Alert archive / Illinois / Mesoscale Discussions / 2020
Mesoscale Discussions in Illinois, April 2020
16 mesoscale discussions in April 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 April 2020. Tap one for its archive.
- Mesoscale Discussions
- 16
- Busiest day
- April 7, 20204 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 |
|---|---|---|---|---|
| Apr 6, 11:03 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 8 more | 2 hr |
| Apr 7, 3:06 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 2 more | 114 min |
| Apr 7, 5:07 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Grundy and 20 more | 83 min |
| Apr 7, 5:59 PM CDT | Mesoscale Discussion | SPC | Cook | 91 min |
| Apr 7, 7:22 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 18 more | 83 min |
| Apr 7, 11:20 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, Coles, Douglas, Edgar, Macon and 3 more | 85 min |
| Apr 8, 1:46 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Calhoun, Cass, Champaign and 43 more | 119 min |
| Apr 8, 3:45 PM CDT | Mesoscale Discussion | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Hardin and 14 more | 2 hr |
| Apr 8, 7:46 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Clinton, Crawford, Edwards, Franklin and 22 more | 119 min |
| Apr 16, 5:43 PM CDT | Mesoscale Discussion | SPC | Hancock, Henderson, McDonough, Warren | 4 hr |
| Apr 28, 3:33 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 41 more | 87 min |
| Apr 28, 4:51 PM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Grundy, Kane, Kankakee and 4 more | 114 min |
| Apr 28, 6:32 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Cass, Champaign, Christian, Clinton and 29 more | 118 min |
| Apr 28, 6:41 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Edwards, Franklin, Hamilton, Jackson and 12 more | 64 min |
| Apr 28, 9:06 PM CDT | Mesoscale Discussion | SPC | Bond, Christian, Clinton, Coles, Cumberland, Douglas and 15 more | 84 min |
| Apr 28, 11:12 PM CDT | Mesoscale Discussion | SPC | Hardin, Johnson, Massac, Pope, Pulaski | 63 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County5
- DeKalb County5
- DuPage County5
- Kane County5
- LaSalle County5
- Christian County5
- Macon County5
- Moultrie County5
- Piatt County5
- Clinton County5
- Marion County5
- Randolph County5
- Washington County5
- Boone County4
- Grundy County4
- Kendall County4
- Lake County4
- McHenry County4
- Will County4
- Mercer County4
- Warren County4
- Douglas County4
- Bond County4
- Fayette County4
- Jersey County4
- Macoupin County4
- Madison County4
- Monroe County4
- Montgomery County4
- Saint Clair County4
- Shelby County4
- Jackson County4
- Johnson County4
- Perry County4
- Pulaski County4
- Lee County3
- Ogle County3
- Winnebago County3
- Bureau County3
- Henry County3
60 more counties
- Knox County3
- Marshall County3
- Putnam County3
- Rock Island County3
- Stark County3
- Champaign County3
- Coles County3
- Calhoun County3
- Cass County3
- Clay County3
- DeWitt County3
- Effingham County3
- Greene County3
- Hancock County3
- Henderson County3
- Logan County3
- McDonough County3
- McLean County3
- Mason County3
- Menard County3
- Morgan County3
- Pike County3
- Sangamon County3
- Scott County3
- Tazewell County3
- Alexander County3
- Edwards County3
- Franklin County3
- Hamilton County3
- Hardin County3
- Jefferson County3
- Massac County3
- Pope County3
- Saline County3
- Union County3
- Wayne County3
- Williamson County3
- Kankakee County2
- Carroll County2
- Stephenson County2
- Whiteside County2
- Edgar County2
- Adams County2
- Brown County2
- Cumberland County2
- Fulton County2
- Jasper County2
- Peoria County2
- Schuyler County2
- Woodford County2
- Gallatin County2
- White County2
- Richland County2
- Livingston County2
- Jo Daviess County1
- Vermilion County1
- Clark County1
- Crawford County1
- Lawrence County1
- Wabash 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.