Alert archive / Illinois / Mesoscale Discussions / 2025
Mesoscale Discussions in Illinois, September 2025
2 mesoscale discussions in September 2025. 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 2025. Tap one for its archive.
- Mesoscale Discussions
- 2
- Busiest day
- September 14, 20251 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 14, 3:12 PM CDT | Mesoscale Discussion | SPC | Alexander, Bond, Calhoun, Clay, Clinton, Edwards and 32 more | 2 hr |
| Sep 21, 4:43 PM CDT | Mesoscale Discussion | SPC | Adams, Brown, Calhoun, Cass, Christian, Greene and 10 more | 92 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Calhoun County2
- Greene County2
- Jersey County2
- Macoupin County2
- Madison County2
- Montgomery County2
- Alexander County1
- Bond County1
- Clay County1
- Clinton County1
- Edwards County1
- Effingham County1
- Fayette County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jackson County1
- Jasper County1
- Jefferson County1
- Johnson County1
- Lawrence County1
- Marion County1
- Massac County1
- Monroe County1
- Perry County1
- Pope County1
- Pulaski County1
- Randolph County1
- Richland County1
- Saint Clair County1
- Saline County1
- Union County1
- Wabash County1
- Washington County1
- Wayne County1
- White County1
- Williamson County1
- Adams County1
- Brown County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.