Alert archive / Illinois / Mesoscale Discussions / 2026
Mesoscale Discussions in Illinois, March 2026
34 mesoscale discussions in March 2026. 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 March 2026. Tap one for its archive.
- Mesoscale Discussions
- 34
- Busiest day
- March 11, 20267 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 |
|---|---|---|---|---|
| Mar 4, 1:28 PM CST | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more | 3 hr |
| Mar 4, 5:30 PM CST | Mesoscale Discussion | SPC | Alexander, Clay, Crawford, Edwards, Franklin, Gallatin and 20 more | 2 hr |
| Mar 4, 10:51 PM CST | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 3 more | 114 min |
| Mar 6, 2:10 PM CST | Mesoscale Discussion | SPC | Cook, DuPage, Grundy, Iroquois, Kane, Kankakee and 4 more | 2 hr |
| Mar 7, 2:44 AM CST | Mesoscale Discussion | SPC | Alexander, Bond, Clark, Clay, Clinton, Coles and 30 more | 2 hr |
| Mar 7, 5:40 AM CST | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more | 2 hr |
| Mar 10, 11:16 AM CDT | Mesoscale Discussion | SPC | Bureau, Ford, Fulton, Grundy, Iroquois, Kankakee and 11 more | 29 min |
| Mar 10, 1:53 PM CDT | Mesoscale Discussion | SPC | Bureau, Ford, Fulton, Grundy, Hancock, Henderson and 20 more | 3 hr |
| Mar 10, 4:53 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 12 more | 97 min |
| Mar 10, 5:41 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Greene, Hancock, McDonough and 3 more | 2 hr |
| Mar 10, 6:27 PM CDT | Mesoscale Discussion | SPC | Kankakee | 63 min |
| Mar 10, 7:21 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 18 more | 84 min |
| Mar 10, 7:51 PM CDT | Mesoscale Discussion | SPC | Ford, Fulton, Grundy, Hancock, Henderson, Iroquois and 16 more | 54 min |
| Mar 10, 10:01 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, DeWitt, Fulton, Hancock and 18 more | 89 min |
| Mar 11, 1:59 AM CDT | Mesoscale Discussion | SPC | Brown, Calhoun, Cass, Champaign, Christian, Coles and 17 more | 91 min |
| Mar 11, 4:23 AM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clark, Clay, Clinton, Coles and 21 more | 2 hr |
| Mar 11, 7:49 AM CDT | Mesoscale Discussion | SPC | Wabash | 86 min |
| Mar 11, 1:36 PM CDT | Mesoscale Discussion | SPC | Edwards, Lawrence, Wabash | 84 min |
| Mar 15, 12:23 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Greene, Jackson, Jersey and 13 more | 2 hr |
| Mar 15, 3:27 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more | 93 min |
| Mar 15, 5:16 PM CDT | Mesoscale Discussion | SPC | Iroquois, Kankakee | 59 min |
| Mar 15, 5:47 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Clark, Clay, Clinton, Coles and 22 more | 88 min |
| Mar 15, 6:43 PM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski, Union | 2 hr |
| Mar 22, 3:50 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Douglas and 9 more | 2 hr |
| Mar 22, 7:20 PM CDT | Mesoscale Discussion | SPC | Clark, Clay, Coles, Crawford, Cumberland, Edgar and 6 more | 85 min |
| Mar 26, 2:48 PM CDT | Mesoscale Discussion | SPC | Brown, Cass, Champaign, Christian, Clark, Coles and 36 more | 117 min |
| Mar 26, 7:21 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Champaign, Christian, DeWitt and 22 more | 54 min |
| Mar 26, 10:27 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Cass, Champaign, Christian, Clark and 20 more | 63 min |
| Mar 30, 8:57 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, DuPage, Jo Daviess, Kane and 7 more | 2 hr |
| Mar 30, 11:29 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 13 more | 2 hr |
| Mar 31, 1:54 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 18 more | 96 min |
| Mar 31, 7:46 AM CDT | Mesoscale Discussion | SPC | Bureau, Grundy, Henderson, Henry, Kendall, Knox and 10 more | 89 min |
| Mar 31, 10:55 AM CDT | Mesoscale Discussion | SPC | Coles, Douglas, Edgar, Vermilion | 2 hr |
| Mar 31, 2:44 PM CDT | Mesoscale Discussion | SPC | Brown, Cass, Champaign, Christian, Coles, DeWitt and 31 more | 3 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Coles County10
- Douglas County10
- Edgar County10
- Union County8
- Wabash County8
- Grundy County8
- Kankakee County8
- LaSalle County8
- Livingston County8
- Will County8
- Moultrie County8
- Shelby County8
- Marshall County8
- Peoria County8
- Putnam County8
- Stark County8
- Woodford County8
- Alexander County7
- Edwards County7
- Jackson County7
- Perry County7
- Wayne County7
- Crawford County7
- Lawrence County7
- Iroquois County7
- Kendall County7
- Clark County7
- Cumberland County7
- Jasper County7
- Macon County7
- Bureau County7
- Fulton County7
- McLean County7
- Tazewell County7
- McDonough County7
- Mason County7
- Rock Island County7
- Brown County7
- Scott County7
- Morgan County7
62 more counties
- Piatt County7
- Vermilion County7
- Franklin County6
- Hamilton County6
- Johnson County6
- Massac County6
- Pulaski County6
- Saline County6
- Washington County6
- Williamson County6
- Clay County6
- Richland County6
- DuPage County6
- Kane County6
- Ford County6
- Knox County6
- Schuyler County6
- Cass County6
- DeWitt County6
- Logan County6
- Menard County6
- Champaign County6
- Christian County6
- Sangamon County6
- Gallatin County5
- Hardin County5
- Jefferson County5
- Pope County5
- Randolph County5
- White County5
- Cook County5
- Effingham County5
- Hancock County5
- Henry County5
- Mercer County5
- Boone County5
- Carroll County5
- DeKalb County5
- Lee County5
- McHenry County5
- Ogle County5
- Stephenson County5
- Whiteside County5
- Winnebago County5
- Greene County5
- Pike County5
- Montgomery County5
- Marion County4
- Bond County4
- Clinton County4
- Fayette County4
- Henderson County4
- Warren County4
- Jo Daviess County4
- Lake County4
- Adams County4
- Macoupin County4
- Saint Clair County3
- Calhoun County3
- Monroe County2
- Jersey County2
- Madison County1
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. Warning verification from the Mesonet's Cow. Rebuilt daily.