Alert archive / Illinois / Mesoscale Discussions / 2026

Mesoscale Discussions in Illinois, June 2026

49 mesoscale discussions in June 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 June 2026. Tap one for its archive.

Mesoscale Discussions
49
Busiest day
June 11, 202611 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.

IssuedProductOfficeCountiesLasted
Jun 1, 4:02 AM CDTMesoscale DiscussionSPCMonroe, Saint Clair118 min
Jun 1, 6:01 AM CDTMesoscale DiscussionSPCAlexander, Clinton, Franklin, Gallatin, Hamilton, Hardin and 15 more2 hr
Jun 6, 5:39 AM CDTMesoscale DiscussionSPCChampaign, Ford, Grundy, Iroquois, Kankakee, Livingston and 3 more2 hr
Jun 6, 2:06 PM CDTMesoscale DiscussionSPCIroquois, Kankakee, Vermilion114 min
Jun 8, 12:58 PM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Ford, Grundy, Henry and 16 more92 min
Jun 8, 1:39 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 23 more2 hr
Jun 9, 12:42 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Crawford, Edwards and 30 more93 min
Jun 9, 7:05 PM CDTMesoscale DiscussionSPCClark115 min
Jun 10, 7:43 AM CDTMesoscale DiscussionSPCHenderson2 hr
Jun 10, 11:09 AM CDTMesoscale DiscussionSPCAdams, Brown, Carroll, Fulton, Hancock, Henderson and 13 more2 hr
Jun 10, 1:00 PM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, Lee, McHenry, Ogle and 3 more2 hr
Jun 10, 2:06 PM CDTMesoscale DiscussionSPCBureau, Cass, Champaign, Christian, Cook, DeKalb and 35 more54 min
Jun 10, 3:58 PM CDTMesoscale DiscussionSPCCook, Ford, Grundy, Iroquois, Kankakee, Lake and 2 more2 hr
Jun 10, 6:35 PM CDTMesoscale DiscussionSPCBureau, Cass, Champaign, DeWitt, Douglas, Ford and 23 more55 min
Jun 10, 7:55 PM CDTMesoscale DiscussionSPCCook, DeKalb, DuPage, Ford, Fulton, Grundy and 14 more95 min
Jun 10, 9:22 PM CDTMesoscale DiscussionSPCAdams, Brown, Fulton, Hancock, McDonough, Schuyler83 min
Jun 11, 12:00 AM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Crawford, Cumberland and 14 more90 min
Jun 11, 9:53 AM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Cass, Fulton, Hancock and 20 more97 min
Jun 11, 12:22 PM CDTMesoscale DiscussionSPCBureau, Cass, Fulton, Grundy, Kendall, Knox and 12 more83 min
Jun 11, 1:08 PM CDTMesoscale DiscussionSPCHancock, Henderson3 hr
Jun 11, 3:07 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Hancock, Henderson and 7 more113 min
Jun 11, 4:11 PM CDTMesoscale DiscussionSPCFulton, Hancock, Henderson, Henry, Knox, McDonough and 3 more94 min
Jun 11, 5:13 PM CDTMesoscale DiscussionSPCGrundy, Kankakee, LaSalle, Marshall, Will62 min
Jun 11, 6:14 PM CDTMesoscale DiscussionSPCBoone, Bureau, Cass, Cook, DeKalb, DeWitt and 27 more91 min
Jun 11, 6:38 PM CDTMesoscale DiscussionSPCChampaign, Christian, Coles, DeWitt, Douglas, Edgar and 6 more97 min
Jun 11, 8:25 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Crawford, Cumberland and 9 more65 min
Jun 13, 12:40 PM CDTMesoscale DiscussionSPCAlexander, Pulaski, Union95 min
Jun 16, 12:22 PM CDTMesoscale DiscussionSPCChampaign, Ford, Iroquois, Kankakee, McLean, Vermilion113 min
Jun 16, 4:50 PM CDTMesoscale DiscussionSPCColes, Douglas, Edgar, Moultrie85 min
Jun 17, 5:42 AM CDTMesoscale DiscussionSPCCarroll, Henderson, Henry, Jo Daviess, Knox, Mercer and 3 more2 hr
Jun 17, 8:16 AM CDTMesoscale DiscussionSPCBrown, Bureau, Cass, Champaign, Christian, Clark and 37 more59 min
Jun 17, 10:43 AM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Coles, Crawford and 19 more2 hr
Jun 17, 1:03 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Champaign, Christian and 24 more117 min
Jun 17, 4:00 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Champaign and 37 more60 min
Jun 17, 6:50 PM CDTMesoscale DiscussionSPCChristian, Clark, Coles, Crawford, Cumberland, Montgomery and 2 more115 min
Jun 17, 9:03 PM CDTMesoscale DiscussionSPCClay, Crawford, Effingham, Jasper, Lawrence, Richland87 min
Jun 21, 10:06 AM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Coles, Cumberland and 24 more114 min
Jun 21, 2:34 PM CDTMesoscale DiscussionSPCClark, Clay, Crawford, Cumberland, Edwards, Effingham and 5 more116 min
Jun 21, 4:23 PM CDTMesoscale DiscussionSPCClark, Crawford, Edgar, Lawrence97 min
Jun 21, 6:53 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 20 more97 min
Jun 24, 12:44 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Grundy and 13 more3 hr
Jun 24, 5:28 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more92 min
Jun 24, 8:06 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Grundy, Iroquois and 10 more84 min
Jun 25, 1:11 PM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Crawford, Edwards, Effingham and 18 more2 hr
Jun 26, 3:36 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more114 min
Jun 27, 9:39 AM CDTMesoscale DiscussionSPCAlexander, Johnson, Massac, Pope, Pulaski, Union3 hr
Jun 27, 3:36 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more84 min
Jun 27, 6:18 PM CDTMesoscale DiscussionSPCMassac57 min
Jun 28, 10:14 AM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Rock Island, Whiteside2 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

62 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive2025

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.