Alert archive / Illinois / Mesoscale Discussions / 2026
Mesoscale Discussions in Illinois, July 2026
37 mesoscale discussions in July 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 July 2026. Tap one for its archive.
- Mesoscale Discussions
- 37
- Busiest day
- July 27, 20266 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 |
|---|---|---|---|---|
| Jul 1, 2:34 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, Henry, Jo Daviess, Kane and 8 more | 116 min |
| Jul 2, 1:10 PM CDT | Mesoscale Discussion | SPC | Jo Daviess | 95 min |
| Jul 2, 2:30 PM CDT | Mesoscale Discussion | SPC | Boone, Jo Daviess, Lake, McHenry, Stephenson, Winnebago | 90 min |
| Jul 2, 5:42 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Rock Island, Stephenson, Whiteside | 2 hr |
| Jul 2, 6:32 PM CDT | Mesoscale Discussion | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski | 118 min |
| Jul 2, 7:40 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 6 more | 2 hr |
| Jul 2, 11:43 PM CDT | Mesoscale Discussion | SPC | Bureau, Cook, DeKalb, DuPage, Grundy, Henry and 11 more | 2 hr |
| Jul 3, 11:15 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 27 more | 2 hr |
| Jul 3, 1:20 PM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Kane, Lake | 55 min |
| Jul 3, 5:05 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 19 more | 115 min |
| Jul 3, 8:33 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Cook, DeKalb, DuPage, Grundy and 18 more | 117 min |
| Jul 4, 11:24 AM CDT | Mesoscale Discussion | SPC | Champaign, DeKalb, DeWitt, Douglas, Edgar, Ford and 16 more | 3 hr |
| Jul 4, 2:36 PM CDT | Mesoscale Discussion | SPC | Madison, Monroe, Randolph, Saint Clair | 114 min |
| Jul 4, 3:51 PM CDT | Mesoscale Discussion | SPC | Champaign, Coles, Cook, DeWitt, Douglas, DuPage and 13 more | 84 min |
| Jul 4, 4:56 PM CDT | Mesoscale Discussion | SPC | Bond, Clay, Clinton, Crawford, Edwards, Effingham and 24 more | 2 hr |
| Jul 9, 12:42 PM CDT | Mesoscale Discussion | SPC | Gallatin, Hamilton, Hardin, Johnson, Massac, Pope and 3 more | 2 hr |
| Jul 9, 11:12 PM CDT | Mesoscale Discussion | SPC | Alexander, Pulaski, Union | 93 min |
| Jul 10, 4:46 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clinton, Fayette, Franklin, Jackson and 14 more | 119 min |
| Jul 10, 7:26 PM CDT | Mesoscale Discussion | SPC | Alexander, Clinton, Franklin, Gallatin, Hamilton, Hardin and 15 more | 94 min |
| Jul 10, 11:01 PM CDT | Mesoscale Discussion | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more | 119 min |
| Jul 18, 11:37 AM CDT | Mesoscale Discussion | SPC | Ford, Grundy, Iroquois, Kankakee, Kendall, Livingston and 1 more | 113 min |
| Jul 20, 11:36 AM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, McDonough, Mercer, Rock Island, Schuyler and 1 more | 114 min |
| Jul 20, 5:37 PM CDT | Mesoscale Discussion | SPC | Fulton, Henderson, Henry, Knox, McDonough, Mason and 6 more | 53 min |
| Jul 20, 8:30 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Hancock, McDonough, Schuyler | 90 min |
| Jul 21, 12:15 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hamilton, Hardin, Johnson, Massac and 7 more | 90 min |
| Jul 26, 1:52 PM CDT | Mesoscale Discussion | SPC | Bond, Cass, Christian, Clay, Clinton, Coles and 38 more | 2 hr |
| Jul 26, 4:48 PM CDT | Mesoscale Discussion | SPC | Clay, Edwards, Effingham, Fayette, Gallatin, Hamilton and 9 more | 87 min |
| Jul 26, 6:33 PM CDT | Mesoscale Discussion | SPC | Edwards, Gallatin, Hamilton, Wayne, White | 27 min |
| Jul 26, 8:51 PM CDT | Mesoscale Discussion | SPC | Massac | 54 min |
| Jul 27, 7:52 AM CDT | Mesoscale Discussion | SPC | Cook, DuPage, Lake | 113 min |
| Jul 27, 9:40 AM CDT | Mesoscale Discussion | SPC | Boone, Cook, DuPage, Kane, Lake, McHenry and 1 more | 3 hr |
| Jul 27, 12:24 PM CDT | Mesoscale Discussion | SPC | DuPage, Kankakee, Will | 96 min |
| Jul 27, 1:08 PM CDT | Mesoscale Discussion | SPC | Clark, Edgar, Iroquois, Kankakee, Vermilion | 97 min |
| Jul 27, 2:58 PM CDT | Mesoscale Discussion | SPC | DeWitt, Ford, Fulton, Livingston, Logan, McLean and 5 more | 92 min |
| Jul 27, 7:09 PM CDT | Mesoscale Discussion | SPC | Clark, Crawford, Edgar, Lawrence, Vermilion, Wabash | 96 min |
| Jul 27, 8:55 PM CDT | Mesoscale Discussion | SPC | DuPage, Kane, Kendall, Will | 95 min |
| Jul 31, 2:13 PM CDT | Mesoscale Discussion | SPC | Adams, Calhoun, Pike | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- DuPage County11
- Will County11
- Kane County9
- Lake County9
- Cook County9
- Kendall County9
- Rock Island County8
- Hardin County8
- Kankakee County8
- Gallatin County8
- Hamilton County8
- Boone County7
- DeKalb County7
- McHenry County7
- Mercer County7
- Grundy County7
- Saline County7
- Williamson County7
- Henry County6
- Lee County6
- Whiteside County6
- Johnson County6
- Massac County6
- Pope County6
- Livingston County6
- Union County6
- White County6
- Jo Daviess County5
- Ogle County5
- Stephenson County5
- Winnebago County5
- Alexander County5
- Pulaski County5
- LaSalle County5
- Putnam County5
- Stark County5
- Ford County5
- Tazewell County5
- Madison County5
- Randolph County5
61 more counties
- Franklin County5
- Jefferson County5
- Perry County5
- Wabash County5
- Carroll County4
- Bureau County4
- McLean County4
- Marshall County4
- Peoria County4
- DeWitt County4
- Edgar County4
- Iroquois County4
- Vermilion County4
- Saint Clair County4
- Clinton County4
- Edwards County4
- Fayette County4
- Jackson County4
- Marion County4
- Washington County4
- Wayne County4
- Knox County3
- Warren County3
- Woodford County3
- Logan County3
- Piatt County3
- Monroe County3
- Bond County3
- Clay County3
- Crawford County3
- Effingham County3
- Lawrence County3
- Richland County3
- Shelby County3
- McDonough County3
- Schuyler County3
- Fulton County3
- Mason County3
- Champaign County2
- Douglas County2
- Coles County2
- Macon County2
- Moultrie County2
- Jasper County2
- Calhoun County2
- Macoupin County2
- Montgomery County2
- Hancock County2
- Henderson County2
- Adams County2
- Clark County2
- Jersey County1
- Brown County1
- Cass County1
- Christian County1
- Cumberland County1
- Menard County1
- Morgan County1
- Sangamon County1
- Scott County1
- Pike 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.