Mesoscale Discussions in Iowa
4,275 mesoscale discussions since 1986. 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 since 1986. Tap one for its archive.
- Mesoscale Discussions
- 4,275
- Busiest year
- 2010259 mesoscale discussions
- Average year
- 178over 24 years on file
Over time
By year
Mesoscale discussions are counted from 2003.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Montgomery County935
- Page County924
- Cass County920
- Adams County917
- Fremont County912
- Mills County900
- Pottawattamie County897
- Union County897
- Taylor County894
- Adair County885
- Audubon County879
- Ringgold County877
- Shelby County877
- Guthrie County874
- Polk County871
- Warren County866
- Madison County864
- Carroll County861
- Marion County860
- Harrison County859
- Jasper County857
- Dallas County854
- Clarke County851
- Greene County844
- Boone County842
- Poweshiek County834
- Lucas County832
- Crawford County831
- Monroe County828
- Story County825
- Mahaska County824
- Decatur County823
- Monona County822
- Marshall County807
- Sac County806
- Johnson County803
- Wayne County802
- Calhoun County797
- Tama County797
- Wapello County797
59 more counties
- Ida County793
- Appanoose County792
- Muscatine County792
- Henry County791
- Cedar County790
- Linn County783
- Scott County782
- Louisa County781
- Hardin County780
- Webster County780
- Buena Vista County778
- Pocahontas County776
- Iowa County775
- Woodbury County774
- Hamilton County773
- Jones County772
- Washington County772
- Chickasaw County770
- Jefferson County770
- Grundy County769
- Keokuk County769
- Clinton County767
- Davis County766
- Humboldt County766
- Cherokee County764
- O'Brien County762
- Franklin County761
- Des Moines County759
- Bremer County758
- Delaware County757
- Black Hawk County756
- Clay County756
- Sioux County754
- Benton County753
- Floyd County751
- Plymouth County750
- Buchanan County748
- Butler County745
- Jackson County745
- Cerro Gordo County744
- Wright County744
- Fayette County743
- Winneshiek County743
- Palo Alto County740
- Howard County737
- Van Buren County737
- Worth County737
- Mitchell County733
- Osceola County729
- Kossuth County727
- Allamakee County726
- Hancock County724
- Clayton County723
- Dickinson County720
- Emmet County717
- Lyon County710
- Dubuque County709
- Winnebago County707
- Lee County703
The latest mesoscale discussions
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 19, 7:05 PM CDT | Mesoscale Discussion | SPC | Decatur, Ringgold | 85 min |
| Sep 15, 2:35 PM CDT | Mesoscale Discussion | SPC | Lee | 115 min |
| Sep 14, 9:11 PM CDT | Mesoscale Discussion | SPC | Benton, Black Hawk, Grundy, Hardin, Iowa, Jasper and 12 more | 64 min |
| Sep 14, 7:20 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Clarke, Dallas and 10 more | 55 min |
| Sep 14, 6:32 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cerro Gordo, Crawford, Franklin, Hancock and 10 more | 58 min |
| Sep 14, 6:18 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Clarke, Dallas and 14 more | 57 min |
| Sep 14, 3:23 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Carroll, Cass, Crawford and 11 more | 2 hr |
| Sep 11, 8:36 PM CDT | Mesoscale Discussion | SPC | Lyon, Sioux | 114 min |
| Sep 8, 7:33 PM CDT | Mesoscale Discussion | SPC | Cedar, Des Moines, Henry, Iowa, Jefferson, Johnson and 9 more | 117 min |
| Sep 8, 2:49 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Benton, Black Hawk, Boone and 38 more | 116 min |
| Sep 6, 2:45 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Carroll, Cass, Crawford and 11 more | 2 hr |
| Sep 5, 12:48 AM CDT | Mesoscale Discussion | SPC | Lyon | 117 min |
Nearby
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. Rebuilt daily.