Alert archive / Iowa / Severe Thunderstorm Warnings / 2021
Severe Thunderstorm Warnings in Iowa, July 2021
81 severe thunderstorm warnings in July 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in July 2021. Tap one for its archive.
- Severe Thunderstorm Warnings
- 81
- Busiest day
- July 10, 202126 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 |
|---|---|---|---|---|
| Jul 5, 6:37 PM CDT | Severe Thunderstorm Warning | FSD | Lyon | 38 min |
| Jul 5, 7:16 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 44 min |
| Jul 5, 7:57 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola | 33 min |
| Jul 5, 8:24 PM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 66 min |
| Jul 8, 11:45 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 45 min |
| Jul 8, 11:50 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 40 min |
| Jul 9, 12:29 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Plymouth | 46 min |
| Jul 9, 12:44 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 46 min |
| Jul 9, 12:46 AM CDT | Severe Thunderstorm Warning | FSD | Sioux | 44 min |
| Jul 9, 1:14 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 31 min |
| Jul 9, 2:15 AM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 45 min |
| Jul 9, 8:09 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Union | 28 min |
| Jul 9, 12:28 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Greene, Hamilton, Webster | 47 min |
| Jul 9, 1:01 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Greene, Polk, Story | 44 min |
| Jul 9, 1:27 PM CDT | Severe Thunderstorm Warning | DMX | Boone, Dallas, Madison, Polk, Story | 63 min |
| Jul 9, 2:06 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Madison, Marion, Polk, Warren | 54 min |
| Jul 9, 5:16 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Washington | 29 min |
| Jul 9, 6:07 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Washington | 23 min |
| Jul 9, 6:23 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Louisa | 37 min |
| Jul 9, 6:50 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry | 25 min |
| Jul 9, 7:08 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Lee | 37 min |
| Jul 9, 7:19 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 41 min |
| Jul 9, 7:29 PM CDT | Severe Thunderstorm Warning | DVN | Iowa, Johnson, Keokuk, Louisa, Washington | 31 min |
| Jul 9, 7:51 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Jefferson, Keokuk, Washington | 24 min |
| Jul 9, 8:25 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Lee, Van Buren | 35 min |
| Jul 9, 8:57 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 33 min |
| Jul 9, 9:16 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 44 min |
| Jul 9, 9:31 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold, Union | 15 min |
| Jul 9, 9:38 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 52 min |
| Jul 9, 10:21 PM CDT | Severe Thunderstorm Warning | DMX | Ringgold | 39 min |
| Jul 9, 10:52 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 38 min |
| Jul 9, 11:02 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 29 min |
| Jul 9, 11:19 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 41 min |
| Jul 9, 11:30 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Mills, Montgomery, Pottawattamie, Shelby | 45 min |
| Jul 9, 11:38 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 52 min |
| Jul 9, 11:41 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 49 min |
| Jul 9, 11:55 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 65 min |
| Jul 9, 11:56 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass | 49 min |
| Jul 10, 12:13 AM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Pottawattamie | 47 min |
| Jul 10, 12:26 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 19 min |
| Jul 10, 12:40 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 50 min |
| Jul 10, 12:41 AM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Ringgold, Taylor, Union | 64 min |
| Jul 10, 12:42 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 18 min |
| Jul 10, 12:44 AM CDT | Severe Thunderstorm Warning | OAX | Fremont | 61 min |
| Jul 10, 1:56 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 64 min |
| Jul 10, 2:18 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 42 min |
| Jul 14, 8:08 AM CDT | Severe Thunderstorm Warning | DMX | Kossuth, Winnebago | 52 min |
| Jul 14, 8:39 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Cerro Gordo, Franklin, Grundy, Hancock, Hardin and 1 more | 66 min |
| Jul 14, 8:43 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Winnebago, Worth | 62 min |
| Jul 14, 8:49 AM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin, Marshall, Story, Tama | 56 min |
| Jul 14, 9:06 AM CDT | Severe Thunderstorm Warning | ARX | Floyd | 39 min |
| Jul 14, 11:40 AM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque, Jackson | 35 min |
| Jul 14, 12:35 PM CDT | Severe Thunderstorm Warning | DVN | Dubuque, Jackson | 40 min |
| Jul 14, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Butler | 42 min |
| Jul 14, 5:18 PM CDT | Severe Thunderstorm Warning | DMX | Grundy, Hardin | 42 min |
| Jul 14, 5:49 PM CDT | Severe Thunderstorm Warning | DMX | Black Hawk, Bremer, Butler, Grundy | 41 min |
| Jul 14, 6:04 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 41 min |
| Jul 14, 6:32 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan | 43 min |
| Jul 14, 6:42 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 48 min |
| Jul 14, 6:56 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 49 min |
| Jul 14, 7:23 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story | 67 min |
| Jul 14, 7:29 PM CDT | Severe Thunderstorm Warning | DMX | Tama | 14 min |
| Jul 14, 7:37 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 38 min |
| Jul 14, 7:40 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 35 min |
| Jul 14, 8:11 PM CDT | Severe Thunderstorm Warning | DVN | Delaware, Dubuque | 19 min |
| Jul 14, 8:14 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Linn | 46 min |
| Jul 14, 8:42 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Marshall, Polk, Story | 43 min |
| Jul 14, 8:45 PM CDT | Severe Thunderstorm Warning | DMX | Poweshiek, Tama | 45 min |
| Jul 14, 9:08 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 32 min |
| Jul 14, 10:14 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Johnson, Jones, Linn | 46 min |
| Jul 14, 10:41 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 49 min |
| Jul 14, 10:52 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Jones, Scott | 38 min |
| Jul 14, 11:10 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 50 min |
| Jul 28, 12:50 AM CDT | Severe Thunderstorm Warning | DVN | Buchanan, Delaware | 40 min |
| Jul 30, 8:12 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 33 min |
| Jul 30, 8:42 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Montgomery, Page, Pottawattamie | 33 min |
| Jul 30, 9:03 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Page | 42 min |
| Jul 30, 9:13 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 32 min |
| Jul 30, 9:38 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Union | 37 min |
| Jul 30, 9:39 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 51 min |
| Jul 30, 9:52 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Ringgold, Union | 34 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pottawattamie County10
- Harrison County7
- Henry County6
- Ringgold County6
- Mills County6
- Union County5
- Polk County5
- Story County5
- Montgomery County5
- Page County5
- Delaware County5
- Buchanan County5
- Plymouth County4
- Sioux County4
- Washington County4
- Lee County4
- Shelby County4
- Fremont County4
- Grundy County4
- Tama County4
- Jackson County4
- Benton County4
- Lyon County3
- Osceola County3
- Monona County3
- Adair County3
- Adams County3
- Boone County3
- Madison County3
- Jasper County3
- Iowa County3
- Johnson County3
- Keokuk County3
- Des Moines County3
- Clarke County3
- Cass County3
- Butler County3
- Hardin County3
- Marshall County3
- Dubuque County3
33 more counties
- Linn County3
- O'Brien County2
- Greene County2
- Dallas County2
- Louisa County2
- Decatur County2
- Winnebago County2
- Cerro Gordo County2
- Hancock County2
- Black Hawk County2
- Bremer County2
- Cedar County2
- Jones County2
- Clinton County2
- Clay County1
- Dickinson County1
- Woodbury County1
- Cherokee County1
- Hamilton County1
- Webster County1
- Marion County1
- Warren County1
- Jefferson County1
- Van Buren County1
- Audubon County1
- Taylor County1
- Kossuth County1
- Franklin County1
- Wright County1
- Worth County1
- Floyd County1
- Poweshiek County1
- Scott County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.