Alert archive / Illinois / Mesoscale Discussions / 2017

Mesoscale Discussions in Illinois, May 2017

22 mesoscale discussions in May 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 May 2017. Tap one for its archive.

Mesoscale Discussions
22
Busiest day
May 10, 20173 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 10, 12:05 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, DeWitt, Ford and 19 more2 hr
May 10, 3:48 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, DeWitt and 28 more87 min
May 10, 6:26 PM CDTMesoscale DiscussionSPCChampaign, Christian, Clark, Coles, Cumberland, DeWitt and 11 more94 min
May 10, 9:42 PM CDTMesoscale DiscussionSPCClark, Crawford, Cumberland, Effingham, Jasper63 min
May 11, 12:58 PM CDTMesoscale DiscussionSPCGallatin, Hamilton, Hardin, Johnson, Massac, Pope and 4 more3 hr
May 15, 5:52 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 9 more113 min
May 15, 7:19 PM CDTMesoscale DiscussionSPCBoone, Carroll, DeKalb, Jo Daviess, Kane, Lee and 5 more56 min
May 15, 10:14 PM CDTMesoscale DiscussionSPCBoone, DeKalb, DuPage, Kane, Kendall, Lake and 2 more61 min
May 17, 3:24 PM CDTMesoscale DiscussionSPCCarroll, Hancock, Henderson, Henry, Jo Daviess, Knox and 7 more66 min
May 17, 9:45 PM CDTMesoscale DiscussionSPCDuPage, Grundy, Kane, Kendall, Lake, McHenry and 1 more60 min
May 19, 4:07 AM CDTMesoscale DiscussionSPCBond, Calhoun, Clinton, Fayette, Greene, Jersey and 8 more113 min
May 19, 6:30 AM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Crawford, Cumberland, Effingham and 9 more90 min
May 19, 6:04 PM CDTMesoscale DiscussionSPCCalhoun86 min
May 20, 1:45 AM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Hamilton, Jackson, Jefferson and 10 more90 min
May 26, 1:25 PM CDTMesoscale DiscussionSPCChampaign, Coles, DeWitt, Douglas, Edgar, Ford and 8 more3 hr
May 26, 4:31 PM CDTMesoscale DiscussionSPCChampaign, DeWitt, Ford, Fulton, Iroquois, Kankakee and 12 more59 min
May 26, 6:30 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Cumberland, Douglas, Edgar and 3 more90 min
May 27, 3:54 AM CDTMesoscale DiscussionSPCAlexander2 hr
May 27, 1:16 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more59 min
May 27, 3:50 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more85 min
May 28, 12:16 PM CDTMesoscale DiscussionSPCChampaign, Douglas, Ford, Iroquois, Vermilion119 min
May 28, 3:09 PM CDTMesoscale DiscussionSPCEdgar66 min

By county

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

59 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. Rebuilt daily.