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.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 23, 6:13 AM CST | Mesoscale Discussion | SPC | Alexander, Bond, Clinton, Franklin, Gallatin, Hamilton and 17 more | 2 hr |
| Dec 23, 9:05 AM CST | Mesoscale Discussion | SPC | Alexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 20 more | 85 min |
| Dec 23, 9:41 AM CST | Mesoscale Discussion | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kane and 5 more | 2 hr |
| Dec 23, 10:29 AM CST | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 15 more | 91 min |
| Dec 23, 12:06 PM CST | Mesoscale Discussion | SPC | Clay, Crawford, Edwards, Gallatin, Hamilton, Hardin and 7 more | 84 min |
| Dec 23, 12:42 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Calhoun, Cass, Fulton and 25 more | 2 hr |
| Dec 23, 3:24 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Bureau, Calhoun, Cass, Fulton and 26 more | 96 min |
| Dec 28, 5:26 AM CST | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 4 hr |
| Dec 28, 12:13 PM CST | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Jo Daviess and 8 more | 5 hr |
| Dec 28, 6:00 PM CST | Mesoscale Discussion | SPC | Boone, McHenry, Stephenson, Winnebago | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Gallatin County4
- Hamilton County4
- Hardin County4
- Saline County4
- Alexander County3
- Franklin County3
- Jackson County3
- Jefferson County3
- Johnson County3
- Madison County3
- Massac County3
- Monroe County3
- Perry County3
- Pope County3
- Pulaski County3
- Randolph County3
- Union County3
- Washington County3
- Williamson County3
- Edwards County3
- Wabash County3
- Wayne County3
- White County3
- Cook County3
- DuPage County3
- Kane County3
- Lake County3
- Bureau County3
- Henry County3
- Mercer County3
- Rock Island County3
- Stark County3
- Whiteside County3
- Boone County3
- McHenry County3
- Stephenson County3
- Winnebago County3
- Marion County2
- Saint Clair County2
- Clay County2
44 more counties
- Jasper County2
- Lawrence County2
- Richland County2
- Grundy County2
- Kendall County2
- Will County2
- Adams County2
- Brown County2
- Calhoun County2
- Cass County2
- Fulton County2
- Greene County2
- Hancock County2
- Henderson County2
- Jersey County2
- Knox County2
- McDonough County2
- Macoupin County2
- Marshall County2
- Mason County2
- Menard County2
- Morgan County2
- Peoria County2
- Pike County2
- Sangamon County2
- Schuyler County2
- Scott County2
- Tazewell County2
- Warren County2
- Carroll County2
- DeKalb County2
- Lee County2
- Ogle County2
- Bond County1
- Clinton County1
- Ford County1
- Iroquois County1
- Kankakee County1
- Livingston County1
- Crawford County1
- Logan County1
- LaSalle County1
- Putnam County1
- Jo Daviess County1
Nearby
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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.