Alert archive / Illinois / Mesoscale Discussions / 2018
Mesoscale Discussions in Illinois, August 2018
17 mesoscale discussions in August 2018. 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 2018. Tap one for its archive.
- Mesoscale Discussions
- 17
- Busiest day
- August 20, 20183 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 5, 5:44 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Ogle, Rock Island, Stephenson, Whiteside | 2 hr |
| Aug 6, 3:16 PM CDT | Mesoscale Discussion | SPC | Alexander, Clay, Edwards, Franklin, Gallatin, Hamilton and 19 more | 2 hr |
| Aug 6, 5:21 PM CDT | Mesoscale Discussion | SPC | Champaign, DeWitt, Ford, Iroquois, Kankakee, Livingston and 5 more | 114 min |
| Aug 7, 1:04 AM CDT | Mesoscale Discussion | SPC | Bond, Brown, Calhoun, Cass, Champaign, Christian and 24 more | 56 min |
| Aug 7, 12:22 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Jackson, Johnson, Massac and 5 more | 113 min |
| Aug 9, 2:55 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 4 more | 65 min |
| Aug 10, 4:48 PM CDT | Mesoscale Discussion | SPC | Clark, Coles, Crawford, Cumberland, Douglas, Edgar and 5 more | 117 min |
| Aug 15, 2:50 PM CDT | Mesoscale Discussion | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 115 min |
| Aug 16, 10:40 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Clay, Clinton, Coles and 22 more | 2 hr |
| Aug 20, 11:46 AM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Clay, Clinton, Franklin, Hamilton and 17 more | 119 min |
| Aug 20, 4:00 PM CDT | Mesoscale Discussion | SPC | Alexander, Clinton, Edwards, Franklin, Gallatin, Hamilton and 14 more | 2 hr |
| Aug 20, 4:46 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Grundy and 11 more | 119 min |
| Aug 25, 5:15 PM CDT | Mesoscale Discussion | SPC | Bureau, Fulton, Grundy, Iroquois, Kankakee, Kendall and 11 more | 2 hr |
| Aug 28, 12:14 PM CDT | Mesoscale Discussion | SPC | Jo Daviess | 2 hr |
| Aug 28, 3:42 PM CDT | Mesoscale Discussion | SPC | Bureau, Cook, DeKalb, DuPage, Grundy, Kane and 11 more | 93 min |
| Aug 28, 7:05 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more | 55 min |
| Aug 28, 9:54 PM CDT | Mesoscale Discussion | SPC | Brown, Cass, Cook, DeWitt, DuPage, Ford and 24 more | 66 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kankakee County6
- Alexander County5
- Jackson County5
- Johnson County5
- Pulaski County5
- Saline County5
- Union County5
- Williamson County5
- Livingston County5
- Peoria County5
- Woodford County5
- Cook County5
- DuPage County5
- Kane County5
- Grundy County5
- Kendall County5
- Will County5
- Ogle County4
- Stephenson County4
- Franklin County4
- Gallatin County4
- Jefferson County4
- Marion County4
- Massac County4
- Perry County4
- Pope County4
- Randolph County4
- Washington County4
- DeWitt County4
- Ford County4
- Iroquois County4
- Tazewell County4
- DeKalb County4
- Lake County4
- LaSalle County4
- Marshall County4
- Putnam County4
- Stark County4
- Carroll County3
- Jo Daviess County3
58 more counties
- Clay County3
- Hamilton County3
- Hardin County3
- Wayne County3
- Champaign County3
- Logan County3
- McLean County3
- Piatt County3
- Bond County3
- Fayette County3
- Fulton County3
- Madison County3
- Shelby County3
- Boone County3
- McHenry County3
- Winnebago County3
- Clinton County3
- Lee County3
- Bureau County3
- Knox County3
- Whiteside County2
- Edwards County2
- Lawrence County2
- Wabash County2
- White County2
- Brown County2
- Cass County2
- Christian County2
- Macon County2
- Macoupin County2
- Mason County2
- Menard County2
- Montgomery County2
- Moultrie County2
- Schuyler County2
- Coles County2
- Cumberland County2
- Douglas County2
- Effingham County2
- Monroe County2
- Saint Clair County2
- Warren County2
- Rock Island County1
- Richland County1
- Vermilion County1
- Calhoun County1
- Greene County1
- Jersey County1
- Morgan County1
- Pike County1
- Sangamon County1
- Scott County1
- Clark County1
- Crawford County1
- Edgar County1
- Jasper County1
- Henry County1
- McDonough County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20172019
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.