Alert archive / Illinois / Mesoscale Discussions / 2015

Mesoscale Discussions in Illinois, December 2015

10 mesoscale discussions in December 2015. 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 December 2015. Tap one for its archive.

Mesoscale Discussions
10
Busiest day
December 23, 20157 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
Dec 23, 6:13 AM CSTMesoscale DiscussionSPCAlexander, Bond, Clinton, Franklin, Gallatin, Hamilton and 17 more2 hr
Dec 23, 9:05 AM CSTMesoscale DiscussionSPCAlexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 20 more85 min
Dec 23, 9:41 AM CSTMesoscale DiscussionSPCCook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more2 hr
Dec 23, 10:29 AM CSTMesoscale DiscussionSPCAlexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more91 min
Dec 23, 12:06 PM CSTMesoscale DiscussionSPCClay, Crawford, Edwards, Gallatin, Hamilton, Hardin and 7 more84 min
Dec 23, 12:42 PM CSTMesoscale DiscussionSPCAdams, Brown, Bureau, Calhoun, Cass, Fulton and 25 more2 hr
Dec 23, 3:24 PM CSTMesoscale DiscussionSPCAdams, Brown, Bureau, Calhoun, Cass, Fulton and 26 more96 min
Dec 28, 5:26 AM CSTMesoscale DiscussionSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more4 hr
Dec 28, 12:13 PM CSTMesoscale DiscussionSPCBoone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more5 hr
Dec 28, 6:00 PM CSTMesoscale DiscussionSPCBoone, McHenry, Stephenson, Winnebago5 hr

By county

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

44 more counties

Nearby

Alerts in force nowTornadoes on recordThe radar archive20142016

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.