Alert archive / Illinois / Severe Thunderstorm Warnings / 2017
Severe Thunderstorm Warnings in Illinois, August 2017
27 severe thunderstorm warnings in August 2017. 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 August 2017. Tap one for its archive.
- Severe Thunderstorm Warnings
- 27
- Busiest day
- August 10, 20179 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 3, 5:08 PM CDT | Severe Thunderstorm Warning | DVN | Mercer, Warren | 21 min |
| Aug 3, 5:10 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 50 min |
| Aug 3, 5:49 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Clinton, Madison | 20 min |
| Aug 3, 6:06 PM CDT | Severe Thunderstorm Warning | DVN | McDonough | 39 min |
| Aug 3, 6:45 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Fayette, Montgomery | 17 min |
| Aug 3, 6:48 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell, Woodford | 57 min |
| Aug 3, 7:04 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Livingston | 41 min |
| Aug 3, 8:01 PM CDT | Severe Thunderstorm Warning | LOT | Kendall | 29 min |
| Aug 3, 9:13 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt | 32 min |
| Aug 3, 9:30 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Piatt | 20 min |
| Aug 10, 2:57 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess, Stephenson | 48 min |
| Aug 10, 4:06 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 24 min |
| Aug 10, 4:46 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island, Whiteside | 44 min |
| Aug 10, 5:14 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Mercer, Warren | 15 min |
| Aug 10, 5:30 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 45 min |
| Aug 10, 5:33 PM CDT | Severe Thunderstorm Warning | DVN | Henderson, Warren | 57 min |
| Aug 10, 6:04 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 56 min |
| Aug 10, 6:20 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 55 min |
| Aug 10, 6:25 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 27 min |
| Aug 10, 7:05 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Schuyler | 40 min |
| Aug 10, 7:32 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 15 min |
| Aug 10, 7:36 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 39 min |
| Aug 18, 6:33 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 42 min |
| Aug 19, 5:48 AM CDT | Severe Thunderstorm Warning | PAH | Hamilton, White | 42 min |
| Aug 21, 12:23 PM CDT | Severe Thunderstorm Warning | ILX | Coles, Cumberland | 52 min |
| Aug 21, 12:49 PM CDT | Severe Thunderstorm Warning | ILX | Clark, Coles, Cumberland, Edgar | 41 min |
| Aug 28, 2:23 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 37 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Warren County6
- Henderson County4
- McDonough County3
- Whiteside County3
- Bureau County3
- Mercer County2
- Bond County2
- Livingston County2
- Champaign County2
- Piatt County2
- Henry County2
- Hancock County2
- Coles County2
- Cumberland County2
- Lake County1
- Clinton County1
- Madison County1
- Fayette County1
- Montgomery County1
- McLean County1
- Tazewell County1
- Woodford County1
- Grundy County1
- Kendall County1
- Jo Daviess County1
- Stephenson County1
- Boone County1
- McHenry County1
- Rock Island County1
- Fulton County1
- Schuyler County1
- Putnam County1
- LaSalle County1
- Hamilton County1
- White County1
- Clark County1
- Edgar County1
- Cook County1
- Will County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.