Alert archive / Illinois / Mesoscale Discussions / 2026

Mesoscale Discussions in Illinois, April 2026

43 mesoscale discussions in April 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 April 2026. Tap one for its archive.

Mesoscale Discussions
43
Busiest day
April 27, 20268 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
Apr 2, 12:28 PM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Hancock, Henderson, Henry and 12 more3 hr
Apr 2, 3:41 PM CDTMesoscale DiscussionSPCAdams, Brown, Fulton, Hancock, Henderson, Henry and 6 more94 min
Apr 2, 3:48 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Jackson, Jefferson, Johnson, Perry and 6 more117 min
Apr 2, 4:26 PM CDTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more94 min
Apr 2, 5:11 PM CDTMesoscale DiscussionSPCClark, Coles, Crawford, Cumberland, Douglas, Edgar and 1 more94 min
Apr 2, 5:39 PM CDTMesoscale DiscussionSPCBond, Calhoun, Cass, Champaign, Christian, Clinton and 22 more2 hr
Apr 3, 1:26 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, DeWitt, Fulton, Hancock and 19 more2 hr
Apr 3, 4:59 PM CDTMesoscale DiscussionSPCCass, Champaign, DeWitt, Douglas, Ford, Fulton and 21 more2 hr
Apr 3, 7:24 PM CDTMesoscale DiscussionSPCDeWitt, Ford, Iroquois, Livingston, Logan, McLean and 3 more96 min
Apr 13, 11:03 AM CDTMesoscale DiscussionSPCBureau, Carroll, DeKalb, Fulton, Hancock, Henderson and 24 more87 min
Apr 13, 2:06 PM CDTMesoscale DiscussionSPCGrundy, Iroquois, Kankakee, Will24 min
Apr 14, 12:56 PM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, Ogle, Stephenson, Whiteside and 1 more2 hr
Apr 14, 1:55 PM CDTMesoscale DiscussionSPCBureau, Cass, Champaign, Christian, Clark, Coles and 31 more2 hr
Apr 14, 3:42 PM CDTMesoscale DiscussionSPCJo Daviess93 min
Apr 14, 6:36 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Ogle, Stephenson, Winnebago114 min
Apr 14, 8:32 PM CDTMesoscale DiscussionSPCBoone, McHenry, Stephenson, Winnebago88 min
Apr 14, 11:36 PM CDTMesoscale DiscussionSPCRock Island, Whiteside84 min
Apr 15, 1:47 AM CDTMesoscale DiscussionSPCMercer, Rock Island88 min
Apr 15, 4:49 PM CDTMesoscale DiscussionSPCBoone, Jo Daviess, Lake, McHenry, Ogle, Stephenson and 1 more86 min
Apr 15, 6:15 PM CDTMesoscale DiscussionSPCAdams, Brown, Carroll, Hancock, Henderson, Henry and 10 more2 hr
Apr 15, 9:26 PM CDTMesoscale DiscussionSPCBoone, Bureau, DeKalb, DuPage, Fulton, Henry and 19 more94 min
Apr 16, 3:22 PM CDTMesoscale DiscussionSPCAlexander, Jackson, Pulaski, Union113 min
Apr 17, 11:48 AM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Ogle, Stephenson, Winnebago2 hr
Apr 17, 2:05 PM CDTMesoscale DiscussionSPCJo Daviess55 min
Apr 17, 3:04 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 20 more56 min
Apr 17, 4:42 PM CDTMesoscale DiscussionSPCBoone, Lake, McHenry, Winnebago2 hr
Apr 17, 6:25 PM CDTMesoscale DiscussionSPCAdams, Boone, Bureau, Carroll, DeKalb, Fulton and 22 more2 hr
Apr 17, 8:09 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Clark, Coles, Cook and 36 more2 hr
Apr 17, 8:39 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clinton, Fayette, Greene and 6 more2 hr
Apr 17, 8:52 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Ford, Iroquois, Logan, McLean and 3 more83 min
Apr 17, 10:19 PM CDTMesoscale DiscussionSPCColes, Douglas, Edgar, Iroquois, Kankakee, Moultrie and 1 more116 min
Apr 21, 1:07 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Grundy, Kane and 7 more113 min
Apr 27, 7:36 AM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Calhoun, Clinton, Franklin and 24 more84 min
Apr 27, 9:33 AM CDTMesoscale DiscussionSPCCalhoun117 min
Apr 27, 10:31 AM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Clinton and 35 more119 min
Apr 27, 11:56 AM CDTMesoscale DiscussionSPCCalhoun, Jersey, Macoupin, Madison, Monroe, Saint Clair2 hr
Apr 27, 1:44 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more2 hr
Apr 27, 3:55 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Fayette, Greene, Jersey and 5 more2 hr
Apr 27, 3:58 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more92 min
Apr 27, 6:18 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more87 min
Apr 27, 8:08 PM CDTMesoscale DiscussionSPCBond, Champaign, Clark, Clay, Clinton, Coles and 27 more97 min
Apr 27, 8:10 PM CDTMesoscale DiscussionSPCAlexander, Pulaski, Union2 hr
Apr 27, 10:09 PM CDTMesoscale DiscussionSPCAlexander, Pulaski2 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.