Alert archive / Illinois / Severe Thunderstorm Warnings / 2011
Severe Thunderstorm Warnings in Illinois, September 2011
15 severe thunderstorm warnings 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in September 2011. Tap one for its archive.
- Severe Thunderstorm Warnings
- 15
- Busiest day
- September 3, 201115 severe thunderstorm warnings
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 3, 2:04 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 56 min |
| Sep 3, 2:17 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 43 min |
| Sep 3, 2:47 PM CDT | Severe Thunderstorm Warning | LOT | Will | 37 min |
| Sep 3, 2:52 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Henry, Mercer, Warren | 53 min |
| Sep 3, 2:54 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 36 min |
| Sep 3, 3:22 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 53 min |
| Sep 3, 3:42 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 14 min |
| Sep 3, 3:44 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 61 min |
| Sep 3, 3:44 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 28 min |
| Sep 3, 3:55 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria, Tazewell, Woodford | 50 min |
| Sep 3, 4:35 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Peoria, Stark, Woodford | 40 min |
| Sep 3, 5:05 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Woodford | 25 min |
| Sep 3, 6:27 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Saint Clair | 33 min |
| Sep 3, 6:42 PM CDT | Severe Thunderstorm Warning | ILX | Christian | 21 min |
| Sep 3, 6:42 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 24 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County3
- Will County3
- Woodford County3
- LaSalle County2
- Warren County2
- Fulton County2
- Peoria County2
- DuPage County1
- Henderson County1
- Henry County1
- Mercer County1
- Knox County1
- Livingston County1
- Tazewell County1
- Marshall County1
- Stark County1
- McLean County1
- Monroe County1
- Saint Clair County1
- Christian County1
- Madison County1
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. Rebuilt daily.