Alert archive / Iowa / Severe Thunderstorm Watches / 2011
Severe Thunderstorm Watches in Iowa, May 2011
6 severe thunderstorm watches in May 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 May 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- May 11, 20111 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 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Woodbury County3
- Plymouth County3
- Cedar County2
- Clinton County2
- Des Moines County2
- Henry County2
- Iowa County2
- Jackson County2
- Jefferson County2
- Johnson County2
- Jones County2
- Keokuk County2
- Lee County2
- Louisa County2
- Muscatine County2
- Scott County2
- Van Buren County2
- Washington County2
- Adair County2
- Adams County2
- Audubon County2
- Boone County2
- Calhoun County2
- Carroll County2
- Cass County2
- Clarke County2
- Crawford County2
- Dallas County2
- Fremont County2
- Greene County2
- Guthrie County2
- Ida County2
- Jasper County2
- Madison County2
- Mahaska County2
- Marion County2
- Mills County2
- Montgomery County2
- Page County2
- Polk County2
47 more counties
- Pottawattamie County2
- Poweshiek County2
- Sac County2
- Union County2
- Warren County2
- Webster County2
- Cherokee County2
- Dickinson County2
- Harrison County2
- Lyon County2
- Monona County2
- O'Brien County2
- Osceola County2
- Sioux County2
- Allamakee County1
- Benton County1
- Buchanan County1
- Clayton County1
- Delaware County1
- Dubuque County1
- Linn County1
- Black Hawk County1
- Bremer County1
- Butler County1
- Grundy County1
- Hamilton County1
- Hardin County1
- Marshall County1
- Story County1
- Tama County1
- Appanoose County1
- Buena Vista County1
- Clay County1
- Davis County1
- Decatur County1
- Emmet County1
- Humboldt County1
- Kossuth County1
- Lucas County1
- Monroe County1
- Palo Alto County1
- Pocahontas County1
- Ringgold County1
- Shelby County1
- Taylor County1
- Wapello County1
- Wayne 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. Warning verification from the Mesonet's Cow. Rebuilt daily.