Alert archive / Illinois / Mesoscale Discussions / 2017
Mesoscale Discussions in Illinois, August 2017
8 mesoscale discussions in August 2017. 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 2017. Tap one for its archive.
- Mesoscale Discussions
- 8
- Busiest day
- August 3, 20172 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 3, 12:13 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 4 more | 2 hr |
| Aug 3, 5:18 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, DuPage, Fulton and 27 more | 2 hr |
| Aug 10, 2:07 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, DeKalb, Henderson, Henry and 11 more | 113 min |
| Aug 10, 5:31 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 23 more | 89 min |
| Aug 16, 2:35 PM CDT | Mesoscale Discussion | SPC | Adams, Bond, Brown, Bureau, Calhoun, Cass and 31 more | 2 hr |
| Aug 20, 1:06 PM CDT | Mesoscale Discussion | SPC | Alexander, Jackson, Johnson, Pulaski, Randolph, Union | 84 min |
| Aug 21, 12:41 PM CDT | Mesoscale Discussion | SPC | Clark, Coles, Crawford, Cumberland, Edgar, Effingham and 3 more | 94 min |
| Aug 21, 3:29 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Clark, Clay, Clinton, Crawford and 22 more | 91 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County4
- DeKalb County4
- Ogle County4
- Winnebago County4
- Bureau County4
- Henderson County4
- Henry County4
- Knox County4
- Mercer County4
- Rock Island County4
- Stark County4
- Warren County4
- Whiteside County4
- DuPage County3
- Kane County3
- McHenry County3
- Stephenson County3
- Carroll County3
- Lee County3
- Peoria County3
- Cook County2
- Lake County2
- Fulton County2
- Grundy County2
- Jo Daviess County2
- Kendall County2
- LaSalle County2
- Logan County2
- Marshall County2
- Mason County2
- Putnam County2
- Tazewell County2
- Woodford County2
- Bond County2
- Calhoun County2
- Clinton County2
- Greene County2
- Jersey County2
- Macoupin County2
- Madison County2
45 more counties
- Monroe County2
- Montgomery County2
- Saint Clair County2
- Washington County2
- Clark County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Jasper County2
- Lawrence County2
- Richland County2
- Livingston County1
- McLean County1
- Kankakee County1
- Will County1
- Adams County1
- Brown County1
- Cass County1
- Christian County1
- Hancock County1
- McDonough County1
- Menard County1
- Morgan County1
- Pike County1
- Sangamon County1
- Schuyler County1
- Scott County1
- Alexander County1
- Jackson County1
- Johnson County1
- Pulaski County1
- Randolph County1
- Union County1
- Coles County1
- Edgar County1
- Clay County1
- Edwards County1
- Fayette County1
- Hamilton County1
- Jefferson County1
- Marion County1
- Shelby County1
- Wabash County1
- Wayne County1
- White County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.