Alert archive / Illinois / Mesoscale Discussions / 2018
Mesoscale Discussions in Illinois, September 2018
8 mesoscale discussions in September 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 September 2018. Tap one for its archive.
- Mesoscale Discussions
- 8
- Busiest day
- September 25, 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 |
|---|---|---|---|---|
| Sep 1, 6:34 PM CDT | Mesoscale Discussion | SPC | Carroll, Henderson, Henry, Jo Daviess, Mercer, Rock Island and 2 more | 56 min |
| Sep 1, 10:27 PM CDT | Mesoscale Discussion | SPC | Carroll, Henry, Mercer, Rock Island, Whiteside | 63 min |
| Sep 2, 3:47 PM CDT | Mesoscale Discussion | SPC | Boone, Jo Daviess, McHenry, Stephenson, Winnebago | 118 min |
| Sep 3, 1:20 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 22 more | 2 hr |
| Sep 20, 3:16 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Cook, DeKalb, DuPage, Kane and 8 more | 89 min |
| Sep 25, 1:07 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Hancock, Henderson, Henry and 12 more | 113 min |
| Sep 25, 3:39 PM CDT | Mesoscale Discussion | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more | 96 min |
| Sep 25, 5:21 PM CDT | Mesoscale Discussion | SPC | Champaign, Clark, Clay, Coles, Crawford, Cumberland and 11 more | 114 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County6
- Whiteside County6
- Henry County5
- Jo Daviess County5
- Mercer County5
- Rock Island County5
- Boone County5
- Winnebago County5
- Henderson County4
- Warren County4
- McHenry County4
- Stephenson County4
- Lee County4
- Ogle County4
- Bureau County3
- Cook County3
- DeKalb County3
- DuPage County3
- Kane County3
- Kendall County3
- Knox County3
- Lake County3
- Stark County3
- Will County3
- Grundy County2
- LaSalle County2
- Marshall County2
- Putnam County2
- Hancock County2
- McDonough County2
- Fulton County1
- Livingston County1
- Peoria County1
- Woodford County1
- Champaign County1
- Clark County1
- Clay County1
- Coles County1
- Crawford County1
- Cumberland 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.