Alert archive / Iowa / Tornado Watches
Tornado Watches in Iowa, 2011
25 tornado 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 tornado watches reaches back to 1997.
Tornado Watches by county
Each county as a circle sized by its count in 2011. Tap one for its archive.
- Tornado Watches
- 25
- Busiest month
- May8 tornado watches
- Busiest day
- April 10, 20113 tornado 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 |
|---|---|---|---|---|
| Mar 22, 2:03 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 38 more | 7 hr |
| Mar 22, 8:35 PM CDT | Tornado Watch | SPC | Appanoose, Davis, Henry, Jefferson, Keokuk, Lucas and 7 more | 5 hr |
| Apr 3, 5:57 PM CDT | Tornado Watch | SPC | Appanoose, Cedar, Clinton, Davis, Delaware, Des Moines and 20 more | 6 hr |
| Apr 9, 5:48 PM CDT | Tornado Watch | SPC | Audubon, Boone, Buena Vista, Calhoun, Carroll, Cass and 36 more | 7 hr |
| Apr 9, 11:01 PM CDT | Tornado Watch | SPC | Allamakee, Bremer, Buena Vista, Butler, Cerro Gordo, Cherokee and 19 more | 5 hr |
| Apr 10, 3:19 PM CDT | Tornado Watch | SPC | Allamakee, Clayton, Fayette, Howard, Winneshiek | 7 hr |
| Apr 10, 6:05 PM CDT | Tornado Watch | SPC | Clinton, Des Moines, Jackson, Lee, Louisa, Muscatine and 1 more | 7 hr |
| May 11, 2:53 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 33 more | 6 hr |
| May 12, 2:37 PM CDT | Tornado Watch | SPC | Harrison, Monona, Shelby | 7 hr |
| May 22, 12:07 PM CDT | Tornado Watch | SPC | Allamakee, Chickasaw, Clayton, Fayette, Floyd, Howard and 2 more | 7 hr |
| May 22, 12:51 PM CDT | Tornado Watch | SPC | Appanoose, Benton, Black Hawk, Bremer, Buchanan, Butler and 35 more | 10 hr |
| May 25, 1:22 AM CDT | Tornado Watch | SPC | Lee | 7 hr |
| May 25, 2:31 PM CDT | Tornado Watch | SPC | Des Moines, Henry, Lee, Louisa, Van Buren | 7 hr |
| May 29, 7:16 PM CDT | Tornado Watch | SPC | Fremont, Harrison, Mills, Montgomery, Pottawattamie, Shelby | 4 hr |
| May 30, 8:43 PM CDT | Tornado Watch | SPC | Clay, Dickinson, Lyon, O'Brien, Osceola, Sioux | 5 hr |
| Jun 9, 3:05 PM CDT | Tornado Watch | SPC | Appanoose, Decatur, Fremont, Page, Ringgold, Taylor and 1 more | 7 hr |
| Jun 14, 3:53 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 13 more | 8 hr |
| Jun 19, 6:51 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 27 more | 7 hr |
| Jun 19, 9:49 PM CDT | Tornado Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 6 hr |
| Jun 20, 3:08 PM CDT | Tornado Watch | SPC | Audubon, Carroll, Cass, Crawford, Fremont, Harrison and 6 more | 7 hr |
| Jun 20, 6:53 PM CDT | Tornado Watch | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 41 more | 6 hr |
| Jun 20, 10:58 PM CDT | Tornado Watch | SPC | Appanoose, Black Hawk, Bremer, Butler, Cerro Gordo, Davis and 17 more | 4 hr |
| Jul 5, 6:10 PM CDT | Tornado Watch | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 24 more | 4 hr |
| Jul 27, 7:43 PM CDT | Tornado Watch | SPC | Cedar, Clinton, Delaware, Dubuque, Jackson, Jones | 5 hr |
| Aug 18, 6:38 PM CDT | Tornado Watch | SPC | Fremont, Mills, Page | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Appanoose County10
- Fremont County10
- Page County10
- Wayne County10
- Davis County9
- Lucas County9
- Monroe County9
- Wapello County9
- Audubon County8
- Cass County8
- Harrison County8
- Mahaska County8
- Mills County8
- Montgomery County8
- Shelby County8
- Carroll County7
- Decatur County7
- Guthrie County7
- Marion County7
- Monona County7
- Pottawattamie County7
- Ringgold County7
- Taylor County7
- Adair County6
- Adams County6
- Boone County6
- Clarke County6
- Crawford County6
- Greene County6
- Jasper County6
- Madison County6
- Union County6
- Dallas County5
- Marshall County5
- Polk County5
- Poweshiek County5
- Story County5
- Tama County5
- Warren County5
- Lee County5
59 more counties
- Calhoun County4
- Webster County4
- Henry County4
- Van Buren County4
- Clinton County4
- Des Moines County4
- Jackson County4
- Louisa County4
- Cerro Gordo County4
- Clay County4
- Franklin County4
- O'Brien County4
- Worth County4
- Ida County3
- Sac County3
- Woodbury County3
- Jefferson County3
- Keokuk County3
- Washington County3
- Cedar County3
- Delaware County3
- Dubuque County3
- Jones County3
- Muscatine County3
- Scott County3
- Buena Vista County3
- Cherokee County3
- Dickinson County3
- Emmet County3
- Hamilton County3
- Hancock County3
- Hardin County3
- Humboldt County3
- Kossuth County3
- Lyon County3
- Osceola County3
- Palo Alto County3
- Pocahontas County3
- Sioux County3
- Winnebago County3
- Wright County3
- Allamakee County3
- Bremer County3
- Butler County3
- Clayton County3
- Fayette County3
- Howard County3
- Winneshiek County3
- Iowa County2
- Johnson County2
- Linn County2
- Plymouth County2
- Chickasaw County2
- Floyd County2
- Mitchell County2
- Black Hawk County2
- Grundy County2
- Benton County1
- Buchanan County1
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. Rebuilt daily.