Alert archive / Illinois / Mesoscale Discussions / 2011

Mesoscale Discussions in Illinois, April 2011

50 mesoscale discussions in April 2011. 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 2011. Tap one for its archive.

Mesoscale Discussions
50
Busiest day
April 4, 20117 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
Apr 3, 4:49 PM CDTMesoscale DiscussionSPCCarroll, Henderson, Henry, Jo Daviess, Mercer, Rock Island and 2 more56 min
Apr 3, 7:44 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Fulton, Hancock, Henderson and 16 more61 min
Apr 3, 10:23 PM CDTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 10 more67 min
Apr 3, 10:50 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Hancock, McDonough and 4 more85 min
Apr 4, 1:29 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 31 more91 min
Apr 4, 1:53 AM CDTMesoscale DiscussionSPCCook, DuPage, Grundy, Kane, Kendall, Lake and 2 more97 min
Apr 4, 4:20 AM CDTMesoscale DiscussionSPCClark, Clay, Crawford, Effingham, Jasper, Lawrence and 2 more25 min
Apr 4, 6:53 AM CDTMesoscale DiscussionSPCHardin, Lawrence, Wabash2 hr
Apr 9, 4:12 AM CDTMesoscale DiscussionSPCBond, Calhoun, Cass, Christian, Clark, Clay and 31 more93 min
Apr 9, 6:41 AM CDTMesoscale DiscussionSPCEdwards, Gallatin, Hamilton, Hardin, Johnson, Lawrence and 10 more2 hr
Apr 10, 1:30 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson2 hr
Apr 10, 5:03 PM CDTMesoscale DiscussionSPCAdams, Hancock, Henderson, Henry, Knox, McDonough and 4 more57 min
Apr 10, 11:03 PM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Coles, Cook, Cumberland and 18 more87 min
Apr 11, 12:48 AM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 10 more87 min
Apr 15, 12:29 PM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Cass and 30 more61 min
Apr 15, 3:32 PM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Cass and 21 more58 min
Apr 15, 5:57 PM CDTMesoscale DiscussionSPCAlexander, Bond, Brown, Cass, Champaign, Christian and 57 more2 hr
Apr 15, 8:15 PM CDTMesoscale DiscussionSPCChampaign, Clark, Coles, Crawford, Cumberland, DeWitt and 7 more60 min
Apr 18, 11:41 PM CDTMesoscale DiscussionSPCCalhoun, Jersey94 min
Apr 19, 2:53 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 21 more67 min
Apr 19, 5:52 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 34 more83 min
Apr 19, 8:29 AM CDTMesoscale DiscussionSPCChristian, Clark, Coles, Crawford, Cumberland, Douglas and 8 more61 min
Apr 19, 12:40 PM CDTMesoscale DiscussionSPCJersey, Madison, Monroe, Saint Clair95 min
Apr 19, 5:47 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clark, Clay, Clinton and 25 more88 min
Apr 19, 6:24 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Jackson, Johnson, Pulaski, Saline and 2 more66 min
Apr 19, 8:07 PM CDTMesoscale DiscussionSPCAlexander, Bond, Champaign, Clark, Clay, Clinton and 38 more83 min
Apr 22, 10:09 AM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Clinton, Franklin, Greene and 14 more66 min
Apr 22, 1:14 PM CDTMesoscale DiscussionSPCCrawford, Edwards, Jasper, Lawrence, Richland, Wabash61 min
Apr 22, 5:21 PM CDTMesoscale DiscussionSPCCalhoun, Greene, Jersey, Macoupin114 min
Apr 22, 5:27 PM CDTMesoscale DiscussionSPCClinton, Edwards, Franklin, Gallatin, Hamilton, Hardin and 18 more33 min
Apr 22, 7:31 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 22 more59 min
Apr 22, 9:20 PM CDTMesoscale DiscussionSPCAlexander, Clay, Clinton, Edwards, Franklin, Gallatin and 23 more55 min
Apr 23, 3:41 AM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more94 min
Apr 23, 4:22 AM CDTMesoscale DiscussionSPCHardin, Pope23 min
Apr 23, 1:04 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 2 more86 min
Apr 23, 5:09 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more2 hr
Apr 23, 8:09 PM CDTMesoscale DiscussionSPCAlexander, Johnson, Pulaski, Union, Williamson2 hr
Apr 24, 3:01 PM CDTMesoscale DiscussionSPCAlexander, Hardin, Massac, Pope, Pulaski89 min
Apr 25, 4:34 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 9 more56 min
Apr 25, 7:34 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hardin, Jackson, Johnson and 7 more116 min
Apr 25, 11:05 PM CDTMesoscale DiscussionSPCGallatin, Hardin, Massac, Pope, Saline, White115 min
Apr 26, 12:26 PM CDTMesoscale DiscussionSPCChampaign, Clark, Douglas, Edgar, Ford, Iroquois and 1 more94 min
Apr 26, 2:41 PM CDTMesoscale DiscussionSPCMassac94 min
Apr 26, 4:38 PM CDTMesoscale DiscussionSPCClark, Crawford, Edwards, Gallatin, Hamilton, Jasper and 5 more37 min
Apr 26, 6:17 PM CDTMesoscale DiscussionSPCAlexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more118 min
Apr 26, 8:35 PM CDTMesoscale DiscussionSPCCrawford, Edwards, Gallatin, Lawrence, Wabash, White55 min
Apr 26, 9:13 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 5 more62 min
Apr 27, 3:06 PM CDTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 10 more54 min
Apr 27, 5:27 PM CDTMesoscale DiscussionSPCClark, Crawford, Edwards, Gallatin, Hamilton, Hardin and 7 more63 min
Apr 28, 12:38 PM CDTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Christian and 46 more97 min

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 archive20102012

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.