Alert archive / Illinois / Mesoscale Discussions / 2011
Mesoscale Discussions in Illinois, September 2011
4 mesoscale discussions in September 2011. 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 2011. Tap one for its archive.
- Mesoscale Discussions
- 4
- Busiest day
- September 3, 20113 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 2, 2:41 PM CDT | Mesoscale Discussion | SPC | Boone, Carroll, Henry, Jo Daviess, Lee, Ogle and 4 more | 94 min |
| Sep 2, 11:56 PM CDT | Mesoscale Discussion | SPC | Carroll, Jo Daviess, Ogle, Stephenson, Whiteside, Winnebago | 94 min |
| Sep 3, 12:24 PM CDT | Mesoscale Discussion | SPC | Bureau, Cook, DeKalb, DuPage, Ford, Grundy and 13 more | 66 min |
| Sep 3, 5:02 PM CDT | Mesoscale Discussion | SPC | Bureau, Cook, DuPage, Ford, Fulton, Grundy and 23 more | 58 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Carroll County2
- Henry County2
- Jo Daviess County2
- Ogle County2
- Stephenson County2
- Whiteside County2
- Winnebago County2
- Bureau County2
- Cook County2
- DuPage County2
- Ford County2
- Grundy County2
- Iroquois County2
- Kane County2
- Kankakee County2
- Kendall County2
- LaSalle County2
- Livingston County2
- Marshall County2
- Putnam County2
- Stark County2
- Will County2
- Woodford County2
- Boone County1
- Lee County1
- Rock Island County1
- DeKalb County1
- Lake County1
- McHenry County1
- Fulton County1
- Hancock County1
- Henderson County1
- Knox County1
- McDonough County1
- McLean County1
- Mason County1
- Mercer County1
- Peoria County1
- Schuyler County1
- Tazewell County1
1 more counties
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.