Alert archive / Illinois / Mesoscale Discussions / 2021
Mesoscale Discussions in Illinois, December 2021
15 mesoscale discussions in December 2021. 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 2021. Tap one for its archive.
- Mesoscale Discussions
- 15
- Busiest day
- December 11, 20216 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 5, 8:06 PM CST | Mesoscale Discussion | SPC | Alexander, Hardin, Jackson, Johnson, Massac, Pope and 4 more | 114 min |
| Dec 5, 11:28 PM CST | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more | 2 hr |
| Dec 10, 1:35 PM CST | Mesoscale Discussion | SPC | Alexander, Pulaski, Union | 2 hr |
| Dec 10, 4:45 PM CST | Mesoscale Discussion | SPC | Alexander, Hardin, Jackson, Johnson, Massac, Pope and 3 more | 90 min |
| Dec 10, 5:27 PM CST | Mesoscale Discussion | SPC | Calhoun, Jersey | 3 hr |
| Dec 10, 7:02 PM CST | Mesoscale Discussion | SPC | Calhoun, Greene, Jersey, Macoupin, Madison, Monroe and 4 more | 58 min |
| Dec 10, 7:18 PM CST | Mesoscale Discussion | SPC | Champaign, Christian, Clark, Clay, Coles, Crawford and 18 more | 87 min |
| Dec 10, 8:53 PM CST | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clark, Clay, Coles and 21 more | 97 min |
| Dec 10, 9:36 PM CST | Mesoscale Discussion | SPC | Clark, Coles, Cumberland, Edgar, Effingham, Shelby | 54 min |
| Dec 10, 10:09 PM CST | Mesoscale Discussion | SPC | Massac | 96 min |
| Dec 10, 11:28 PM CST | Mesoscale Discussion | SPC | Alexander, Clark, Clay, Coles, Crawford, Cumberland and 24 more | 92 min |
| Dec 15, 4:51 PM CST | Mesoscale Discussion | SPC | Henderson, Jo Daviess, Mercer, Rock Island | 114 min |
| Dec 15, 5:30 PM CST | Mesoscale Discussion | SPC | Adams | 90 min |
| Dec 15, 9:48 PM CST | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 16 more | 87 min |
| Dec 28, 8:59 AM CST | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 26 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Alexander County5
- Massac County5
- Pulaski County5
- Union County5
- Hardin County4
- Jackson County4
- Johnson County4
- Pope County4
- Williamson County4
- Clark County4
- Coles County4
- Cumberland County4
- Edgar County4
- Effingham County4
- Saline County3
- Calhoun County3
- Jersey County3
- Clay County3
- Crawford County3
- Jasper County3
- Logan County3
- Richland County3
- Shelby County3
- Henderson County3
- Edwards County2
- Franklin County2
- Gallatin County2
- Hamilton County2
- Jefferson County2
- Perry County2
- Wabash County2
- Wayne County2
- White County2
- Greene County2
- Madison County2
- Pike County2
- Scott County2
- Champaign County2
- Christian County2
- DeWitt County2
61 more counties
- Douglas County2
- Ford County2
- Lawrence County2
- McLean County2
- Macon County2
- Moultrie County2
- Piatt County2
- Tazewell County2
- Vermilion County2
- Marion County2
- Sangamon County2
- Jo Daviess County2
- Mercer County2
- Rock Island County2
- Adams County2
- Knox County2
- Peoria County2
- Warren County2
- Washington County1
- Macoupin County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Iroquois County1
- Bond County1
- Fayette County1
- Montgomery County1
- Brown County1
- Cass County1
- Fulton County1
- Hancock County1
- McDonough County1
- Mason County1
- Menard County1
- Morgan County1
- Schuyler County1
- Boone County1
- Bureau County1
- Carroll County1
- Cook County1
- DeKalb County1
- DuPage County1
- Grundy County1
- Henry County1
- Kane County1
- Kankakee County1
- Kendall County1
- Lake County1
- LaSalle County1
- Lee County1
- Livingston County1
- McHenry County1
- Marshall County1
- Ogle County1
- Putnam County1
- Stark County1
- Stephenson County1
- Whiteside County1
- Will County1
- Winnebago County1
- Woodford County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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. Rebuilt daily.