Alert archive / Iowa / Mesoscale Discussions / 2012
Mesoscale Discussions in Iowa, September 2012
10 mesoscale discussions in September 2012. 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 2012. Tap one for its archive.
- Mesoscale Discussions
- 10
- Busiest day
- September 5, 20125 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 4, 1:33 PM CDT | Mesoscale Discussion | SPC | Allamakee, Bremer, Chickasaw, Clayton, Delaware, Fayette and 2 more | 117 min |
| Sep 4, 5:08 PM CDT | Mesoscale Discussion | SPC | Harrison, Monona | 97 min |
| Sep 4, 6:39 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 9 more | 66 min |
| Sep 4, 7:27 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more | 63 min |
| Sep 4, 8:30 PM CDT | Mesoscale Discussion | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Chickasaw and 8 more | 60 min |
| Sep 4, 9:51 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cerro Gordo, Clay, Dickinson, Emmet and 12 more | 54 min |
| Sep 5, 1:14 AM CDT | Mesoscale Discussion | SPC | Allamakee, Audubon, Benton, Black Hawk, Boone, Bremer and 54 more | 91 min |
| Sep 5, 3:43 AM CDT | Mesoscale Discussion | SPC | Benton, Cedar, Clinton, Des Moines, Dubuque, Henry and 14 more | 92 min |
| Sep 6, 9:33 PM CDT | Mesoscale Discussion | SPC | Audubon, Boone, Buena Vista, Butler, Calhoun, Carroll and 25 more | 117 min |
| Sep 6, 11:56 PM CDT | Mesoscale Discussion | SPC | Audubon, Black Hawk, Boone, Buena Vista, Calhoun, Carroll and 33 more | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Grundy County5
- Buena Vista County5
- Allamakee County4
- Bremer County4
- Chickasaw County4
- Clayton County4
- Delaware County4
- Fayette County4
- Howard County4
- Winneshiek County4
- Black Hawk County4
- Butler County4
- Dubuque County4
- Clay County4
- Calhoun County4
- Franklin County4
- Hamilton County4
- Hancock County4
- Humboldt County4
- Pocahontas County4
- Sac County4
- Webster County4
- Wright County4
- Buchanan County3
- Floyd County3
- Cherokee County3
- O'Brien County3
- Cerro Gordo County3
- Kossuth County3
- Palo Alto County3
- Audubon County3
- Boone County3
- Carroll County3
- Crawford County3
- Dallas County3
- Greene County3
- Guthrie County3
- Hardin County3
- Ida County3
- Iowa County3
40 more counties
- Jasper County3
- Keokuk County3
- Mahaska County3
- Marshall County3
- Polk County3
- Poweshiek County3
- Story County3
- Mitchell County2
- Dickinson County2
- Winnebago County2
- Worth County2
- Benton County2
- Cedar County2
- Clinton County2
- Jackson County2
- Johnson County2
- Jones County2
- Linn County2
- Louisa County2
- Marion County2
- Muscatine County2
- Scott County2
- Tama County2
- Washington County2
- Harrison County1
- Monona County1
- Lyon County1
- Osceola County1
- Plymouth County1
- Sioux County1
- Emmet County1
- Shelby County1
- Des Moines County1
- Henry County1
- Jefferson County1
- Wapello County1
- Lucas County1
- Madison County1
- Monroe County1
- Warren County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20112013
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.