Alert archive / Iowa / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Iowa, 2011
45 severe thunderstorm watches in 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 45
- Busiest month
- June13 severe thunderstorm watches
- Busiest day
- July 11, 20116 severe thunderstorm watches
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 |
|---|---|---|---|---|
| Apr 9, 7:42 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Chickasaw, Floyd, Howard, Mitchell, Winneshiek | 7 hr |
| May 11, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 17 more | 6 hr |
| May 12, 6:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 32 more | 7 hr |
| May 21, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 49 more | 10 hr |
| May 29, 8:53 AM CDT | Severe Thunderstorm Watch | SPC | Cedar, Clinton, Des Moines, Henry, Iowa, Jackson and 10 more | 6 hr |
| May 29, 10:58 PM CDT | Severe Thunderstorm Watch | SPC | Dickinson, Lyon, O'Brien, Osceola, Plymouth, Sioux | 6 hr |
| May 30, 8:37 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Harrison, Monona, Plymouth, Woodbury | 5 hr |
| Jun 4, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Van Buren | 6 hr |
| Jun 5, 5:00 AM CDT | Severe Thunderstorm Watch | SPC | Davis, Des Moines, Henry, Jefferson, Keokuk, Lee and 7 more | 7 hr |
| Jun 6, 2:09 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Chickasaw, Clayton, Fayette, Howard, Mitchell and 1 more | 8 hr |
| Jun 8, 4:49 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Clayton, Clinton and 15 more | 8 hr |
| Jun 8, 5:18 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Black Hawk, Bremer, Cass and 23 more | 7 hr |
| Jun 9, 9:48 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 33 more | 6 hr |
| Jun 16, 11:03 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 5 hr |
| Jun 17, 7:09 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Carroll, Cass, Cherokee, Clay and 18 more | 3 hr |
| Jun 19, 11:42 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 10 more | 6 hr |
| Jun 20, 3:46 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Black Hawk, Boone, Calhoun, Carroll and 26 more | 5 hr |
| Jun 26, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 40 more | 7 hr |
| Jun 26, 7:12 PM CDT | Severe Thunderstorm Watch | SPC | Jefferson, Lee, Van Buren | 6 hr |
| Jun 26, 10:02 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more | 5 hr |
| Jul 1, 2:08 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 9 hr |
| Jul 1, 8:07 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Floyd and 13 more | 5 hr |
| Jul 5, 4:47 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 8 hr |
| Jul 10, 10:10 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 13 more | 6 hr |
| Jul 10, 10:57 PM CDT | Severe Thunderstorm Watch | SPC | Harrison, Mills, Monona, Montgomery, Pottawattamie, Shelby | 4 hr |
| Jul 10, 11:56 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 5 more | 4 hr |
| Jul 11, 1:08 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 38 more | 13 min |
| Jul 11, 1:21 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Black Hawk, Boone, Bremer and 38 more | 4 hr |
| Jul 11, 3:30 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Buchanan, Cedar, Chickasaw, Clayton and 18 more | 6 hr |
| Jul 18, 8:05 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Clayton | 4 hr |
| Jul 21, 10:44 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page, Pottawattamie | 89 min |
| Jul 23, 10:14 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Howard, Winneshiek | 4 hr |
| Jul 23, 5:16 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Clarke, Davis and 25 more | 4 hr |
| Aug 1, 2:04 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Howard, Mitchell, Winneshiek | 5 hr |
| Aug 6, 5:32 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Calhoun, Carroll and 23 more | 9 hr |
| Aug 6, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Cedar, Davis, Des Moines, Henry, Iowa and 16 more | 5 hr |
| Aug 7, 7:49 PM CDT | Severe Thunderstorm Watch | SPC | Ida, Woodbury | 7 hr |
| Aug 7, 11:34 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Calhoun, Carroll, Cass and 15 more | 4 hr |
| Aug 11, 7:19 PM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Ida, Lyon, O'Brien, Osceola, Plymouth and 2 more | 5 hr |
| Aug 18, 1:27 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Carroll, Cass, Cherokee and 17 more | 8 hr |
| Aug 23, 3:00 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Benton, Black Hawk, Boone, Bremer, Buchanan and 24 more | 6 hr |
| Aug 28, 8:00 AM CDT | Severe Thunderstorm Watch | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cass and 27 more | 5 hr |
| Sep 2, 3:48 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 15 more | 6 hr |
| Sep 2, 10:23 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Benton, Black Hawk, Boone, Buchanan, Cass and 26 more | 6 hr |
| Sep 3, 12:48 AM CDT | Severe Thunderstorm Watch | SPC | Clayton, Fayette | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cass County15
- Mills County15
- Montgomery County15
- Pottawattamie County15
- Adair County13
- Fremont County13
- Guthrie County13
- Page County13
- Allamakee County12
- Audubon County12
- Carroll County12
- Crawford County12
- Mahaska County12
- Marion County12
- Harrison County12
- Adams County11
- Boone County11
- Greene County11
- Madison County11
- Sac County11
- Union County11
- Warren County11
- Monona County11
- Shelby County11
- Jefferson County10
- Keokuk County10
- Van Buren County10
- Washington County10
- Dallas County10
- Webster County10
- Woodbury County10
- Howard County9
- Winneshiek County9
- Clayton County9
- Henry County9
- Lee County9
- Louisa County9
- Black Hawk County9
- Calhoun County9
- Clarke County9
59 more counties
- Grundy County9
- Ida County9
- Jasper County9
- Marshall County9
- Polk County9
- Poweshiek County9
- Story County9
- Tama County9
- Monroe County9
- Mitchell County8
- Cedar County8
- Des Moines County8
- Iowa County8
- Johnson County8
- Bremer County8
- Hamilton County8
- Hardin County8
- Lucas County8
- Plymouth County8
- Ringgold County8
- Taylor County8
- Chickasaw County7
- Benton County7
- Clinton County7
- Linn County7
- Muscatine County7
- Scott County7
- Butler County7
- Cherokee County7
- Davis County7
- Humboldt County7
- Lyon County7
- Wapello County7
- Fayette County7
- Floyd County6
- Buchanan County6
- Delaware County6
- Jackson County6
- Jones County6
- Appanoose County6
- Decatur County6
- Kossuth County6
- O'Brien County6
- Osceola County6
- Sioux County6
- Wayne County6
- Cerro Gordo County6
- Franklin County6
- Hancock County6
- Winnebago County6
- Worth County6
- Dubuque County5
- Dickinson County5
- Emmet County5
- Palo Alto County5
- Pocahontas County5
- Wright County5
- Buena Vista County4
- Clay County4
The busiest days
Days with the most alerts issued, by UTC date.
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. Warning verification from the Mesonet's Cow. Rebuilt daily.