Alert archive / Illinois / Severe Thunderstorm Warnings / 2025
Severe Thunderstorm Warnings in Illinois, August 2025
55 severe thunderstorm warnings in August 2025. 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 2025. Tap one for its archive.
- Severe Thunderstorm Warnings
- 55
- Busiest day
- August 16, 202514 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 7, 5:37 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Shelby | 23 min |
| Aug 9, 7:26 PM CDT | Severe Thunderstorm Warning | LSX | Adams | 35 min |
| Aug 12, 3:36 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 24 min |
| Aug 12, 3:45 PM CDT | Severe Thunderstorm Warning | ILX | Macon | 30 min |
| Aug 12, 4:12 PM CDT | Severe Thunderstorm Warning | ILX | Macon, Piatt | 33 min |
| Aug 15, 6:13 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 62 min |
| Aug 16, 2:43 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 47 min |
| Aug 16, 3:04 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 40 min |
| Aug 16, 3:21 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 54 min |
| Aug 16, 3:36 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 39 min |
| Aug 16, 3:48 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DeKalb, Kane, Lake, McHenry, Ogle | 57 min |
| Aug 16, 3:48 PM CDT | Severe Thunderstorm Warning | LSX | Madison | 42 min |
| Aug 16, 4:10 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 50 min |
| Aug 16, 4:21 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane | 54 min |
| Aug 16, 5:00 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 45 min |
| Aug 16, 5:13 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 32 min |
| Aug 16, 5:38 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kankakee, Will | 52 min |
| Aug 16, 6:20 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 25 min |
| Aug 16, 6:43 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 32 min |
| Aug 16, 6:45 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee | 45 min |
| Aug 16, 7:03 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 45 min |
| Aug 16, 7:09 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle | 35 min |
| Aug 16, 7:13 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 32 min |
| Aug 16, 7:43 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee | 16 min |
| Aug 16, 7:56 PM CDT | Severe Thunderstorm Warning | DVN | Jo Daviess | 49 min |
| Aug 16, 8:40 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 35 min |
| Aug 16, 8:53 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson | 38 min |
| Aug 17, 2:27 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 48 min |
| Aug 17, 2:48 AM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Will | 27 min |
| Aug 17, 2:59 AM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 46 min |
| Aug 17, 3:28 AM CDT | Severe Thunderstorm Warning | LOT | Kankakee, Will | 47 min |
| Aug 18, 3:17 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb | 43 min |
| Aug 18, 3:39 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Lee, Ogle | 51 min |
| Aug 18, 4:09 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DeKalb, DuPage, Kane | 81 min |
| Aug 18, 4:28 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Kane, Kendall | 47 min |
| Aug 18, 5:25 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island, Whiteside | 65 min |
| Aug 18, 5:50 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Warren | 70 min |
| Aug 18, 5:53 PM CDT | Severe Thunderstorm Warning | DVN | Carroll, Jo Daviess, Stephenson, Whiteside | 52 min |
| Aug 18, 5:56 PM CDT | Severe Thunderstorm Warning | ILX | Knox | 49 min |
| Aug 18, 6:00 PM CDT | Severe Thunderstorm Warning | LOT | Ogle | 30 min |
| Aug 18, 6:11 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 79 min |
| Aug 18, 6:20 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 55 min |
| Aug 18, 7:12 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, LaSalle, Lee | 33 min |
| Aug 18, 7:16 PM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Warren | 44 min |
| Aug 18, 7:40 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 35 min |
| Aug 18, 8:11 PM CDT | Severe Thunderstorm Warning | LOT | Will | 19 min |
| Aug 18, 8:14 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox, Peoria | 31 min |
| Aug 18, 8:38 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria, Tazewell | 52 min |
| Aug 18, 9:11 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Logan, McLean, Mason, Peoria, Tazewell and 1 more | 34 min |
| Aug 19, 2:39 AM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Logan, Macon | 36 min |
| Aug 19, 3:14 AM CDT | Severe Thunderstorm Warning | ILX | Macon, Piatt | 31 min |
| Aug 19, 1:55 PM CDT | Severe Thunderstorm Warning | PAH | Alexander, Union | 50 min |
| Aug 19, 2:59 PM CDT | Severe Thunderstorm Warning | PAH | Hardin | 46 min |
| Aug 19, 3:14 PM CDT | Severe Thunderstorm Warning | PAH | Johnson, Massac, Pulaski, Union | 46 min |
| Aug 19, 3:53 PM CDT | Severe Thunderstorm Warning | PAH | Massac, Pope | 52 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County9
- DeKalb County9
- Kane County6
- Will County6
- DuPage County5
- Macon County4
- McHenry County4
- Ogle County4
- Vermilion County4
- Lee County4
- Fulton County4
- Boone County3
- Winnebago County3
- Kankakee County3
- Champaign County3
- Stephenson County3
- Jo Daviess County3
- Henry County3
- Whiteside County3
- Warren County3
- Knox County3
- Peoria County3
- Piatt County2
- Rock Island County2
- Lake County2
- Kendall County2
- Iroquois County2
- Carroll County2
- Hancock County2
- Henderson County2
- McDonough County2
- Tazewell County2
- Logan County2
- Union County2
- Massac County2
- Christian County1
- Shelby County1
- Adams County1
- Madison County1
- Ford County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20242026
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.