Severe Thunderstorm Watches in Illinois
1,388 severe thunderstorm watches 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 severe thunderstorm watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count since 1986. Tap one for its archive.
- Severe Thunderstorm Watches
- 1,388
- Busiest year
- 200378 severe thunderstorm watches
- Average year
- 46over 30 years on file
Over time
By year
Watches are counted from 1997, when the Storm Prediction Center archive begins.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Grundy County300
- LaSalle County297
- Kankakee County295
- Tazewell County295
- Will County294
- Monroe County293
- Saint Clair County292
- Calhoun County289
- Iroquois County289
- Madison County289
- Pike County289
- Ford County287
- McLean County287
- Putnam County287
- Shelby County286
- Logan County284
- Livingston County283
- Greene County282
- Kendall County282
- Macoupin County282
- Mason County282
- Moultrie County282
- Peoria County282
- Clinton County281
- Macon County281
- Christian County280
- Fayette County280
- Kane County280
- Lee County280
- Fulton County279
- Washington County279
- DeKalb County278
- Jersey County278
- Sangamon County278
- Ogle County277
- Woodford County277
- Montgomery County276
- Coles County275
- Mercer County275
- Piatt County275
62 more counties
- Rock Island County275
- Menard County273
- Bond County271
- Effingham County271
- Marshall County271
- Morgan County271
- Bureau County270
- Cass County270
- Cook County270
- Boone County269
- DuPage County269
- Randolph County269
- Champaign County268
- Douglas County268
- Henderson County268
- Henry County268
- Brown County266
- Jasper County266
- DeWitt County265
- Crawford County263
- Edgar County263
- Winnebago County263
- Clay County262
- Cumberland County261
- Richland County261
- Scott County261
- Adams County260
- Marion County260
- Vermilion County260
- Warren County260
- Knox County259
- Schuyler County259
- Stark County258
- McHenry County257
- Lawrence County255
- Whiteside County255
- McDonough County253
- Carroll County252
- Clark County252
- Stephenson County252
- Jo Daviess County248
- Lake County245
- Hancock County244
- White County242
- Edwards County241
- Gallatin County241
- Hamilton County240
- Saline County238
- Wayne County238
- Wabash County236
- Franklin County234
- Williamson County233
- Johnson County232
- Perry County232
- Pope County229
- Hardin County228
- Jefferson County227
- Union County226
- Jackson County224
- Pulaski County219
- Alexander County218
- Massac County212
The latest severe thunderstorm watches
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 2:57 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 29 more | 9 hr |
| Aug 19, 9:42 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 7 hr |
| Aug 18, 2:48 PM CDT | Severe Thunderstorm Watch | SPC | Jo Daviess, Stephenson | 6 hr |
| Aug 13, 12:30 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Coles, DeWitt, Douglas, Edgar, Ford and 11 more | 6 hr |
| Aug 13, 5:47 AM CDT | Severe Thunderstorm Watch | SPC | Hancock, Henderson, McDonough, Mercer, Warren | 6 hr |
| Aug 12, 2:24 PM CDT | Severe Thunderstorm Watch | SPC | Edwards, Wabash | 5 hr |
| Aug 12, 6:41 AM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, Cook, DeKalb, DeWitt, DuPage and 31 more | 6 hr |
| Aug 11, 7:22 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Champaign, Cook, DeKalb and 32 more | 6 hr |
| Aug 10, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 2 more | 7 hr |
| Aug 9, 8:43 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more | 7 hr |
| Aug 9, 9:46 AM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Lake, McHenry | 6 hr |
| Aug 7, 1:40 PM CDT | Severe Thunderstorm Watch | SPC | Rock Island | 8 hr |
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.