Alert archive / Illinois / Mesoscale Discussions / 2024

Mesoscale Discussions in Illinois, May 2024

47 mesoscale discussions in May 2024. 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 May 2024. Tap one for its archive.

Mesoscale Discussions
47
Busiest day
May 8, 20248 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
May 2, 3:07 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Grundy, Iroquois and 13 more113 min
May 4, 1:56 PM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 40 more94 min
May 4, 3:53 PM CDTMesoscale DiscussionSPCMonroe97 min
May 6, 11:56 PM CDTMesoscale DiscussionSPCAdams, Calhoun, Hancock, Pike94 min
May 7, 2:29 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Pike2 hr
May 7, 4:42 AM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Cass, Christian, Clay and 38 more2 hr
May 7, 12:14 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Cook, DeKalb, DeWitt and 23 more2 hr
May 7, 2:53 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 16 more67 min
May 7, 5:24 PM CDTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Knox, Mercer, Rock Island and 2 more96 min
May 7, 6:36 PM CDTMesoscale DiscussionSPCGallatin, Hardin, Pope, Saline, White54 min
May 7, 9:20 PM CDTMesoscale DiscussionSPCCrawford, Edwards, Lawrence, Wabash55 min
May 7, 11:16 PM CDTMesoscale DiscussionSPCGallatin, Hamilton, Hardin, Pope, Saline, Wabash and 1 more119 min
May 8, 1:26 AM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 2 more2 hr
May 8, 11:28 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 9 more92 min
May 8, 11:35 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 9 more85 min
May 8, 12:58 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Hardin, Jefferson and 10 more62 min
May 8, 1:50 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 12 more55 min
May 8, 3:41 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more94 min
May 8, 10:34 PM CDTMesoscale DiscussionSPCAlexander, Hardin, Jackson, Johnson, Massac, Pope and 3 more86 min
May 16, 3:25 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 6 more2 hr
May 20, 10:13 AM CDTMesoscale DiscussionSPCBoone, Bureau, Cook, DeKalb, DuPage, Grundy and 10 more92 min
May 20, 3:21 PM CDTMesoscale DiscussionSPCCook114 min
May 21, 9:29 AM CDTMesoscale DiscussionSPCMercer, Rock Island91 min
May 21, 12:32 PM CDTMesoscale DiscussionSPCMercer, Rock Island118 min
May 21, 3:54 PM CDTMesoscale DiscussionSPCAdams, Brown, Pike, Schuyler, Scott2 hr
May 21, 5:33 PM CDTMesoscale DiscussionSPCAdams, Brown, Pike117 min
May 21, 7:55 PM CDTMesoscale DiscussionSPCAdams2 hr
May 21, 7:56 PM CDTMesoscale DiscussionSPCBoone, McHenry, Stephenson, Winnebago64 min
May 24, 8:44 AM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Jo Daviess, Kane and 9 more2 hr
May 24, 11:57 AM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Hancock and 5 more2 hr
May 24, 1:39 PM CDTMesoscale DiscussionSPCBond, Christian, Clark, Coles, Cumberland, Douglas and 12 more2 hr
May 24, 3:57 PM CDTMesoscale DiscussionSPCBond, Brown, Calhoun, Cass, Christian, Clay and 34 more93 min
May 24, 4:46 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 15 more119 min
May 24, 6:19 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clinton, Effingham, Fayette and 10 more116 min
May 24, 8:49 PM CDTMesoscale DiscussionSPCMonroe, Randolph, Saint Clair86 min
May 26, 7:50 AM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more115 min
May 26, 2:38 PM CDTMesoscale DiscussionSPCAlexander, Jackson, Johnson, Massac, Pulaski, Randolph and 2 more3 hr
May 26, 2:46 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more59 min
May 26, 3:26 PM CDTMesoscale DiscussionSPCBoone, DeKalb, DuPage, Kane, Kendall, Lake and 2 more94 min
May 26, 5:38 PM CDTMesoscale DiscussionSPCBond, Christian, Clark, Clay, Coles, Crawford and 14 more67 min
May 26, 5:53 PM CDTMesoscale DiscussionSPCMcHenry67 min
May 26, 6:18 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 11 more87 min
May 26, 6:57 PM CDTMesoscale DiscussionSPCAlexander63 min
May 26, 7:01 PM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Effingham, Fayette, Franklin and 11 more89 min
May 26, 8:21 PM CDTMesoscale DiscussionSPCAlexander, Clay, Crawford, Cumberland, Edwards, Franklin and 18 more84 min
May 27, 5:10 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Carroll, Cass, DeKalb and 31 more2 hr
May 28, 1:02 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, DuPage, Jo Daviess, Kane and 8 more3 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 archive20232025

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.