Alert archive / Illinois / Mesoscale Discussions / 2023

Mesoscale Discussions in Illinois, April 2023

27 mesoscale discussions in April 2023. 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 2023. Tap one for its archive.

Mesoscale Discussions
27
Busiest day
April 20, 20236 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
Mar 31, 7:54 PM CDTMesoscale DiscussionSPCBoone, Bureau, Champaign, Clark, Coles, Cook and 29 more2 hr
Mar 31, 9:31 PM CDTMesoscale DiscussionSPCClark, Clay, Coles, Crawford, Cumberland, Douglas and 9 more119 min
Apr 4, 8:00 AM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, McHenry, Ogle, Rock Island and 3 more3 hr
Apr 4, 10:16 AM CDTMesoscale DiscussionSPCBureau, DeKalb, Henry, Kendall, LaSalle, Lee and 2 more89 min
Apr 4, 12:53 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Kane, Kendall and 2 more67 min
Apr 4, 1:49 PM CDTMesoscale DiscussionSPCFulton, Hancock, Henderson, Henry, Knox, McDonough and 5 more116 min
Apr 4, 6:18 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Greene, Hancock and 11 more87 min
Apr 4, 7:54 PM CDTMesoscale DiscussionSPCLivingston, McLean, Tazewell, Woodford96 min
Apr 5, 3:27 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Bureau, Calhoun, Cass and 48 more93 min
Apr 5, 3:48 AM CDTMesoscale DiscussionSPCJackson, Union, Williamson27 min
Apr 5, 5:19 AM CDTMesoscale DiscussionSPCCrawford, Edwards, Lawrence, Richland, Wabash86 min
Apr 5, 11:51 AM CDTMesoscale DiscussionSPCAlexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more84 min
Apr 15, 8:50 AM CDTMesoscale DiscussionSPCAlexander, Calhoun, Jackson, Jersey, Madison, Monroe and 3 more85 min
Apr 15, 11:39 AM CDTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Macoupin, Madison, Monroe and 4 more3 hr
Apr 15, 3:21 PM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Clinton, Greene, Jackson and 10 more114 min
Apr 15, 5:07 PM CDTMesoscale DiscussionSPCCalhoun, Jersey, Madison, Monroe, Saint Clair83 min
Apr 15, 6:50 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clay, Clinton, Effingham, Fayette and 20 more85 min
Apr 15, 7:56 PM CDTMesoscale DiscussionSPCChristian, Clark, Coles, Crawford, Cumberland, Douglas and 7 more94 min
Apr 15, 9:48 PM CDTMesoscale DiscussionSPCClark, Coles, Crawford, Douglas, Edgar, Edwards and 9 more87 min
Apr 19, 11:48 AM CDTMesoscale DiscussionSPCBrown, Cass, DeWitt, Fulton, LaSalle, Livingston and 15 more117 min
Apr 19, 2:42 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DeWitt, DuPage and 24 more2 hr
Apr 20, 12:25 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Hancock and 6 more2 hr
Apr 20, 1:50 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Grundy and 21 more85 min
Apr 20, 3:10 PM CDTMesoscale DiscussionSPCBond, Brown, Calhoun, Cass, Christian, Clinton and 16 more95 min
Apr 20, 3:41 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, DuPage, Fulton and 24 more94 min
Apr 20, 5:23 PM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Ford, Grundy and 18 more97 min
Apr 20, 5:36 PM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Cass, Christian, Clark and 43 more84 min

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 archive20222024

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.