Alert archive / Iowa / Mesoscale Discussions / 2021
Mesoscale Discussions in Iowa, May 2021
6 mesoscale discussions in May 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 mesoscale discussions reaches back to 2003.
Mesoscale Discussions by county
Each county as a circle sized by its count in May 2021. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- May 2, 20211 mesoscale discussions
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 2, 4:20 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Butler, Cerro Gordo, Chickasaw, Clay and 18 more | 115 min |
| May 3, 2:08 PM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Lee, Louisa, Van Buren | 67 min |
| May 14, 4:58 PM CDT | Mesoscale Discussion | SPC | Lyon | 92 min |
| May 15, 1:16 PM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Black Hawk, Boone, Bremer, Buena Vista and 37 more | 119 min |
| May 20, 9:05 PM CDT | Mesoscale Discussion | SPC | Adair, Allamakee, Black Hawk, Boone, Bremer, Buchanan and 27 more | 115 min |
| May 25, 7:40 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Cass, Dallas and 7 more | 95 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bremer County3
- Butler County3
- Cerro Gordo County3
- Chickasaw County3
- Floyd County3
- Franklin County3
- Hancock County3
- Howard County3
- Mitchell County3
- Worth County3
- Wright County3
- Adair County3
- Boone County3
- Dallas County3
- Greene County3
- Guthrie County3
- Hamilton County3
- Madison County3
- Polk County3
- Story County3
- Allamakee County2
- Clay County2
- Emmet County2
- Fayette County2
- Humboldt County2
- Kossuth County2
- Palo Alto County2
- Winnebago County2
- Winneshiek County2
- Audubon County2
- Black Hawk County2
- Cass County2
- Grundy County2
- Hardin County2
- Jasper County2
- Marshall County2
- Tama County2
- Webster County2
- Clayton County1
- Dickinson County1
21 more counties
- O'Brien County1
- Osceola County1
- Des Moines County1
- Henry County1
- Lee County1
- Louisa County1
- Van Buren County1
- Lyon County1
- Buena Vista County1
- Calhoun County1
- Carroll County1
- Crawford County1
- Ida County1
- Pocahontas County1
- Sac County1
- Shelby County1
- Buchanan County1
- Marion County1
- Warren County1
- Adams County1
- Montgomery 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. Rebuilt daily.