Alert archive / Illinois / Mesoscale Discussions / 2025

Mesoscale Discussions in Illinois, May 2025

19 mesoscale discussions in May 2025. 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 2025. Tap one for its archive.

Mesoscale Discussions
19
Busiest day
May 16, 20259 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 1, 6:19 PM CDTMesoscale DiscussionSPCAlexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 19 more116 min
May 8, 11:10 AM CDTMesoscale DiscussionSPCMassac, Pulaski95 min
May 15, 2:14 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, Jo Daviess, Lee, McHenry and 4 more2 hr
May 15, 3:07 PM CDTMesoscale DiscussionSPCMassac, Pulaski83 min
May 15, 3:22 PM CDTMesoscale DiscussionSPCBureau, Christian, DeKalb, DeWitt, Ford, Grundy and 21 more113 min
May 15, 7:36 PM CDTMesoscale DiscussionSPCChampaign, Christian, DeWitt, Douglas, DuPage, Ford and 14 more54 min
May 16, 1:46 AM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more119 min
May 16, 5:32 AM CDTMesoscale DiscussionSPCAlexander, Hardin, Johnson, Massac, Pope, Pulaski58 min
May 16, 6:35 AM CDTMesoscale DiscussionSPCAlexander, Hardin, Massac, Pope, Pulaski115 min
May 16, 7:40 AM CDTMesoscale DiscussionSPCMassac2 hr
May 16, 11:41 AM CDTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Madison, Monroe, Randolph and 1 more3 hr
May 16, 2:08 PM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Clinton, Franklin, Gallatin and 21 more2 hr
May 16, 5:06 PM CDTMesoscale DiscussionSPCAlexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 14 more114 min
May 16, 6:56 PM CDTMesoscale DiscussionSPCAlexander, Clark, Clay, Crawford, Edwards, Franklin and 17 more2 hr
May 19, 7:36 PM CDTMesoscale DiscussionSPCCalhoun, Jersey, Monroe, Randolph, Saint Clair2 hr
May 19, 10:42 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Jackson, Jersey, Madison and 5 more2 hr
May 20, 1:07 AM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Crawford, Edwards and 27 more83 min
May 20, 1:44 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Crawford, Cumberland and 15 more106 min
May 20, 5:51 PM CDTMesoscale DiscussionSPCVermilion54 min

By county

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

44 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20242026

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.