Alert archive / Illinois / Mesoscale Discussions / 2025
Mesoscale Discussions in Illinois, August 2025
13 mesoscale discussions in August 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 August 2025. Tap one for its archive.
- Mesoscale Discussions
- 13
- Busiest day
- August 18, 20254 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 9, 2:54 PM CDT | Mesoscale Discussion | SPC | Adams, Boone, Brown, Bureau, Carroll, Cook and 32 more | 96 min |
| Aug 12, 2:44 PM CDT | Mesoscale Discussion | SPC | Bond, Champaign, Christian, Coles, Cumberland, Douglas and 11 more | 2 hr |
| Aug 15, 3:32 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Whiteside | 88 min |
| Aug 15, 5:52 PM CDT | Mesoscale Discussion | SPC | Bureau, Carroll, Henderson, Henry, Jo Daviess, Knox and 12 more | 83 min |
| Aug 16, 11:56 AM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Lake and 2 more | 2 hr |
| Aug 16, 2:34 PM CDT | Mesoscale Discussion | SPC | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 5 more | 86 min |
| Aug 16, 4:44 PM CDT | Mesoscale Discussion | SPC | Cook, DeKalb, DuPage, Grundy, Kane, Kankakee and 3 more | 61 min |
| Aug 16, 8:06 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, DeKalb, DuPage, Grundy, Jo Daviess and 8 more | 84 min |
| Aug 17, 3:51 PM CDT | Mesoscale Discussion | SPC | Carroll, Lee, Whiteside | 84 min |
| Aug 18, 11:10 AM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 18 more | 95 min |
| Aug 18, 3:38 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Cook, DeKalb, DuPage, Grundy and 8 more | 97 min |
| Aug 18, 3:51 PM CDT | Mesoscale Discussion | SPC | Bureau, Hancock, Henderson, Henry, Knox, Lee and 6 more | 84 min |
| Aug 18, 5:34 PM CDT | Mesoscale Discussion | SPC | Bureau, DuPage, Grundy, Henry, Iroquois, Kankakee and 12 more | 86 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- DuPage County8
- Lee County8
- DeKalb County7
- Kane County7
- Kendall County7
- Boone County6
- Bureau County6
- Carroll County6
- Cook County6
- Grundy County6
- Lake County6
- McHenry County6
- Whiteside County6
- Will County6
- Henry County5
- LaSalle County5
- Ogle County5
- Putnam County5
- Stark County5
- Winnebago County5
- Knox County4
- Marshall County4
- Stephenson County4
- Warren County4
- Kankakee County4
- Henderson County3
- Livingston County3
- McDonough County3
- Mercer County3
- Peoria County3
- Rock Island County3
- Jo Daviess County3
- Hancock County2
- Woodford County2
- Iroquois County2
- Adams County1
- Brown County1
- Fulton County1
- Mason County1
- Schuyler 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.