Alert archive / Illinois / Mesoscale Discussions / 2017
Mesoscale Discussions in Illinois, September 2017
4 mesoscale discussions in September 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 September 2017. Tap one for its archive.
- Mesoscale Discussions
- 4
- Busiest day
- September 4, 20173 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 |
|---|---|---|---|---|
| Sep 4, 2:17 PM CDT | Mesoscale Discussion | SPC | Champaign, Douglas, Edgar, Ford, Iroquois, Vermilion | 118 min |
| Sep 4, 3:43 PM CDT | Mesoscale Discussion | SPC | Champaign, Christian, DeWitt, Douglas, Ford, Greene and 16 more | 2 hr |
| Sep 4, 6:05 PM CDT | Mesoscale Discussion | SPC | Bond, Calhoun, Champaign, Christian, Clark, Clay and 28 more | 115 min |
| Sep 4, 9:26 PM CDT | Mesoscale Discussion | SPC | Bond, Clark, Clay, Clinton, Coles, Crawford and 19 more | 64 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Champaign County3
- Douglas County3
- Edgar County3
- Vermilion County3
- Shelby County3
- Ford County2
- Iroquois County2
- Christian County2
- DeWitt County2
- Greene County2
- Jersey County2
- Macon County2
- Macoupin County2
- Montgomery County2
- Morgan County2
- Moultrie County2
- Piatt County2
- Pike County2
- Sangamon County2
- Scott County2
- Bond County2
- Clark County2
- Clay County2
- Clinton County2
- Coles County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Fayette County2
- Jasper County2
- Madison County2
- Marion County2
- Monroe County2
- Richland County2
- Saint Clair County2
- Logan County1
- McLean County1
- Menard County1
- Calhoun County1
- Edwards 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. Warning verification from the Mesonet's Cow. Rebuilt daily.