul 2, 8:48 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 42 min |
| Jul 2, 11:44 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Worth | 61 min |
| Jul 2, 12:31 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 59 min |
| Jul 2, 1:08 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette, Howard, Winneshiek | 67 min |
| Jul 2, 1:29 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer | 46 min |
| Jul 2, 3:13 PM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 62 min |
| Jul 2, 3:26 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 49 min |
| Jul 2, 3:57 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 63 min |
| Jul 2, 4:00 PM CDT | Severe Thunderstorm Warning | DMX | Webster | 45 min |
| Jul 2, 4:03 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Pocahontas, Webster | 43 min |
| Jul 2, 4:06 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque | 16 min |
| Jul 2, 4:13 PM CDT | Severe Thunderstorm Warning | DMX | Hardin, Marshall, Story | 47 min |
| Jul 2, 4:17 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Polk | 58 min |
| Jul 2, 4:32 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 58 min |
| Jul 2, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Webster, Wright | 45 min |
| Jul 2, 4:54 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story | 25 min |
| Jul 2, 4:58 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Grundy, Hardin, Marshall | 29 min |
| Jul 2, 5:10 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Webster | 50 min |
| Jul 2, 5:15 PM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin | 45 min |
| Jul 2, 5:16 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Polk, Story | 44 min |
| Jul 2, 5:58 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Polk, Story | 32 min |
| Jul 2, 7:40 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 50 min |
| Jul 2, 10:00 PM CDT | Severe Thunderstorm Warning | DMX | Polk, Story | 30 min |
| Jul 2, 10:26 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story | 20 min |
| Jul 2, 11:07 PM CDT | Severe Thunderstorm Warning | DMX | Polk | 23 min |
| Jul 3, 4:37 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 38 min |
| Jul 3, 9:38 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson, Scott | 37 min |
| Jul 3, 9:50 AM CDT | Severe Thunderstorm Warning | DVN | Henry | 24 min |
| Jul 3, 6:25 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 50 min |
| Jul 3, 7:32 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Muscatine, Scott | 58 min |
| Jul 3, 9:31 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee | 59 min |
| Jul 3, 10:22 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 22 min |
| Jul 4, 1:46 AM CDT | Severe Thunderstorm Warning | DMX | Polk | 29 min |
| Jul 4, 2:15 AM CDT | Severe Thunderstorm Warning | DMX | Polk, Warren | 45 min |
| Jul 4, 2:41 AM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe, Warren | 49 min |
| Jul 4, 3:04 AM CDT | Severe Thunderstorm Warning | DMX | Mahaska, Poweshiek | 56 min |
| Jul 4, 3:25 AM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis, Lucas, Mahaska, Monroe, Wapello | 50 min |
| Jul 4, 3:29 AM CDT | Severe Thunderstorm Warning | DVN | Iowa, Keokuk | 61 min |
| Jul 4, 4:25 AM CDT | Severe Thunderstorm Warning | DVN | Cedar, Iowa, Johnson, Linn | 65 min |
| Jul 4, 12:45 PM CDT | Severe Thunderstorm Warning | DMX | Palo Alto, Pocahontas | 30 min |
| Jul 8, 4:01 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 44 min |
| Jul 8, 4:34 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Winneshiek | 41 min |
| Jul 8, 5:00 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Mitchell | 60 min |
| Jul 8, 5:01 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 44 min |
| Jul 8, 5:24 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 37 min |
| Jul 8, 5:50 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 40 min |
| Jul 8, 5:55 PM CDT | Severe Thunderstorm Warning | ARX | Howard, Winneshiek | 50 min |
| Jul 8, 5:57 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 48 min |
| Jul 8, 6:02 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Crawford, Sac | 43 min |
| Jul 8, 6:31 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 44 min |
| Jul 8, 6:33 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Fayette, Howard, Winneshiek | 42 min |
| Jul 8, 6:33 PM CDT | Severe Thunderstorm Warning | DMX | Calhoun, Carroll, Greene, Webster | 42 min |
| Jul 8, 6:53 PM CDT | Severe Thunderstorm Warning | ARX | Fayette, Winneshiek | 38 min |
| Jul 8, 8:08 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 52 min |
| Jul 8, 8:32 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 26 min |
| Jul 8, 8:46 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 29 min |
| Jul 8, 8:53 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 24 min |
| Jul 8, 8:59 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Pottawattamie | 46 min |
| Jul 8, 9:42 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 49 min |
| Jul 8, 9:53 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 37 min |
| Jul 20, 7:06 AM CDT | Severe Thunderstorm Warning | ARX | Mitchell | 34 min |
| Jul 20, 7:35 AM CDT | Severe Thunderstorm Warning | DMX | Worth | 25 min |
| Jul 20, 10:51 AM CDT | Severe Thunderstorm Warning | DVN | Benton, Cedar, Iowa, Johnson, Jones, Linn and 2 more | 54 min |
| Jul 20, 11:52 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Louisa, Muscatine, Scott | 53 min |
| Jul 20, 2:46 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Humboldt, Kossuth, Wright | 44 min |
| Jul 20, 2:51 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin | 39 min |
| Jul 20, 2:53 PM CDT | Severe Thunderstorm Warning | ARX | Floyd | 52 min |
| Jul 20, 3:23 PM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin, Grundy, Hamilton, Hancock and 2 more | 67 min |
| Jul 20, 3:24 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Butler, Franklin, Grundy | 66 min |
| Jul 20, 3:56 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Grundy, Hardin, Marshall, Tama | 64 min |
| Jul 20, 4:13 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer | 37 min |
| Jul 20, 4:18 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Linn | 72 min |
| Jul 20, 4:25 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin | 50 min |
| Jul 20, 4:45 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 60 min |
| Jul 20, 5:00 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Hardin, Story | 45 min |
| Jul 20, 5:11 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Cedar, Iowa, Johnson, Jones, Linn and 1 more | 79 min |
| Jul 20, 5:28 PM CDT | Severe Thunderstorm Warning | DMX | Marshall, Story | 47 min |
| Jul 20, 5:44 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin | 31 min |
| Jul 20, 5:48 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Poweshiek, Tama | 57 min |
| Jul 20, 5:52 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Story | 23 min |
| Jul 20, 6:09 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Hamilton, Hardin, Marshall, Story | 51 min |
| Jul 20, 6:12 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Story | 48 min |
| Jul 20, 6:17 PM CDT | Severe Thunderstorm Warning | DVN | Keokuk, Washington | 58 min |
| Jul 20, 6:21 PM CDT | Severe Thunderstorm Warning | DMX | Boone | 54 min |
| Jul 20, 6:34 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Story | 26 min |
| Jul 20, 6:47 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Jasper, Polk, Story | 43 min |
| Jul 20, 6:53 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 49 min |
| Jul 20, 7:11 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 49 min |
| Jul 20, 7:45 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marion, Polk, Warren | 45 min |
| Jul 20, 8:17 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 58 min |
| Jul 20, 8:21 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Mahaska, Marion, Monroe | 28 min |
| Jul 20, 8:38 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 37 min |
| Jul 20, 9:15 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 17 min |
| Jul 20, 9:47 PM CDT | Severe Thunderstorm Warning | DMX | Dallas, Madison, Polk, Warren | 43 min |
| Jul 20, 9:53 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Lucas, Monroe, Wayne | 52 min |
| Jul 20, 10:24 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Davis | 51 min |
| Jul 25, 8:33 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Sioux | 42 min |
| Jul 25, 8:42 PM CDT | Severe Thunderstorm Warning | FSD | Sioux | 48 min |
| Jul 25, 8:53 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola, Sioux | 37 min |
| Jul 25, 9:09 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, O'Brien, Plymouth, Sioux | 51 min |
| Jul 25, 9:26 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux | 34 min |
| Jul 25, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 2 more | 41 min |
| Jul 25, 9:53 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 37 min |
| Jul 26, 4:59 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Butler, Grundy | 46 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Polk County15
- Story County13
- Sioux County12
- Lyon County11
- Hardin County10
- Marshall County10
- Jasper County9
- Hamilton County8
- Plymouth County7
- O'Brien County7
- Osceola County7
- Howard County7
- Webster County7
- Boone County7
- Warren County7
- Harrison County7
- Cherokee County6
- Grundy County6
- Ida County5
- Woodbury County5
- Winneshiek County5
- Black Hawk County5
- Wright County5
- Franklin County5
- Mitchell County4
- Cerro Gordo County4
- Fayette County4
- Calhoun County4
- Dallas County4
- Cedar County4
- Muscatine County4
- Lucas County4
- Mahaska County4
- Marion County4
- Monroe County4
- Iowa County4
- Linn County4
- Butler County4
- Hancock County3
- Bremer County3
47 more counties
- Scott County3
- Poweshiek County3
- Appanoose County3
- Johnson County3
- Pottawattamie County3
- Benton County3
- Tama County3
- Madison County3
- Mills County2
- Buena Vista County2
- Worth County2
- Floyd County2
- Chickasaw County2
- Delaware County2
- Dubuque County2
- Buchanan County2
- Pocahontas County2
- Humboldt County2
- Jackson County2
- Henry County2
- Des Moines County2
- Lee County2
- Davis County2
- Keokuk County2
- Monona County2
- Carroll County2
- Shelby County2
- Jones County2
- Washington County2
- Clay County2
- Montgomery County1
- Allamakee County1
- Clayton County1
- Clinton County1
- Fremont County1
- Wapello County1
- Palo Alto County1
- Crawford County1
- Sac County1
- Greene County1
- Audubon County1
- Cass County1
- Louisa County1
- Kossuth County1
- Jefferson County1
- Wayne County1
- Dickinson County1
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.