Alert archive / Iowa / Mesoscale Discussions / 2020
Mesoscale Discussions in Iowa, December 2020
6 mesoscale discussions in December 2020. 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 2020. Tap one for its archive.
- Mesoscale Discussions
- 6
- Busiest day
- December 23, 20203 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 12, 1:19 AM CST | Mesoscale Discussion | SPC | Benton, Black Hawk, Buchanan, Delaware, Dubuque, Grundy and 13 more | 6 hr |
| Dec 23, 9:38 AM CST | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more | 5 hr |
| Dec 23, 12:33 PM CST | Mesoscale Discussion | SPC | Calhoun, Cerro Gordo, Hancock, Humboldt, Kossuth, Mitchell and 7 more | 4 hr |
| Dec 23, 5:15 PM CST | Mesoscale Discussion | SPC | Kossuth, Winnebago | 6 hr |
| Dec 29, 10:02 AM CST | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Carroll and 37 more | 5 hr |
| Dec 29, 2:17 PM CST | Mesoscale Discussion | SPC | Benton, Black Hawk, Boone, Bremer, Buchanan, Cedar and 26 more | 4 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Iowa County3
- Jasper County3
- Keokuk County3
- Mahaska County3
- Marion County3
- Marshall County3
- Polk County3
- Poweshiek County3
- Story County3
- Tama County3
- Benton County2
- Black Hawk County2
- Buchanan County2
- Delaware County2
- Dubuque County2
- Grundy County2
- Johnson County2
- Jones County2
- Linn County2
- Kossuth County2
- Winnebago County2
- Boone County2
- Jefferson County2
- Warren County2
- Washington County2
- Buena Vista County1
- Cherokee County1
- Clay County1
- Dickinson County1
- Emmet County1
- Lyon County1
- O'Brien County1
- Osceola County1
- Plymouth County1
- Sioux County1
- Woodbury County1
- Calhoun County1
- Cerro Gordo County1
- Hancock County1
- Humboldt County1
45 more counties
- Mitchell County1
- Palo Alto County1
- Pocahontas County1
- Sac County1
- Webster County1
- Worth County1
- Wright County1
- Adair County1
- Adams County1
- Appanoose County1
- Audubon County1
- Carroll County1
- Cass County1
- Clarke County1
- Dallas County1
- Davis County1
- Decatur County1
- Fremont County1
- Greene County1
- Guthrie County1
- Harrison County1
- Henry County1
- Lucas County1
- Madison County1
- Mills County1
- Monroe County1
- Montgomery County1
- Page County1
- Pottawattamie County1
- Ringgold County1
- Shelby County1
- Taylor County1
- Union County1
- Van Buren County1
- Wapello County1
- Wayne County1
- Bremer County1
- Cedar County1
- Clayton County1
- Clinton County1
- Hardin County1
- Jackson County1
- Louisa County1
- Muscatine County1
- Scott County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.