Alert archive / Iowa / Severe Thunderstorm Watches / 2012
Severe Thunderstorm Watches in Iowa, May 2012
20 severe thunderstorm watches in May 2012. 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 May 2012. Tap one for its archive.
- Severe Thunderstorm Watches
- 20
- Busiest day
- May 4, 20124 severe thunderstorm watches
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 |
|---|---|---|---|---|
| May 1, 4:58 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Ida, Monona, Plymouth, Woodbury | 4 hr |
| May 1, 9:18 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Black Hawk, Boone, Buena Vista and 54 more | 7 hr |
| May 3, 12:50 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Cass, Fremont, Mills, Montgomery, Page and 2 more | 4 hr |
| May 4, 12:53 AM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Jefferson, Lee, Van Buren | 4 hr |
| May 4, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Calhoun, Carroll, Cerro Gordo, Cherokee, Clay and 23 more | 9 hr |
| May 4, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Montgomery, Page and 2 more | 5 hr |
| May 4, 6:01 PM CDT | Severe Thunderstorm Watch | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Butler and 22 more | 3 hr |
| May 5, 6:49 AM CDT | Severe Thunderstorm Watch | SPC | Cherokee, Lyon, O'Brien, Osceola, Plymouth, Sioux | 7 hr |
| May 5, 11:38 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Clayton, Emmet, Fayette and 8 more | 6 hr |
| May 5, 6:46 PM CDT | Severe Thunderstorm Watch | SPC | Lyon | 6 hr |
| May 5, 10:03 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Dickinson, Ida, Lyon and 6 more | 7 hr |
| May 6, 7:17 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Clarke, Dallas, Davis and 16 more | 6 hr |
| May 6, 9:29 AM CDT | Severe Thunderstorm Watch | SPC | Benton, Cedar, Clinton, Des Moines, Henry, Iowa and 12 more | 4 hr |
| May 6, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Lee, Louisa, Van Buren | 7 hr |
| May 19, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Pottawattamie, Shelby | 7 hr |
| May 19, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Buena Vista, Calhoun, Carroll, Cass and 17 more | 5 hr |
| May 23, 4:07 PM CDT | Severe Thunderstorm Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 23 more | 7 hr |
| May 24, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 39 more | 4 hr |
| May 27, 3:42 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Crawford, Dickinson, Emmet and 12 more | 8 hr |
| May 28, 12:54 PM CDT | Severe Thunderstorm Watch | SPC | Clayton | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cherokee County8
- Monona County8
- Plymouth County8
- Buena Vista County7
- Ida County7
- Woodbury County7
- O'Brien County7
- Clay County6
- Dickinson County6
- Emmet County6
- Osceola County6
- Sioux County6
- Lyon County6
- Crawford County5
- Harrison County5
- Kossuth County5
- Mills County5
- Palo Alto County5
- Pottawattamie County5
- Sac County5
- Shelby County5
- Calhoun County4
- Carroll County4
- Fremont County4
- Greene County4
- Guthrie County4
- Humboldt County4
- Jasper County4
- Pocahontas County4
- Poweshiek County4
- Webster County4
- Des Moines County4
- Henry County4
- Van Buren County4
- Clayton County4
- Adair County3
- Adams County3
- Audubon County3
- Black Hawk County3
- Cass County3
59 more counties
- Cerro Gordo County3
- Clarke County3
- Grundy County3
- Hancock County3
- Lucas County3
- Mahaska County3
- Marion County3
- Marshall County3
- Monroe County3
- Montgomery County3
- Tama County3
- Wapello County3
- Warren County3
- Winnebago County3
- Worth County3
- Jefferson County3
- Lee County3
- Benton County3
- Cedar County3
- Chickasaw County3
- Fayette County3
- Howard County3
- Iowa County3
- Johnson County3
- Jones County3
- Linn County3
- Winneshiek County3
- Louisa County3
- Boone County2
- Dallas County2
- Franklin County2
- Hamilton County2
- Hardin County2
- Madison County2
- Polk County2
- Story County2
- Union County2
- Wright County2
- Page County2
- Taylor County2
- Bremer County2
- Buchanan County2
- Butler County2
- Delaware County2
- Dubuque County2
- Floyd County2
- Mitchell County2
- Allamakee County2
- Appanoose County2
- Davis County2
- Decatur County2
- Wayne County2
- Clinton County2
- Jackson County2
- Keokuk County2
- Muscatine County2
- Scott County2
- Washington County2
- Ringgold County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20112013
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.