Alert archive / Iowa / Mesoscale Discussions / 2021
Mesoscale Discussions in Iowa, December 2021
8 mesoscale discussions in December 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 December 2021. Tap one for its archive.
- Mesoscale Discussions
- 8
- Busiest day
- December 15, 20214 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 |
|---|---|---|---|---|
| Dec 10, 12:27 PM CST | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Lyon, O'Brien, Osceola and 1 more | 4 hr |
| Dec 10, 3:31 PM CST | Mesoscale Discussion | SPC | Clay, Dickinson, Emmet, Kossuth, Lyon, Osceola and 2 more | 4 hr |
| Dec 15, 12:28 PM CST | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Buena Vista and 59 more | 2 hr |
| Dec 15, 3:55 PM CST | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 40 more | 95 min |
| Dec 15, 4:51 PM CST | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Cedar and 24 more | 114 min |
| Dec 15, 5:16 PM CST | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Buena Vista, Calhoun and 30 more | 119 min |
| Dec 15, 7:11 PM CST | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Chickasaw and 13 more | 2 hr |
| Dec 28, 8:59 AM CST | Mesoscale Discussion | SPC | Allamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 34 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Clay County5
- Dickinson County5
- Emmet County5
- Lyon County4
- O'Brien County4
- Osceola County4
- Kossuth County4
- Worth County4
- Sioux County3
- Winnebago County3
- Adair County3
- Adams County3
- Audubon County3
- Boone County3
- Buena Vista County3
- Calhoun County3
- Carroll County3
- Cerro Gordo County3
- Clarke County3
- Dallas County3
- Franklin County3
- Greene County3
- Guthrie County3
- Hamilton County3
- Hardin County3
- Humboldt County3
- Madison County3
- Mahaska County3
- Palo Alto County3
- Pocahontas County3
- Polk County3
- Poweshiek County3
- Ringgold County3
- Sac County3
- Tama County3
- Taylor County3
- Union County3
- Warren County3
- Webster County3
- Allamakee County3
57 more counties
- Benton County3
- Black Hawk County3
- Bremer County3
- Buchanan County3
- Chickasaw County3
- Clayton County3
- Delaware County3
- Fayette County3
- Howard County3
- Iowa County3
- Keokuk County3
- Linn County3
- Mitchell County3
- Winneshiek County3
- Cass County2
- Cherokee County2
- Crawford County2
- Decatur County2
- Fremont County2
- Grundy County2
- Hancock County2
- Harrison County2
- Ida County2
- Jasper County2
- Marshall County2
- Mills County2
- Monona County2
- Montgomery County2
- Page County2
- Plymouth County2
- Pottawattamie County2
- Shelby County2
- Story County2
- Woodbury County2
- Wright County2
- Cedar County2
- Clinton County2
- Des Moines County2
- Dubuque County2
- Henry County2
- Jackson County2
- Jefferson County2
- Johnson County2
- Jones County2
- Louisa County2
- Muscatine County2
- Scott County2
- Washington County2
- Floyd County2
- Appanoose County1
- Lucas County1
- Marion County1
- Monroe County1
- Wayne County1
- Lee County1
- Van Buren County1
- Butler 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.