Alert archive / Iowa / Mesoscale Discussions / 2020
Mesoscale Discussions in Iowa, August 2020
21 mesoscale discussions in August 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 August 2020. Tap one for its archive.
- Mesoscale Discussions
- 21
- Busiest day
- August 10, 20209 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 |
|---|---|---|---|---|
| Aug 8, 5:00 PM CDT | Mesoscale Discussion | SPC | Howard | 2 hr |
| Aug 9, 1:46 AM CDT | Mesoscale Discussion | SPC | Lyon, Osceola, Sioux | 59 min |
| Aug 9, 1:30 PM CDT | Mesoscale Discussion | SPC | Delaware, Dubuque | 2 hr |
| Aug 9, 10:59 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Buena Vista, Butler, Calhoun, Carroll and 32 more | 3 hr |
| Aug 10, 3:19 AM CDT | Mesoscale Discussion | SPC | Lyon, O'Brien, Osceola, Plymouth, Sioux, Woodbury | 116 min |
| Aug 10, 7:46 AM CDT | Mesoscale Discussion | SPC | Ida, Monona, Plymouth, Woodbury | 89 min |
| Aug 10, 8:40 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Calhoun and 39 more | 65 min |
| Aug 10, 9:45 AM CDT | Mesoscale Discussion | SPC | Adair, Audubon, Boone, Calhoun, Carroll, Cass and 17 more | 90 min |
| Aug 10, 10:42 AM CDT | Mesoscale Discussion | SPC | Allamakee, Buchanan, Cedar, Chickasaw, Clayton, Clinton and 18 more | 93 min |
| Aug 10, 11:00 AM CDT | Mesoscale Discussion | SPC | Boone, Dallas, Jasper, Mahaska, Marion, Marshall and 5 more | 60 min |
| Aug 10, 12:14 PM CDT | Mesoscale Discussion | SPC | Benton, Cedar, Clinton, Iowa, Jackson, Johnson and 10 more | 91 min |
| Aug 10, 1:36 PM CDT | Mesoscale Discussion | SPC | Clinton, Jackson, Scott | 114 min |
| Aug 14, 1:57 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 19 more | 2 hr |
| Aug 14, 5:35 PM CDT | Mesoscale Discussion | SPC | Cherokee, Dickinson, Lyon, Monona, O'Brien, Osceola and 3 more | 85 min |
| Aug 14, 10:21 PM CDT | Mesoscale Discussion | SPC | Howard, Mitchell | 54 min |
| Aug 22, 6:57 PM CDT | Mesoscale Discussion | SPC | Boone, Calhoun, Carroll, Dallas, Greene, Guthrie and 10 more | 93 min |
| Aug 24, 4:00 PM CDT | Mesoscale Discussion | SPC | Allamakee | 90 min |
| Aug 28, 1:28 AM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola, Winnebago | 92 min |
| Aug 28, 6:59 AM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Chickasaw, Floyd, Hancock, Howard and 5 more | 91 min |
| Aug 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Allamakee, Appanoose, Audubon, Benton and 53 more | 64 min |
| Aug 28, 5:29 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clinton, Davis, Des Moines, Henry, Jefferson and 8 more | 91 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Lyon County6
- Osceola County6
- Sioux County5
- Allamakee County5
- Calhoun County5
- Carroll County5
- Plymouth County5
- Webster County5
- Woodbury County5
- Boone County5
- Dallas County5
- Mahaska County5
- Marshall County5
- Polk County5
- Poweshiek County5
- Story County5
- Clinton County5
- Scott County5
- Howard County4
- Dickinson County4
- Hamilton County4
- Humboldt County4
- Monona County4
- O'Brien County4
- Pocahontas County4
- Winnebago County4
- Greene County4
- Guthrie County4
- Hardin County4
- Jasper County4
- Marion County4
- Warren County4
- Tama County4
- Jackson County4
- Louisa County4
- Muscatine County4
- Washington County4
- Delaware County3
- Dubuque County3
- Cerro Gordo County3
59 more counties
- Cherokee County3
- Chickasaw County3
- Crawford County3
- Emmet County3
- Fayette County3
- Floyd County3
- Hancock County3
- Ida County3
- Kossuth County3
- Mitchell County3
- Sac County3
- Winneshiek County3
- Wright County3
- Adair County3
- Appanoose County3
- Audubon County3
- Cass County3
- Madison County3
- Monroe County3
- Shelby County3
- Cedar County3
- Des Moines County3
- Henry County3
- Jefferson County3
- Johnson County3
- Jones County3
- Linn County3
- Van Buren County3
- Keokuk County3
- Bremer County2
- Buena Vista County2
- Clay County2
- Franklin County2
- Palo Alto County2
- Worth County2
- Adams County2
- Clarke County2
- Decatur County2
- Harrison County2
- Lucas County2
- Montgomery County2
- Ringgold County2
- Taylor County2
- Union County2
- Wayne County2
- Grundy County2
- Buchanan County2
- Clayton County2
- Lee County2
- Benton County2
- Iowa County2
- Davis County2
- Wapello County2
- Butler County1
- Fremont County1
- Mills County1
- Page County1
- Pottawattamie County1
- Black Hawk County1
Nearby
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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.