Alert archive / Iowa / Severe Thunderstorm Watches / 2011
Severe Thunderstorm Watches in Iowa, August 2011
9 severe thunderstorm watches 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in August 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 9
- Busiest day
- August 8, 20112 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 |
|---|---|---|---|---|
| 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 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Ida County5
- Woodbury County5
- Audubon County4
- Carroll County4
- Cass County4
- Crawford County4
- Fremont County4
- Guthrie County4
- Harrison County4
- Mills County4
- Monona County4
- Montgomery County4
- Page County4
- Pottawattamie County4
- Sac County4
- Shelby County4
- Adair County3
- Adams County3
- Boone County3
- Calhoun County3
- Greene County3
- Ringgold County3
- Taylor County3
- Union County3
- Webster County3
- Cherokee County3
- Plymouth County3
- Allamakee County2
- Howard County2
- Mitchell County2
- Winneshiek County2
- Lyon County2
- O'Brien County2
- Osceola County2
- Sioux County2
- Hamilton County2
- Humboldt County2
- Clarke County1
- Dallas County1
- Decatur County1
50 more counties
- Madison County1
- Appanoose County1
- Cedar County1
- Davis County1
- Des Moines County1
- Henry County1
- Iowa County1
- Jefferson County1
- Johnson County1
- Keokuk County1
- Lee County1
- Louisa County1
- Lucas County1
- Mahaska County1
- Marion County1
- Monroe County1
- Muscatine County1
- Scott County1
- Van Buren County1
- Wapello County1
- Warren County1
- Washington County1
- Wayne County1
- Benton County1
- Black Hawk County1
- Bremer County1
- Buchanan County1
- Butler County1
- Cerro Gordo County1
- Chickasaw County1
- Clayton County1
- Delaware County1
- Fayette County1
- Floyd County1
- Franklin County1
- Grundy County1
- Hancock County1
- Hardin County1
- Linn County1
- Marshall County1
- Story County1
- Tama County1
- Winnebago County1
- Worth County1
- Wright County1
- Buena Vista County1
- Clay County1
- Dickinson County1
- Palo Alto County1
- Pocahontas 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.