Mesoscale Discussions in Illinois
4,691 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
- 4,691
- Busiest year
- 2006282 mesoscale discussions
- Average year
- 195over 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.
- Union County886
- Williamson County873
- Alexander County868
- Johnson County868
- Franklin County867
- Hamilton County867
- Jackson County861
- Pulaski County861
- Saline County861
- Jefferson County855
- DeWitt County854
- Tazewell County853
- Perry County850
- Moultrie County845
- Washington County844
- Coles County842
- Douglas County842
- Randolph County842
- White County842
- Shelby County841
- Logan County839
- Macon County839
- Massac County839
- Piatt County839
- Bond County838
- LaSalle County838
- Kendall County834
- Madison County834
- Mason County834
- Marshall County830
- Ford County829
- McLean County828
- Woodford County827
- Saint Clair County826
- Grundy County825
- Pope County825
- Knox County824
- Monroe County824
- Putnam County823
- Champaign County822
62 more counties
- Christian County822
- Peoria County822
- Effingham County821
- Clay County820
- Cumberland County820
- DeKalb County820
- Lee County820
- Marion County820
- Clinton County819
- Stark County819
- Wayne County818
- Gallatin County816
- Jasper County816
- Menard County816
- Edgar County815
- Fulton County814
- Edwards County813
- Iroquois County813
- Livingston County812
- Bureau County809
- Sangamon County808
- Hardin County807
- Fayette County806
- Jersey County806
- Kane County805
- Richland County805
- Montgomery County803
- Morgan County799
- Macoupin County798
- Cass County796
- Whiteside County794
- Clark County792
- Ogle County790
- Crawford County785
- Henry County784
- Will County782
- Vermilion County780
- Calhoun County779
- Rock Island County779
- Wabash County779
- Carroll County778
- Kankakee County778
- DuPage County773
- Warren County773
- Scott County771
- Brown County769
- Greene County767
- Lawrence County766
- Mercer County766
- Schuyler County759
- Boone County751
- Pike County751
- Henderson County748
- Stephenson County745
- Winnebago County743
- McDonough County740
- Adams County731
- McHenry County726
- Jo Daviess County717
- Hancock County712
- Cook County627
- Lake County600
The latest mesoscale discussions
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 6:38 PM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clark, Clay, Clinton, Coles and 33 more | 2 hr |
| Sep 15, 2:35 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 40 more | 115 min |
| Sep 10, 2:15 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 2 hr |
| Sep 8, 7:33 PM CDT | Mesoscale Discussion | SPC | Mercer, Rock Island | 117 min |
| Sep 5, 3:01 PM CDT | Mesoscale Discussion | SPC | Clark, Coles, Crawford, Cumberland, Edgar, Edwards and 4 more | 119 min |
| Sep 4, 9:01 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 1 more | 3 hr |
| Aug 26, 12:22 PM CDT | Mesoscale Discussion | SPC | Champaign, Douglas, Edgar, Ford, Iroquois, Kankakee and 2 more | 113 min |
| Aug 21, 11:43 PM CDT | Mesoscale Discussion | SPC | Cass, Champaign, DeWitt, Logan, McLean, Macon and 3 more | 92 min |
| Aug 21, 6:13 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Kane, Kendall and 8 more | 2 hr |
| Aug 21, 2:22 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Fulton, Grundy and 23 more | 113 min |
| Aug 20, 1:49 AM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 86 min |
| Aug 19, 11:04 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pope, Pulaski | 86 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.