Alert archive / Illinois / Severe Thunderstorm Warnings / 2018
Severe Thunderstorm Warnings in Illinois, September 2018
16 severe thunderstorm warnings 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 severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in September 2018. Tap one for its archive.
- Severe Thunderstorm Warnings
- 16
- Busiest day
- September 25, 20189 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 |
|---|---|---|---|---|
| Aug 31, 7:40 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 20 min |
| Sep 1, 10:53 PM CDT | Severe Thunderstorm Warning | LOT | Ogle, Winnebago | 38 min |
| Sep 3, 1:39 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 36 min |
| Sep 3, 2:26 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 19 min |
| Sep 18, 11:47 AM CDT | Severe Thunderstorm Warning | DVN | Mercer, Rock Island | 58 min |
| Sep 18, 12:32 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Mercer, Warren | 58 min |
| Sep 18, 1:23 PM CDT | Severe Thunderstorm Warning | DVN | Henderson | 39 min |
| Sep 25, 2:27 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island, Whiteside | 63 min |
| Sep 25, 3:14 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Carroll, Henry, Rock Island, Whiteside | 61 min |
| Sep 25, 3:27 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 48 min |
| Sep 25, 4:01 PM CDT | Severe Thunderstorm Warning | DVN | Bureau | 29 min |
| Sep 25, 4:01 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, Kane, Kendall, LaSalle, Lee and 2 more | 59 min |
| Sep 25, 4:03 PM CDT | Severe Thunderstorm Warning | ILX | Knox, Stark | 27 min |
| Sep 25, 4:13 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 47 min |
| Sep 25, 4:52 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Lake, McHenry and 1 more | 68 min |
| Sep 25, 6:29 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 31 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County5
- Ogle County3
- Rock Island County3
- Bureau County3
- Winnebago County2
- DuPage County2
- Will County2
- Mercer County2
- Henderson County2
- Whiteside County2
- Lee County2
- Kane County2
- Kendall County2
- McHenry County2
- Warren County1
- Carroll County1
- Henry County1
- Boone County1
- DeKalb County1
- LaSalle County1
- Knox County1
- Stark County1
- Putnam County1
- Lake 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. Rebuilt daily.