Alert archive / Iowa / Severe Thunderstorm Watches / 2021
Severe Thunderstorm Watches in Iowa, July 2021
9 severe thunderstorm watches in July 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 July 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 9
- Busiest day
- July 10, 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 |
|---|---|---|---|---|
| Jul 6, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Buena Vista, Cerro Gordo, Cherokee, Clay, Dickinson and 16 more | 8 hr |
| Jul 8, 9:33 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Cherokee, Clay, Ida, Lyon, O'Brien and 3 more | 5 hr |
| Jul 9, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | Des Moines, Henry, Iowa, Jefferson, Johnson, Keokuk and 4 more | 3 hr |
| Jul 9, 9:58 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Carroll, Cass, Clarke and 16 more | 7 hr |
| Jul 10, 2:18 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Audubon, Cass, Fremont, Harrison, Mills and 5 more | 7 hr |
| Jul 14, 8:54 AM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 13 more | 5 hr |
| Jul 27, 8:03 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Bremer, Buchanan, Chickasaw, Clayton, Delaware and 7 more | 6 hr |
| Jul 28, 7:17 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Clayton, Fayette, Winneshiek | 7 hr |
| Jul 30, 8:47 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Decatur, Fremont, Mills, Montgomery, Page and 4 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Allamakee County4
- Winneshiek County4
- Howard County3
- Mitchell County3
- Worth County3
- Adams County3
- Fremont County3
- Mills County3
- Montgomery County3
- Page County3
- Taylor County3
- Clayton County3
- Fayette County3
- Buena Vista County2
- Cerro Gordo County2
- Cherokee County2
- Clay County2
- Ida County2
- Lyon County2
- O'Brien County2
- Plymouth County2
- Sioux County2
- Woodbury County2
- Audubon County2
- Cass County2
- Decatur County2
- Harrison County2
- Pottawattamie County2
- Ringgold County2
- Shelby County2
- Union County2
- Wayne County2
- Bremer County2
- Buchanan County2
- Chickasaw County2
- Delaware County2
- Dubuque County2
- Floyd County2
- Dickinson County1
- Emmet County1
27 more counties
- Hancock County1
- Kossuth County1
- Osceola County1
- Palo Alto County1
- Winnebago County1
- Des Moines County1
- Henry County1
- Iowa County1
- Jefferson County1
- Johnson County1
- Keokuk County1
- Lee County1
- Louisa County1
- Van Buren County1
- Washington County1
- Adair County1
- Carroll County1
- Clarke County1
- Crawford County1
- Guthrie County1
- Madison County1
- Monona County1
- Black Hawk County1
- Butler County1
- Franklin County1
- Grundy County1
- Hardin 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.