Alert archive / Illinois / Mesoscale Discussions / 2021
Mesoscale Discussions in Illinois, October 2021
12 mesoscale discussions in October 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 October 2021. Tap one for its archive.
- Mesoscale Discussions
- 12
- Busiest day
- October 11, 20214 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 |
|---|---|---|---|---|
| Oct 11, 9:06 AM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 30 more | 2 hr |
| Oct 11, 12:37 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Cook, DeKalb, DuPage, Grundy and 18 more | 113 min |
| Oct 11, 3:37 PM CDT | Mesoscale Discussion | SPC | LaSalle, Marshall, Mason, Menard, Peoria, Putnam and 3 more | 83 min |
| Oct 11, 6:09 PM CDT | Mesoscale Discussion | SPC | Boone, Champaign, Coles, Cook, DeKalb, Douglas and 13 more | 96 min |
| Oct 14, 3:46 PM CDT | Mesoscale Discussion | SPC | Alexander, Pulaski | 119 min |
| Oct 15, 11:14 AM CDT | Mesoscale Discussion | SPC | Alexander, Massac, Pulaski | 3 hr |
| Oct 23, 9:14 PM CDT | Mesoscale Discussion | SPC | Adams, Hancock | 3 hr |
| Oct 24, 2:13 AM CDT | Mesoscale Discussion | SPC | Calhoun, Greene | 2 hr |
| Oct 24, 12:40 PM CDT | Mesoscale Discussion | SPC | Calhoun, Jersey | 3 hr |
| Oct 24, 5:11 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Cass, Champaign, Christian, Clark and 39 more | 3 hr |
| Oct 24, 8:17 PM CDT | Mesoscale Discussion | SPC | Clinton, Franklin, Jackson, Jefferson, Marion, Monroe and 5 more | 118 min |
| Oct 24, 10:33 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Champaign, Christian, Clay, Clinton and 31 more | 2 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calhoun County4
- Clinton County4
- Mason County4
- Menard County4
- Randolph County4
- Saint Clair County4
- Washington County4
- Bond County3
- Christian County3
- DeWitt County3
- Greene County3
- Jersey County3
- Logan County3
- Macon County3
- Monroe County3
- Montgomery County3
- Sangamon County3
- Tazewell County3
- Woodford County3
- LaSalle County3
- Champaign County3
- Coles County3
- Douglas County3
- Alexander County3
- Pulaski County3
- Jefferson County3
- Marion County3
- Perry County3
- Adams County2
- Cass County2
- Hancock County2
- McLean County2
- Macoupin County2
- Madison County2
- Morgan County2
- Peoria County2
- Pike County2
- Scott County2
- Boone County2
- Cook County2
49 more counties
- DeKalb County2
- DuPage County2
- Grundy County2
- Kane County2
- Kankakee County2
- Kendall County2
- Lake County2
- Lee County2
- Livingston County2
- Marshall County2
- Putnam County2
- Stark County2
- Will County2
- Edgar County2
- Ford County2
- Iroquois County2
- Vermilion County2
- Clay County2
- Cumberland County2
- Effingham County2
- Fayette County2
- Jasper County2
- Moultrie County2
- Piatt County2
- Shelby County2
- Franklin County2
- Jackson County2
- Union County2
- Brown County1
- Fulton County1
- Henderson County1
- Knox County1
- McDonough County1
- Schuyler County1
- Warren County1
- Bureau County1
- Henry County1
- McHenry County1
- Ogle County1
- Stephenson County1
- Whiteside County1
- Winnebago County1
- Massac County1
- Clark County1
- Hamilton County1
- Johnson County1
- Saline County1
- Wayne County1
- Williamson 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. Warning verification from the Mesonet's Cow. Rebuilt daily.