Tornado Warnings in Illinois
4,620 tornado warnings since 1986. 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 since 1986. Tap one for its archive.
- Tornado Warnings
- 4,620
- Busiest year
- 2026333 tornado warnings
- Average year
- 113over 41 years on file
Over time
By year
Before October 2007 these were issued for whole counties, and a storm crossing three counties was often three warnings; since then one polygon follows the storm. The count changed with the practice, not only with the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- McLean County153
- Tazewell County149
- Macon County148
- Champaign County145
- Sangamon County141
- Christian County133
- Logan County125
- Saint Clair County125
- Piatt County119
- Madison County119
- Vermilion County117
- Shelby County116
- Pike County115
- Fulton County114
- Woodford County109
- Livingston County108
- Peoria County107
- Fayette County105
- Henry County103
- Will County103
- DeWitt County102
- Cook County101
- Montgomery County100
- Mason County99
- Randolph County98
- LaSalle County97
- Macoupin County96
- Iroquois County95
- Jackson County94
- Douglas County93
- Whiteside County90
- Bureau County90
- Pope County88
- Adams County87
- Coles County86
- Monroe County86
- Clinton County85
- Jasper County84
- Kankakee County83
- Bond County83
62 more counties
- Rock Island County81
- Massac County80
- Marion County80
- Alexander County79
- Calhoun County79
- Washington County79
- Knox County78
- Morgan County77
- Edgar County76
- Effingham County75
- Clay County72
- Marshall County70
- Greene County70
- Wayne County70
- Moultrie County69
- Cumberland County68
- Pulaski County67
- Union County66
- Clark County66
- McDonough County66
- Franklin County65
- Hancock County65
- Warren County65
- Williamson County65
- Mercer County64
- DeKalb County64
- Jefferson County64
- Johnson County63
- Perry County61
- Jersey County60
- Richland County60
- Kane County59
- Ford County59
- Crawford County58
- Carroll County57
- Wabash County57
- Menard County56
- Lee County55
- DuPage County55
- White County53
- Henderson County53
- Gallatin County53
- McHenry County52
- Stark County52
- Ogle County51
- Grundy County51
- Saline County51
- Schuyler County49
- Jo Daviess County49
- Lawrence County48
- Winnebago County47
- Cass County47
- Edwards County46
- Brown County46
- Boone County44
- Hardin County44
- Hamilton County43
- Scott County40
- Stephenson County37
- Kendall County35
- Putnam County35
- Lake County31
The latest tornado warnings
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:39 PM CDT | Tornado Warning | ILX | Clay, Richland | 34 min |
| Sep 20, 6:59 PM CDT | Tornado Warning | ILX | Clay, Effingham | 46 min |
| Aug 21, 8:09 PM CDT | Tornado Warning | DVN | Putnam | 21 min |
| Aug 21, 7:22 PM CDT | Tornado Warning | DVN | Putnam | 23 min |
| Aug 21, 6:56 PM CDT | Tornado Warning | DVN | Bureau, Putnam | 49 min |
| Aug 20, 12:31 AM CDT | Tornado Warning | PAH | Alexander | 13 min |
| Aug 12, 8:37 AM CDT | Tornado Warning | LOT | LaSalle | 38 min |
| Aug 12, 8:15 AM CDT | Tornado Warning | DVN | Bureau | 28 min |
| Aug 11, 3:25 PM CDT | Tornado Warning | ILX | Champaign, Douglas, Piatt | 50 min |
| Aug 11, 10:36 AM CDT | Tornado Warning | LOT | Cook, Will | 28 min |
| Aug 11, 10:29 AM CDT | Tornado Warning | LOT | Cook, DuPage | 46 min |
| Aug 11, 10:27 AM CDT | Tornado Warning | LOT | Grundy, Kankakee, Kendall, Will | 37 min |
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.