Alert archive / Iowa / Tornado Warnings
Tornado Warnings in Iowa, 2021
106 tornado warnings in 2021. 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Tornado Warnings
- 106
- Busiest month
- July36 tornado warnings
- Busiest day
- December 15, 202129 tornado warnings
Over time
By month
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 |
|---|---|---|---|---|
| Mar 23, 7:11 PM CDT | Tornado Warning | DVN | Des Moines, Lee | 19 min |
| Mar 23, 7:40 PM CDT | Tornado Warning | DVN | Washington | 15 min |
| May 20, 9:39 PM CDT | Tornado Warning | DMX | Boone, Dallas | 22 min |
| Jun 20, 6:04 PM CDT | Tornado Warning | DMX | Decatur | 26 min |
| Jun 20, 6:37 PM CDT | Tornado Warning | DMX | Mahaska, Marion | 23 min |
| Jun 20, 6:59 PM CDT | Tornado Warning | DMX | Mahaska, Marion | 31 min |
| Jun 20, 7:48 PM CDT | Tornado Warning | DVN | Dubuque, Jackson, Jones | 42 min |
| Jun 20, 8:27 PM CDT | Tornado Warning | DVN | Jackson | 33 min |
| Jun 20, 8:28 PM CDT | Tornado Warning | DVN | Keokuk, Washington | 32 min |
| Jun 20, 8:37 PM CDT | Tornado Warning | DVN | Des Moines, Lee | 39 min |
| Jun 24, 6:18 PM CDT | Tornado Warning | DMX | Adams | 27 min |
| Jun 29, 3:25 PM CDT | Tornado Warning | ARX | Allamakee | 65 min |
| Jul 10, 4:36 PM CDT | Tornado Warning | DMX | Dallas, Guthrie | 24 min |
| Jul 10, 5:00 PM CDT | Tornado Warning | DMX | Dallas | 30 min |
| Jul 14, 3:55 PM CDT | Tornado Warning | DMX | Calhoun, Carroll, Greene | 35 min |
| Jul 14, 4:04 PM CDT | Tornado Warning | DMX | Boone, Hamilton, Story, Webster | 41 min |
| Jul 14, 4:23 PM CDT | Tornado Warning | DMX | Franklin, Hamilton, Hardin, Wright | 37 min |
| Jul 14, 4:29 PM CDT | Tornado Warning | DMX | Calhoun, Greene, Webster | 31 min |
| Jul 14, 4:29 PM CDT | Tornado Warning | DMX | Hamilton, Hardin | 31 min |
| Jul 14, 4:30 PM CDT | Tornado Warning | DMX | Butler | 30 min |
| Jul 14, 4:35 PM CDT | Tornado Warning | DMX | Franklin, Hardin | 40 min |
| Jul 14, 4:53 PM CDT | Tornado Warning | DMX | Bremer, Butler | 37 min |
| Jul 14, 4:56 PM CDT | Tornado Warning | DMX | Hamilton, Hardin | 25 min |
| Jul 14, 5:00 PM CDT | Tornado Warning | DMX | Hamilton, Hardin, Story | 25 min |
| Jul 14, 5:23 PM CDT | Tornado Warning | DMX | Black Hawk, Bremer, Butler | 37 min |
| Jul 14, 5:33 PM CDT | Tornado Warning | ARX | Floyd | 42 min |
| Jul 14, 5:50 PM CDT | Tornado Warning | DMX | Cerro Gordo | 25 min |
| Jul 14, 5:53 PM CDT | Tornado Warning | DMX | Black Hawk, Bremer | 37 min |
| Jul 14, 5:58 PM CDT | Tornado Warning | DMX | Calhoun | 47 min |
| Jul 14, 6:00 PM CDT | Tornado Warning | ARX | Fayette | 45 min |
| Jul 14, 6:02 PM CDT | Tornado Warning | DMX | Black Hawk, Grundy, Marshall, Tama | 43 min |
| Jul 14, 6:09 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 52 min |
| Jul 14, 6:25 PM CDT | Tornado Warning | DVN | Buchanan | 50 min |
| Jul 14, 6:42 PM CDT | Tornado Warning | DMX | Webster | 36 min |
| Jul 14, 6:55 PM CDT | Tornado Warning | DMX | Tama | 19 min |
| Jul 14, 6:58 PM CDT | Tornado Warning | DVN | Benton | 47 min |
| Jul 14, 7:28 PM CDT | Tornado Warning | DVN | Buchanan, Delaware | 17 min |
| Jul 14, 7:43 PM CDT | Tornado Warning | DVN | Benton | 32 min |
| Jul 14, 7:43 PM CDT | Tornado Warning | DVN | Buchanan, Delaware | 32 min |
| Jul 14, 7:53 PM CDT | Tornado Warning | DVN | Benton | 27 min |
| Jul 14, 8:10 PM CDT | Tornado Warning | DMX | Marshall | 35 min |
| Jul 14, 8:19 PM CDT | Tornado Warning | DVN | Benton, Linn | 22 min |
| Jul 14, 8:31 PM CDT | Tornado Warning | DVN | Benton, Linn | 29 min |
| Jul 14, 8:56 PM CDT | Tornado Warning | DVN | Delaware, Linn | 49 min |
| Jul 14, 9:29 PM CDT | Tornado Warning | DVN | Delaware, Jones | 46 min |
| Jul 14, 10:02 PM CDT | Tornado Warning | DVN | Jones | 43 min |
| Jul 14, 10:34 PM CDT | Tornado Warning | DVN | Cedar | 26 min |
| Jul 30, 10:12 PM CDT | Tornado Warning | OAX | Page | 18 min |
| Aug 8, 4:29 PM CDT | Tornado Warning | FSD | Osceola | 31 min |
| Aug 8, 5:26 PM CDT | Tornado Warning | FSD | Clay, Dickinson, O'Brien | 49 min |
| Aug 8, 6:31 PM CDT | Tornado Warning | FSD | Buena Vista, Clay | 44 min |
| Aug 8, 7:15 PM CDT | Tornado Warning | FSD | Buena Vista, Clay | 45 min |
| Aug 8, 8:36 PM CDT | Tornado Warning | DMX | Pocahontas | 24 min |
| Aug 8, 9:02 PM CDT | Tornado Warning | DMX | Calhoun, Pocahontas | 31 min |
| Aug 8, 11:00 PM CDT | Tornado Warning | DMX | Webster | 30 min |
| Aug 8, 11:30 PM CDT | Tornado Warning | DMX | Webster | 30 min |
| Aug 8, 11:52 PM CDT | Tornado Warning | DMX | Boone, Webster | 38 min |
| Aug 9, 12:23 AM CDT | Tornado Warning | DMX | Butler, Franklin | 20 min |
| Aug 11, 5:38 PM CDT | Tornado Warning | DVN | Dubuque | 13 min |
| Aug 24, 3:38 PM CDT | Tornado Warning | DVN | Dubuque | 25 min |
| Aug 26, 11:20 PM CDT | Tornado Warning | DVN | Jefferson, Keokuk | 27 min |
| Aug 27, 1:04 AM CDT | Tornado Warning | FSD | Sioux | 26 min |
| Aug 27, 4:48 PM CDT | Tornado Warning | DMX | Cerro Gordo, Hancock | 57 min |
| Aug 27, 5:23 PM CDT | Tornado Warning | DMX | Cerro Gordo | 37 min |
| Aug 27, 5:25 PM CDT | Tornado Warning | DMX | Cerro Gordo | 35 min |
| Aug 27, 5:34 PM CDT | Tornado Warning | ARX | Floyd | 41 min |
| Aug 27, 6:09 PM CDT | Tornado Warning | ARX | Chickasaw, Floyd | 51 min |
| Aug 27, 6:45 PM CDT | Tornado Warning | ARX | Chickasaw, Fayette | 45 min |
| Aug 28, 4:39 PM CDT | Tornado Warning | FSD | Lyon | 36 min |
| Aug 28, 4:45 PM CDT | Tornado Warning | FSD | Lyon | 30 min |
| Dec 10, 6:26 PM CST | Tornado Warning | DVN | Des Moines, Henry, Louisa | 20 min |
| Dec 15, 4:00 PM CST | Tornado Warning | FSD | Woodbury | 45 min |
| Dec 15, 4:01 PM CST | Tornado Warning | OAX | Fremont, Mills | 14 min |
| Dec 15, 4:12 PM CST | Tornado Warning | OAX | Fremont, Mills | 33 min |
| Dec 15, 4:16 PM CST | Tornado Warning | OAX | Harrison, Pottawattamie | 17 min |
| Dec 15, 4:17 PM CST | Tornado Warning | FSD | Plymouth, Woodbury | 28 min |
| Dec 15, 4:21 PM CST | Tornado Warning | OAX | Pottawattamie | 24 min |
| Dec 15, 4:30 PM CST | Tornado Warning | OAX | Mills, Montgomery, Pottawattamie | 30 min |
| Dec 15, 4:31 PM CST | Tornado Warning | FSD | Ida, Plymouth, Woodbury | 29 min |
| Dec 15, 4:31 PM CST | Tornado Warning | OAX | Harrison, Monona, Shelby | 13 min |
| Dec 15, 4:32 PM CST | Tornado Warning | FSD | Plymouth, Woodbury | 28 min |
| Dec 15, 4:37 PM CST | Tornado Warning | DMX | Cass | 23 min |
| Dec 15, 4:37 PM CST | Tornado Warning | OAX | Harrison, Shelby | 23 min |
| Dec 15, 4:42 PM CST | Tornado Warning | FSD | Buena Vista, Cherokee, Clay, Ida, O'Brien, Plymouth and 1 more | 33 min |
| Dec 15, 4:44 PM CST | Tornado Warning | DMX | Crawford | 36 min |
| Dec 15, 4:46 PM CST | Tornado Warning | OAX | Pottawattamie, Shelby | 20 min |
| Dec 15, 4:53 PM CST | Tornado Warning | DMX | Adair, Audubon, Cass, Guthrie | 33 min |
| Dec 15, 4:54 PM CST | Tornado Warning | OAX | Montgomery, Page | 15 min |
| Dec 15, 4:55 PM CST | Tornado Warning | OAX | Shelby | 14 min |
| Dec 15, 5:07 PM CST | Tornado Warning | DMX | Sac | 27 min |
| Dec 15, 5:08 PM CST | Tornado Warning | FSD | Buena Vista, Cherokee, Clay | 37 min |
| Dec 15, 5:10 PM CST | Tornado Warning | DMX | Carroll, Crawford | 35 min |
| Dec 15, 5:14 PM CST | Tornado Warning | DMX | Audubon, Calhoun, Carroll, Greene, Guthrie | 31 min |
| Dec 15, 5:15 PM CST | Tornado Warning | DMX | Calhoun, Carroll, Crawford, Sac | 30 min |
| Dec 15, 5:15 PM CST | Tornado Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien | 30 min |
| Dec 15, 5:18 PM CST | Tornado Warning | DMX | Adair, Boone, Dallas, Greene, Guthrie | 42 min |
| Dec 15, 5:36 PM CST | Tornado Warning | DMX | Calhoun, Humboldt, Kossuth, Palo Alto, Pocahontas | 24 min |
| Dec 15, 5:38 PM CST | Tornado Warning | DMX | Boone, Calhoun, Greene, Hamilton, Webster | 37 min |
| Dec 15, 5:45 PM CST | Tornado Warning | DMX | Calhoun, Pocahontas, Webster | 30 min |
| Dec 15, 5:58 PM CST | Tornado Warning | DMX | Hancock, Humboldt, Kossuth, Palo Alto, Pocahontas | 32 min |
| Dec 15, 6:19 PM CST | Tornado Warning | DMX | Hancock, Kossuth, Winnebago | 41 min |
| Dec 15, 6:37 PM CST | Tornado Warning | DMX | Butler, Cerro Gordo, Franklin | 20 min |
| Dec 15, 6:44 PM CST | Tornado Warning | ARX | Floyd | 32 min |
| Dec 15, 7:25 PM CST | Tornado Warning | ARX | Howard | 20 min |
| Dec 15, 7:38 PM CST | Tornado Warning | ARX | Winneshiek | 37 min |
| Dec 15, 8:06 PM CST | Tornado Warning | DVN | Benton, Buchanan | 20 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calhoun County9
- Webster County8
- Hamilton County6
- Benton County6
- Clay County6
- Boone County5
- Greene County5
- Hardin County5
- Butler County5
- Floyd County5
- Cerro Gordo County5
- Buena Vista County5
- Pocahontas County5
- Woodbury County5
- Dallas County4
- Guthrie County4
- Carroll County4
- Franklin County4
- Buchanan County4
- Delaware County4
- Pottawattamie County4
- Plymouth County4
- Shelby County4
- Des Moines County3
- Dubuque County3
- Jones County3
- Bremer County3
- Black Hawk County3
- Chickasaw County3
- Linn County3
- O'Brien County3
- Hancock County3
- Mills County3
- Harrison County3
- Cherokee County3
- Crawford County3
- Kossuth County3
- Lee County2
- Washington County2
- Mahaska County2
34 more counties
- Marion County2
- Jackson County2
- Keokuk County2
- Story County2
- Fayette County2
- Marshall County2
- Tama County2
- Page County2
- Lyon County2
- Fremont County2
- Montgomery County2
- Ida County2
- Cass County2
- Adair County2
- Audubon County2
- Sac County2
- Humboldt County2
- Palo Alto County2
- Decatur County1
- Adams County1
- Allamakee County1
- Wright County1
- Grundy County1
- Cedar County1
- Osceola County1
- Dickinson County1
- Jefferson County1
- Sioux County1
- Henry County1
- Louisa County1
- Monona County1
- Winnebago County1
- Howard County1
- Winneshiek County1
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.