Alert archive / Illinois / Mesoscale Discussions / 2020
Mesoscale Discussions in Illinois, August 2020
15 mesoscale discussions in August 2020. 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 August 2020. Tap one for its archive.
- Mesoscale Discussions
- 15
- Busiest day
- August 10, 20206 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 |
|---|---|---|---|---|
| Aug 9, 1:30 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Jo Daviess, Ogle, Stephenson, Winnebago | 2 hr |
| Aug 10, 10:42 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 36 more | 93 min |
| Aug 10, 12:14 PM CDT | Mesoscale Discussion | SPC | Rock Island | 91 min |
| Aug 10, 1:36 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 20 more | 114 min |
| Aug 10, 2:38 PM CDT | Mesoscale Discussion | SPC | Adams, Alexander, Bond, Brown, Calhoun, Cass and 42 more | 2 hr |
| Aug 10, 3:36 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 84 min |
| Aug 10, 5:17 PM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clark, Clay, Clinton, Coles and 29 more | 118 min |
| Aug 10, 7:29 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Crawford, Edwards, Effingham and 24 more | 91 min |
| Aug 15, 2:00 PM CDT | Mesoscale Discussion | SPC | Monroe, Randolph | 2 hr |
| Aug 15, 4:40 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Cass, Champaign, Christian, Coles and 37 more | 95 min |
| Aug 24, 10:55 PM CDT | Mesoscale Discussion | SPC | Boone, McHenry | 2 hr |
| Aug 28, 12:32 PM CDT | Mesoscale Discussion | SPC | Iroquois, Kankakee | 88 min |
| Aug 28, 2:56 PM CDT | Mesoscale Discussion | SPC | Carroll, Henderson, Jo Daviess, Mercer, Rock Island, Stephenson and 1 more | 64 min |
| Aug 28, 5:29 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Henderson, Henry and 12 more | 91 min |
| Aug 31, 12:43 PM CDT | Mesoscale Discussion | SPC | Alexander, Jackson, Johnson, Massac, Pope, Pulaski and 2 more | 92 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County6
- Carroll County5
- Stephenson County5
- DeKalb County5
- Kane County5
- Kankakee County5
- McHenry County5
- Rock Island County5
- Jo Daviess County4
- Ogle County4
- Winnebago County4
- Cook County4
- DuPage County4
- Grundy County4
- Iroquois County4
- Kendall County4
- Lake County4
- LaSalle County4
- Mercer County4
- Whiteside County4
- Will County4
- Effingham County4
- Fayette County4
- Randolph County4
- Bureau County3
- Ford County3
- Henderson County3
- Henry County3
- Lee County3
- Livingston County3
- McLean County3
- Marshall County3
- Putnam County3
- Stark County3
- Tazewell County3
- Woodford County3
- Alexander County3
- Bond County3
- Christian County3
- Clay County3
61 more counties
- Clinton County3
- Coles County3
- Douglas County3
- Franklin County3
- Hamilton County3
- Jackson County3
- Jasper County3
- Jefferson County3
- Jersey County3
- Johnson County3
- Macoupin County3
- Madison County3
- Marion County3
- Massac County3
- Monroe County3
- Montgomery County3
- Moultrie County3
- Perry County3
- Pope County3
- Pulaski County3
- Shelby County3
- Union County3
- Washington County3
- Wayne County3
- Williamson County3
- Champaign County2
- DeWitt County2
- Knox County2
- Mason County2
- Warren County2
- Calhoun County2
- Cass County2
- Cumberland County2
- Greene County2
- Logan County2
- Macon County2
- Menard County2
- Morgan County2
- Piatt County2
- Saint Clair County2
- Saline County2
- Sangamon County2
- Scott County2
- Crawford County2
- Edwards County2
- Lawrence County2
- Richland County2
- Wabash County2
- White County2
- Fulton County1
- Hancock County1
- McDonough County1
- Peoria County1
- Adams County1
- Brown County1
- Pike County1
- Clark County1
- Edgar County1
- Vermilion County1
- Gallatin County1
- Hardin County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.