Alert archive / Iowa / Mesoscale Discussions / 2021
Mesoscale Discussions in Iowa, September 2021
6 mesoscale discussions in September 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 September 2021. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- September 20, 20213 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 |
|---|---|---|---|---|
| Sep 13, 9:23 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more | 97 min |
| Sep 16, 6:23 PM CDT | Mesoscale Discussion | SPC | Dickinson, Lyon, O'Brien, Osceola, Sioux | 97 min |
| Sep 17, 12:53 AM CDT | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, O'Brien, Osceola, Sioux | 67 min |
| Sep 20, 12:38 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 49 more | 2 hr |
| Sep 20, 3:55 PM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer and 49 more | 95 min |
| Sep 20, 5:52 PM CDT | Mesoscale Discussion | SPC | Allamakee, Appanoose, Benton, Black Hawk, Bremer, Buchanan and 30 more | 113 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Butler County4
- Grundy County4
- Boone County3
- Cerro Gordo County3
- Dallas County3
- Franklin County3
- Hamilton County3
- Hancock County3
- Hardin County3
- Polk County3
- Story County3
- Wright County3
- Allamakee County3
- Appanoose County3
- Benton County3
- Black Hawk County3
- Bremer County3
- Buchanan County3
- Chickasaw County3
- Clarke County3
- Clayton County3
- Davis County3
- Decatur County3
- Delaware County3
- Dubuque County3
- Fayette County3
- Howard County3
- Iowa County3
- Jasper County3
- Johnson County3
- Jones County3
- Keokuk County3
- Linn County3
- Lucas County3
- Mahaska County3
- Marion County3
- Marshall County3
- Monroe County3
- Poweshiek County3
- Tama County3
44 more counties
- Wapello County3
- Warren County3
- Washington County3
- Wayne County3
- Winneshiek County3
- Dickinson County2
- O'Brien County2
- Osceola County2
- Sioux County2
- Floyd County2
- Madison County2
- Mitchell County2
- Ringgold County2
- Union County2
- Winnebago County2
- Worth County2
- Jefferson County2
- Audubon County1
- Buena Vista County1
- Calhoun County1
- Carroll County1
- Crawford County1
- Greene County1
- Guthrie County1
- Harrison County1
- Humboldt County1
- Ida County1
- Kossuth County1
- Monona County1
- Palo Alto County1
- Pocahontas County1
- Pottawattamie County1
- Sac County1
- Shelby County1
- Webster County1
- Woodbury County1
- Lyon County1
- Clay County1
- Emmet County1
- Adair County1
- Adams County1
- Taylor County1
- Cedar County1
- Van Buren 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.