Alert archive / Illinois / Mesoscale Discussions / 2018

Mesoscale Discussions in Illinois, July 2018

12 mesoscale discussions in July 2018. 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 2018. Tap one for its archive.

Mesoscale Discussions
12
Busiest day
July 1, 20184 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 1, 11:37 AM CDTMesoscale DiscussionSPCBoone, Jo Daviess, McHenry, Stephenson, Winnebago83 min
Jul 1, 12:23 PM CDTMesoscale DiscussionSPCAdams, Bond, Boone, Brown, Bureau, Carroll and 56 more97 min
Jul 1, 3:37 PM CDTMesoscale DiscussionSPCBond, Boone, Cass, Champaign, Christian, Clark and 46 more83 min
Jul 1, 6:51 PM CDTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Clinton and 22 more114 min
Jul 13, 6:23 PM CDTMesoscale DiscussionSPCCarroll, Jo Daviess, Stephenson, Winnebago2 hr
Jul 14, 4:40 PM CDTMesoscale DiscussionSPCBond, Cass, Christian, Clinton, DeWitt, Fayette and 23 more95 min
Jul 19, 5:18 PM CDTMesoscale DiscussionSPCHancock, Henderson, McDonough, Mercer, Rock Island, Warren57 min
Jul 19, 6:26 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 31 more64 min
Jul 19, 9:36 PM CDTMesoscale DiscussionSPCAdams, Bond, Brown, Calhoun, Cass, Christian and 23 more54 min
Jul 19, 11:43 PM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Cumberland, Edwards, Effingham and 13 more92 min
Jul 20, 12:58 PM CDTMesoscale DiscussionSPCAlexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more62 min
Jul 20, 10:20 PM CDTMesoscale DiscussionSPCAlexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 8 more115 min

By county

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

57 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20172019

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.