Alert archive / Iowa / Severe Thunderstorm Warnings / 2011
Severe Thunderstorm Warnings in Iowa, August 2011
93 severe thunderstorm warnings in August 2011. 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 2011. Tap one for its archive.
- Severe Thunderstorm Warnings
- 93
- Busiest day
- August 7, 201128 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 4, 3:14 PM CDT | Severe Thunderstorm Warning | DMX | Warren | 31 min |
| Aug 6, 7:18 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 42 min |
| Aug 6, 7:34 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 26 min |
| Aug 6, 7:57 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Carroll, Crawford | 48 min |
| Aug 6, 8:14 PM CDT | Severe Thunderstorm Warning | OAX | Shelby | 46 min |
| Aug 6, 8:24 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills | 51 min |
| Aug 6, 8:32 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass, Guthrie | 43 min |
| Aug 6, 8:47 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 43 min |
| Aug 6, 8:54 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 36 min |
| Aug 6, 9:08 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass, Guthrie | 52 min |
| Aug 6, 9:13 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page, Pottawattamie | 47 min |
| Aug 6, 9:19 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 41 min |
| Aug 6, 9:26 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Cass, Ringgold, Taylor, Union | 49 min |
| Aug 6, 9:41 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Audubon, Cass | 49 min |
| Aug 6, 9:58 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Guthrie, Madison | 47 min |
| Aug 6, 10:11 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page, Pottawattamie | 49 min |
| Aug 6, 10:16 PM CDT | Severe Thunderstorm Warning | DMX | Adair, Adams, Madison, Ringgold, Taylor, Union | 44 min |
| Aug 6, 10:45 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Decatur | 45 min |
| Aug 6, 10:46 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Madison, Warren | 29 min |
| Aug 6, 11:08 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Wayne | 52 min |
| Aug 6, 11:09 PM CDT | Severe Thunderstorm Warning | DMX | Clarke, Jasper, Lucas, Madison, Marion, Polk and 1 more | 51 min |
| Aug 6, 11:32 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Monroe | 43 min |
| Aug 6, 11:48 PM CDT | Severe Thunderstorm Warning | DMX | Jasper, Mahaska, Marion, Poweshiek | 57 min |
| Aug 7, 12:02 AM CDT | Severe Thunderstorm Warning | DMX | Davis, Wapello | 58 min |
| Aug 7, 12:20 AM CDT | Severe Thunderstorm Warning | DVN | Henry, Iowa, Jefferson, Johnson, Keokuk, Lee and 2 more | 55 min |
| Aug 7, 12:45 AM CDT | Severe Thunderstorm Warning | OAX | Fremont | 45 min |
| Aug 7, 1:14 AM CDT | Severe Thunderstorm Warning | DVN | Des Moines, Henry, Johnson, Lee, Louisa, Muscatine and 1 more | 61 min |
| Aug 7, 1:55 AM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Louisa, Muscatine, Scott | 50 min |
| Aug 7, 3:19 AM CDT | Severe Thunderstorm Warning | DMX | Butler, Franklin | 41 min |
| Aug 7, 10:58 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 47 min |
| Aug 7, 11:12 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Woodbury | 48 min |
| Aug 7, 11:52 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 38 min |
| Aug 8, 12:11 AM CDT | Severe Thunderstorm Warning | DMX | Carroll, Crawford, Sac | 49 min |
| Aug 8, 3:31 AM CDT | Severe Thunderstorm Warning | DMX | Jasper, Poweshiek | 35 min |
| Aug 8, 11:39 AM CDT | Severe Thunderstorm Warning | DVN | Jackson, Jones | 14 min |
| Aug 8, 12:24 PM CDT | Severe Thunderstorm Warning | DVN | Jackson | 36 min |
| Aug 8, 12:53 PM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 52 min |
| Aug 8, 1:07 PM CDT | Severe Thunderstorm Warning | DVN | Cedar | 38 min |
| Aug 8, 1:41 PM CDT | Severe Thunderstorm Warning | DVN | Cedar, Clinton, Scott | 38 min |
| Aug 8, 3:05 PM CDT | Severe Thunderstorm Warning | DVN | Linn | 32 min |
| Aug 18, 2:00 PM CDT | Severe Thunderstorm Warning | FSD | Ida, Woodbury | 45 min |
| Aug 18, 2:08 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 37 min |
| Aug 18, 2:13 PM CDT | Severe Thunderstorm Warning | DMX | Crawford | 47 min |
| Aug 18, 2:48 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 27 min |
| Aug 18, 3:15 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 18 min |
| Aug 18, 3:34 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Shelby | 41 min |
| Aug 18, 4:07 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie, Shelby | 38 min |
| Aug 18, 4:17 PM CDT | Severe Thunderstorm Warning | OAX | Harrison | 43 min |
| Aug 18, 4:44 PM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 46 min |
| Aug 18, 4:53 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 52 min |
| Aug 18, 4:56 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie | 49 min |
| Aug 18, 5:00 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 45 min |
| Aug 18, 5:20 PM CDT | Severe Thunderstorm Warning | OAX | Mills, Pottawattamie | 40 min |
| Aug 18, 5:25 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Pottawattamie | 50 min |
| Aug 18, 5:43 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 47 min |
| Aug 18, 5:52 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Pottawattamie | 38 min |
| Aug 18, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Montgomery, Page | 28 min |
| Aug 18, 6:05 PM CDT | Severe Thunderstorm Warning | DMX | Adams, Taylor | 40 min |
| Aug 18, 6:15 PM CDT | Severe Thunderstorm Warning | OAX | Monona | 45 min |
| Aug 18, 6:16 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery, Page | 44 min |
| Aug 18, 6:35 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 40 min |
| Aug 18, 6:40 PM CDT | Severe Thunderstorm Warning | OAX | Page | 38 min |
| Aug 18, 6:42 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 48 min |
| Aug 18, 7:08 PM CDT | Severe Thunderstorm Warning | DMX | Audubon, Cass | 52 min |
| Aug 18, 7:14 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 16 min |
| Aug 18, 7:15 PM CDT | Severe Thunderstorm Warning | OAX | Harrison, Pottawattamie, Shelby | 45 min |
| Aug 18, 7:36 PM CDT | Severe Thunderstorm Warning | OAX | Mills | 39 min |
| Aug 18, 7:58 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Page | 47 min |
| Aug 18, 8:23 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 52 min |
| Aug 18, 8:59 PM CDT | Severe Thunderstorm Warning | DMX | Taylor | 46 min |
| Aug 18, 9:01 PM CDT | Severe Thunderstorm Warning | OAX | Page | 18 min |
| Aug 22, 2:23 AM CDT | Severe Thunderstorm Warning | OAX | Mills | 52 min |
| Aug 22, 2:39 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 51 min |
| Aug 22, 4:10 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Mills, Montgomery | 50 min |
| Aug 22, 4:42 AM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 48 min |
| Aug 23, 12:05 AM CDT | Severe Thunderstorm Warning | FSD | Lyon, O'Brien, Osceola, Sioux | 40 min |
| Aug 23, 12:30 AM CDT | Severe Thunderstorm Warning | FSD | Dickinson, Lyon, Osceola | 45 min |
| Aug 23, 1:03 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 42 min |
| Aug 23, 1:14 AM CDT | Severe Thunderstorm Warning | FSD | Clay, Dickinson, O'Brien, Osceola | 46 min |
| Aug 23, 1:45 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, Dickinson, O'Brien | 45 min |
| Aug 23, 2:05 AM CDT | Severe Thunderstorm Warning | DMX | Emmet, Palo Alto, Pocahontas | 55 min |
| Aug 23, 2:25 AM CDT | Severe Thunderstorm Warning | DMX | Hancock, Humboldt, Kossuth, Wright | 65 min |
| Aug 23, 2:49 AM CDT | Severe Thunderstorm Warning | DMX | Humboldt, Webster, Wright | 41 min |
| Aug 23, 3:14 AM CDT | Severe Thunderstorm Warning | DMX | Franklin, Hamilton, Hardin, Webster, Wright | 61 min |
| Aug 23, 4:25 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton, Fayette, Winneshiek | 50 min |
| Aug 23, 5:55 AM CDT | Severe Thunderstorm Warning | DMX | Hamilton | 35 min |
| Aug 23, 6:18 AM CDT | Severe Thunderstorm Warning | DMX | Hardin | 21 min |
| Aug 23, 6:23 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Hancock, Kossuth, Winnebago, Worth | 37 min |
| Aug 23, 6:57 AM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 34 min |
| Aug 28, 10:25 AM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 35 min |
| Aug 28, 11:08 AM CDT | Severe Thunderstorm Warning | OAX | Monona | 52 min |
| Aug 28, 11:28 AM CDT | Severe Thunderstorm Warning | OAX | Harrison, Monona | 47 min |
| Aug 28, 11:51 AM CDT | Severe Thunderstorm Warning | OAX | Pottawattamie | 39 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Fremont County12
- Pottawattamie County12
- Page County11
- Mills County10
- Monona County8
- Harrison County7
- Montgomery County7
- Woodbury County7
- Taylor County6
- Audubon County5
- Shelby County5
- Cass County5
- Adair County5
- Crawford County4
- Madison County4
- O'Brien County4
- Osceola County4
- Dickinson County4
- Warren County3
- Guthrie County3
- Adams County3
- Clarke County3
- Jasper County3
- Cedar County3
- Clinton County3
- Jackson County3
- Clay County3
- Wright County3
- Carroll County2
- Ringgold County2
- Union County2
- Lucas County2
- Marion County2
- Poweshiek County2
- Henry County2
- Johnson County2
- Lee County2
- Washington County2
- Louisa County2
- Muscatine County2
41 more counties
- Scott County2
- Franklin County2
- Ida County2
- Lyon County2
- Hancock County2
- Humboldt County2
- Kossuth County2
- Webster County2
- Hamilton County2
- Hardin County2
- Cerro Gordo County2
- Worth County2
- Decatur County1
- Wayne County1
- Polk County1
- Appanoose County1
- Monroe County1
- Mahaska County1
- Davis County1
- Wapello County1
- Iowa County1
- Jefferson County1
- Keokuk County1
- Van Buren County1
- Des Moines County1
- Butler County1
- Plymouth County1
- Sac County1
- Jones County1
- Linn County1
- Sioux County1
- Buena Vista County1
- Cherokee County1
- Emmet County1
- Palo Alto County1
- Pocahontas County1
- Allamakee County1
- Clayton County1
- Fayette County1
- Winneshiek County1
- Winnebago County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.