Alert archive / Illinois / Mesoscale Discussions / 2021

Mesoscale Discussions in Illinois, July 2021

27 mesoscale discussions in July 2021. 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 July 2021. Tap one for its archive.

Mesoscale Discussions
27
Busiest day
July 10, 20217 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
Jul 7, 2:02 PM CDTMesoscale DiscussionSPCBoone, Bureau, Cook, DeKalb, DuPage, Ford and 30 more88 min
Jul 9, 7:54 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Jersey and 9 more36 min
Jul 9, 10:26 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Cass, Greene, Jersey and 7 more64 min
Jul 10, 1:01 AM CDTMesoscale DiscussionSPCClinton, Jackson, Monroe, Perry, Randolph, Saint Clair and 3 more59 min
Jul 10, 3:09 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Jackson, Johnson, Pulaski, Saline and 2 more2 hr
Jul 10, 1:25 PM CDTMesoscale DiscussionSPCAlexander, Clay, Clinton, Edwards, Franklin, Gallatin and 22 more2 hr
Jul 10, 3:09 PM CDTMesoscale DiscussionSPCCass, Champaign, DeWitt, Douglas, Ford, Logan and 8 more96 min
Jul 10, 5:33 PM CDTMesoscale DiscussionSPCClay, Edwards, Franklin, Gallatin, Hamilton, Hardin and 10 more87 min
Jul 12, 1:13 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 33 more92 min
Jul 14, 7:02 AM CDTMesoscale DiscussionSPCJo Daviess, Stephenson2 hr
Jul 14, 11:45 AM CDTMesoscale DiscussionSPCBoone, Carroll, Jo Daviess, McHenry, Ogle, Stephenson and 1 more2 hr
Jul 14, 2:01 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 9 more119 min
Jul 14, 5:42 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson, Winnebago63 min
Jul 14, 9:15 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Ogle, Stephenson, Winnebago90 min
Jul 14, 11:17 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, Henry, Lee, McHenry and 6 more58 min
Jul 15, 2:14 AM CDTMesoscale DiscussionSPCBoone, Bureau, DeKalb, DuPage, Grundy, Kane and 12 more61 min
Jul 15, 1:39 PM CDTMesoscale DiscussionSPCBrown, Cass, Champaign, Christian, Coles, DeWitt and 24 more2 hr
Jul 16, 12:10 PM CDTMesoscale DiscussionSPCEdwards, Wabash4 hr
Jul 24, 3:00 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more2 hr
Jul 24, 5:21 PM CDTMesoscale DiscussionSPCBureau, Cook, DuPage, Ford, Grundy, Iroquois and 12 more114 min
Jul 24, 7:31 PM CDTMesoscale DiscussionSPCDeWitt, Ford, Iroquois, McLean, Vermilion119 min
Jul 28, 12:50 AM CDTMesoscale DiscussionSPCJo Daviess55 min
Jul 29, 12:32 AM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Grundy and 11 more88 min
Jul 29, 1:34 AM CDTMesoscale DiscussionSPCBoone, Cook, DeKalb, DuPage, Kane, Kendall and 3 more86 min
Jul 29, 3:18 AM CDTMesoscale DiscussionSPCCook, DeKalb, DuPage, Grundy, Iroquois, Kankakee and 4 more87 min
Jul 29, 2:19 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 34 more116 min
Jul 31, 11:00 AM CDTMesoscale DiscussionSPCAlexander, Pulaski2 hr

By county

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

61 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20202022

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. Rebuilt daily.