Alert archive / Illinois / Tornado Warnings / 2026
Tornado Warnings in Illinois, August 2026
28 tornado warnings in August 2026. 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in August 2026. Tap one for its archive.
- Tornado Warnings
- 28
- Busiest day
- August 10, 202616 tornado 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 9, 9:00 PM CDT | Tornado Warning | DVN | Bureau, Henry | 29 min |
| Aug 9, 9:24 PM CDT | Tornado Warning | DVN | Bureau, Putnam | 28 min |
| Aug 9, 9:33 PM CDT | Tornado Warning | DVN | Henry | 42 min |
| Aug 9, 9:49 PM CDT | Tornado Warning | LOT | Lee | 41 min |
| Aug 9, 9:57 PM CDT | Tornado Warning | ILX | Knox, Peoria | 48 min |
| Aug 9, 10:05 PM CDT | Tornado Warning | DVN | Bureau | 55 min |
| Aug 9, 10:22 PM CDT | Tornado Warning | ILX | Marshall, Peoria, Stark | 27 min |
| Aug 9, 10:23 PM CDT | Tornado Warning | LOT | Lee | 26 min |
| Aug 9, 10:46 PM CDT | Tornado Warning | ILX | Peoria | 24 min |
| Aug 9, 11:22 PM CDT | Tornado Warning | LOT | LaSalle | 23 min |
| Aug 9, 11:36 PM CDT | Tornado Warning | LOT | LaSalle | 24 min |
| Aug 9, 11:59 PM CDT | Tornado Warning | LOT | Grundy, LaSalle | 17 min |
| Aug 10, 12:39 AM CDT | Tornado Warning | LOT | Ford, Kankakee, Livingston | 36 min |
| Aug 10, 12:54 AM CDT | Tornado Warning | LOT | Livingston | 36 min |
| Aug 10, 1:28 AM CDT | Tornado Warning | LOT | Iroquois | 16 min |
| Aug 10, 1:31 AM CDT | Tornado Warning | LOT | Ford, Livingston | 29 min |
| Aug 11, 8:38 AM CDT | Tornado Warning | DVN | Rock Island, Whiteside | 23 min |
| Aug 11, 10:10 AM CDT | Tornado Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 50 min |
| Aug 11, 10:27 AM CDT | Tornado Warning | LOT | Grundy, Kankakee, Kendall, Will | 37 min |
| Aug 11, 10:29 AM CDT | Tornado Warning | LOT | Cook, DuPage | 46 min |
| Aug 11, 10:36 AM CDT | Tornado Warning | LOT | Cook, Will | 28 min |
| Aug 11, 3:25 PM CDT | Tornado Warning | ILX | Champaign, Douglas, Piatt | 50 min |
| Aug 12, 8:15 AM CDT | Tornado Warning | DVN | Bureau | 28 min |
| Aug 12, 8:37 AM CDT | Tornado Warning | LOT | LaSalle | 38 min |
| Aug 20, 12:31 AM CDT | Tornado Warning | PAH | Alexander | 13 min |
| Aug 21, 6:56 PM CDT | Tornado Warning | DVN | Bureau, Putnam | 49 min |
| Aug 21, 7:22 PM CDT | Tornado Warning | DVN | Putnam | 23 min |
| Aug 21, 8:09 PM CDT | Tornado Warning | DVN | Putnam | 21 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bureau County5
- Putnam County4
- LaSalle County4
- Peoria County3
- Livingston County3
- Cook County3
- Will County3
- Henry County2
- Lee County2
- Grundy County2
- Ford County2
- Kankakee County2
- DuPage County2
- Kendall County2
- Knox County1
- Marshall County1
- Stark County1
- Iroquois County1
- Rock Island County1
- Whiteside County1
- Kane County1
- Champaign County1
- Douglas County1
- Piatt County1
- Alexander County1
Nearby
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.