Alert archive / Illinois / Mesoscale Discussions / 2009

Mesoscale Discussions in Illinois, May 2009

28 mesoscale discussions in May 2009. 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 2009. Tap one for its archive.

Mesoscale Discussions
28
Busiest day
May 8, 20096 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 7, 5:42 PM CDTMesoscale DiscussionSPCAdams, Brown, Pike, Scott2 hr
May 7, 5:56 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Champaign, Christian, Clark and 29 more64 min
May 7, 9:38 PM CDTMesoscale DiscussionSPCClinton, Franklin, Gallatin, Hamilton, Jackson, Jefferson and 13 more97 min
May 7, 11:46 PM CDTMesoscale DiscussionSPCAlexander, Bond, Clark, Clay, Clinton, Coles and 33 more89 min
May 8, 3:34 AM CDTMesoscale DiscussionSPCAlexander, Massac, Pulaski56 min
May 8, 8:37 AM CDTMesoscale DiscussionSPCAlexander, Massac, Pulaski53 min
May 8, 2:16 PM CDTMesoscale DiscussionSPCEdwards, Franklin, Gallatin, Hamilton, Jefferson, Saline and 3 more89 min
May 8, 5:47 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Henderson, Henry, Jo Daviess and 9 more58 min
May 8, 8:35 PM CDTMesoscale DiscussionSPCBoone, Bureau, Carroll, Champaign, DeKalb, DeWitt and 31 more85 min
May 13, 9:27 AM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Champaign and 54 more63 min
May 13, 1:15 PM CDTMesoscale DiscussionSPCBond, Clinton, Franklin, Jackson, Jefferson, Macoupin and 7 more30 min
May 13, 1:52 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Greene, Hancock, Jersey and 3 more23 min
May 13, 5:47 PM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 50 more88 min
May 13, 6:05 PM CDTMesoscale DiscussionSPCClark, Clay, Crawford, Edwards, Effingham, Franklin and 17 more85 min
May 13, 7:05 PM CDTMesoscale DiscussionSPCAdams, Brown, Cass, Fulton, Greene, Hancock and 15 more85 min
May 13, 8:35 PM CDTMesoscale DiscussionSPCAdams, Boone, Brown, Bureau, Carroll, Cass and 47 more85 min
May 13, 10:17 PM CDTMesoscale DiscussionSPCChampaign, Cook, DeKalb, DeWitt, Douglas, DuPage and 23 more58 min
May 13, 11:27 PM CDTMesoscale DiscussionSPCAlexander, Bond, Calhoun, Clark, Clay, Clinton and 36 more93 min
May 15, 2:05 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Coles, Cumberland, DeWitt and 23 more25 min
May 15, 3:43 PM CDTMesoscale DiscussionSPCAdams, Brown, Calhoun, Pike62 min
May 15, 5:31 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Champaign and 39 more119 min
May 15, 8:14 PM CDTMesoscale DiscussionSPCBond, Champaign, Clark, Clay, Clinton, Coles and 21 more2 hr
May 25, 12:32 PM CDTMesoscale DiscussionSPCBond, Calhoun, Clark, Clay, Clinton, Cumberland and 21 more88 min
May 27, 1:49 PM CDTMesoscale DiscussionSPCAlexander, Clark, Clay, Crawford, Edwards, Franklin and 20 more116 min
May 29, 3:17 PM CDTMesoscale DiscussionSPCBrown, Calhoun, Cass, Champaign, Christian, Coles and 22 more88 min
May 30, 2:44 PM CDTMesoscale DiscussionSPCCass, Champaign, Christian, Coles, Cumberland, DeWitt and 16 more91 min
May 30, 6:01 PM CDTMesoscale DiscussionSPCBond, Cass, Champaign, Christian, Clark, Clay and 40 more59 min
May 30, 8:53 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 16 more67 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 archive20082010

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.