Alert archive / Illinois / Mesoscale Discussions / 2008

Mesoscale Discussions in Illinois, September 2008

10 mesoscale discussions in September 2008. 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 September 2008. Tap one for its archive.

Mesoscale Discussions
10
Busiest day
September 13, 20084 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
Sep 4, 12:25 PM CDTMesoscale DiscussionSPCClay, Crawford, Edwards, Franklin, Gallatin, Hamilton and 13 more2 hr
Sep 4, 6:03 PM CDTMesoscale DiscussionSPCLawrence, Wabash87 min
Sep 8, 1:22 PM CDTMesoscale DiscussionSPCBond, Clark, Clay, Clinton, Coles, Crawford and 27 more83 min
Sep 8, 9:49 PM CDTMesoscale DiscussionSPCClark, Clay, Clinton, Crawford, Cumberland, Edgar and 23 more86 min
Sep 12, 5:39 PM CDTMesoscale DiscussionSPCBond, Calhoun, Christian, Clark, Clay, Clinton and 22 more96 min
Sep 12, 11:44 PM CDTMesoscale DiscussionSPCFord, Grundy, Iroquois, Kankakee, Knox, LaSalle and 9 more91 min
Sep 13, 1:29 AM CDTMesoscale DiscussionSPCFord, Grundy, Iroquois, Kankakee, Kendall, LaSalle and 2 more91 min
Sep 13, 3:28 AM CDTMesoscale DiscussionSPCCook, DeKalb, DuPage, Ford, Grundy, Iroquois and 11 more92 min
Sep 13, 5:27 PM CDTMesoscale DiscussionSPCBrown, Calhoun, Cass, Christian, DeWitt, Greene and 13 more2 hr
Sep 29, 3:50 PM CDTMesoscale DiscussionSPCBond, Clay, Clinton, Cumberland, Edwards, Effingham and 22 more55 min

By county

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

37 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20072009

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.