Alert archive / Illinois / Mesoscale Discussions / 2017

Mesoscale Discussions in Illinois, July 2017

23 mesoscale discussions in July 2017. 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 2017. Tap one for its archive.

Mesoscale Discussions
23
Busiest day
July 23, 20175 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, 12:19 PM CDTMesoscale DiscussionSPCChampaign, Clark, Clay, Coles, Crawford, Cumberland and 14 more56 min
Jul 10, 1:49 AM CDTMesoscale DiscussionSPCBureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 5 more116 min
Jul 10, 6:46 AM CDTMesoscale DiscussionSPCChampaign, Coles, DeWitt, Douglas, Edgar, Ford and 17 more119 min
Jul 10, 2:48 PM CDTMesoscale DiscussionSPCBureau, Ford, Grundy, Iroquois, Kankakee, LaSalle and 8 more117 min
Jul 10, 6:18 PM CDTMesoscale DiscussionSPCBureau, Champaign, DeWitt, Ford, Fulton, Grundy and 21 more87 min
Jul 10, 8:56 PM CDTMesoscale DiscussionSPCBureau, Cass, Champaign, Christian, Clark, Coles and 41 more2 hr
Jul 11, 10:16 AM CDTMesoscale DiscussionSPCDouglas, Edgar, Vermilion29 min
Jul 11, 9:49 PM CDTMesoscale DiscussionSPCBoone, DeKalb, Jo Daviess, Kane, McHenry, Ogle and 2 more116 min
Jul 12, 8:33 AM CDTMesoscale DiscussionSPCCook, DuPage117 min
Jul 16, 2:06 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 36 more54 min
Jul 19, 5:11 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, DeKalb, Jo Daviess, Lee and 5 more34 min
Jul 19, 8:19 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 10 more86 min
Jul 21, 1:11 AM CDTMesoscale DiscussionSPCBureau, Ford, Grundy, Iroquois, Kankakee, LaSalle and 7 more94 min
Jul 21, 1:32 PM CDTMesoscale DiscussionSPCCarroll, Henry, Jo Daviess, Lee, Mercer, Ogle and 2 more2 hr
Jul 21, 6:28 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more92 min
Jul 21, 8:35 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more115 min
Jul 21, 11:23 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more67 min
Jul 22, 7:11 PM CDTMesoscale DiscussionSPCChristian, Clark, Coles, Crawford, Cumberland, Douglas and 10 more94 min
Jul 22, 11:48 PM CDTMesoscale DiscussionSPCCalhoun, Pike87 min
Jul 23, 3:12 AM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clay, Clinton, Edwards and 23 more2 hr
Jul 23, 5:23 AM CDTMesoscale DiscussionSPCClay, Crawford, Edwards, Effingham, Hamilton, Jasper and 5 more2 hr
Jul 23, 1:03 PM CDTMesoscale DiscussionSPCBoone, Bureau, Champaign, Cook, DeKalb, Douglas and 23 more2 hr
Jul 26, 4:55 PM CDTMesoscale DiscussionSPCBrown, Bureau, Carroll, Cass, Champaign, Christian and 42 more65 min

By county

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

51 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20162018

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.