Alert archive / Iowa / Severe Thunderstorm Watches / 2021
Severe Thunderstorm Watches in Iowa, June 2021
12 severe thunderstorm watches in June 2021. 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 June 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 12
- Busiest day
- June 20, 20213 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 |
|---|---|---|---|---|
| Jun 11, 5:36 AM CDT | Severe Thunderstorm Watch | SPC | Harrison, Monona, Pottawattamie, Shelby | 5 hr |
| Jun 11, 8:30 AM CDT | Severe Thunderstorm Watch | SPC | Fremont, Mills, Montgomery, Page | 7 hr |
| Jun 16, 10:05 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Cass, Clarke, Dallas and 11 more | 4 hr |
| Jun 17, 3:50 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Cerro Gordo, Chickasaw and 15 more | 6 hr |
| Jun 17, 10:01 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clayton and 10 more | 6 hr |
| Jun 18, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Cass, Cedar, Clarke and 29 more | 8 hr |
| Jun 19, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Audubon, Cass, Fremont, Harrison, Mills and 5 more | 4 hr |
| Jun 20, 1:42 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Butler, Calhoun, Cerro Gordo and 23 more | 7 hr |
| Jun 20, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | Appanoose, Benton, Boone, Buchanan, Cedar, Clarke and 35 more | 7 hr |
| Jun 22, 4:49 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Audubon, Carroll, Cass, Crawford, Greene and 4 more | 4 hr |
| Jun 23, 10:37 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Pottawattamie, Shelby and 1 more | 6 hr |
| Jun 24, 2:20 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 15 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Shelby County5
- Montgomery County5
- Page County5
- Cass County5
- Harrison County4
- Pottawattamie County4
- Fremont County4
- Mills County4
- Adair County4
- Adams County4
- Audubon County4
- Clarke County4
- Decatur County4
- Madison County4
- Ringgold County4
- Taylor County4
- Union County4
- Monona County3
- Dallas County3
- Greene County3
- Guthrie County3
- Allamakee County3
- Bremer County3
- Butler County3
- Cerro Gordo County3
- Chickasaw County3
- Clayton County3
- Fayette County3
- Floyd County3
- Franklin County3
- Hancock County3
- Howard County3
- Humboldt County3
- Mitchell County3
- Winneshiek County3
- Worth County3
- Wright County3
- Warren County3
- Black Hawk County2
- Grundy County2
48 more counties
- Hamilton County2
- Hardin County2
- Webster County2
- Appanoose County2
- Cedar County2
- Davis County2
- Des Moines County2
- Henry County2
- Iowa County2
- Jefferson County2
- Johnson County2
- Keokuk County2
- Lee County2
- Louisa County2
- Lucas County2
- Mahaska County2
- Marion County2
- Monroe County2
- Muscatine County2
- Scott County2
- Van Buren County2
- Wapello County2
- Washington County2
- Wayne County2
- Boone County2
- Polk County2
- Story County2
- Carroll County2
- Crawford County2
- Calhoun County1
- Emmet County1
- Kossuth County1
- Marshall County1
- Palo Alto County1
- Pocahontas County1
- Tama County1
- Winnebago County1
- Benton County1
- Buchanan County1
- Clinton County1
- Delaware County1
- Dubuque County1
- Jackson County1
- Jasper County1
- Jones County1
- Linn County1
- Poweshiek County1
- Woodbury County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.