Alert archive / Illinois / Severe Thunderstorm Watches
Severe Thunderstorm Watches in Illinois, 2025
21 severe thunderstorm watches in 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 watches reaches back to 1997.
Severe Thunderstorm Watches by county
Each county as a circle sized by its count in 2025. Tap one for its archive.
- Severe Thunderstorm Watches
- 21
- Busiest month
- July6 severe thunderstorm watches
- Busiest day
- April 29, 20252 severe thunderstorm watches
Over time
By month
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 |
|---|---|---|---|---|
| Mar 14, 6:55 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 22 more | 8 hr |
| Apr 4, 5:07 PM CDT | Severe Thunderstorm Watch | SPC | Edwards, Franklin, Hamilton, Jefferson, Perry, Randolph and 4 more | 6 hr |
| Apr 10, 2:22 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 5 hr |
| Apr 29, 8:56 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clinton, Fayette, Jackson, Madison and 8 more | 6 hr |
| Apr 29, 1:29 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Crawford, Edwards, Franklin, Gallatin, Hamilton and 13 more | 4 hr |
| May 8, 12:25 PM CDT | Severe Thunderstorm Watch | SPC | Gallatin, Hardin, Massac, Pope | 8 hr |
| May 16, 2:28 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Gallatin, Hardin, Johnson, Massac, Pope and 4 more | 9 hr |
| May 16, 5:47 PM CDT | Severe Thunderstorm Watch | SPC | Ford, Grundy, Iroquois, Kankakee, Livingston | 3 hr |
| Jun 3, 4:41 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Boone, Brown, Bureau, Carroll, DeKalb and 22 more | 6 hr |
| Jun 8, 2:30 PM CDT | Severe Thunderstorm Watch | SPC | Calhoun, Greene, Jersey, Pike | 8 hr |
| Jul 11, 1:17 AM CDT | Severe Thunderstorm Watch | SPC | Henderson, Mercer, Rock Island, Warren | 3 hr |
| Jul 11, 2:19 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Pike | 8 hr |
| Jul 16, 12:37 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 17 more | 5 hr |
| Jul 20, 6:09 PM CDT | Severe Thunderstorm Watch | SPC | Christian, Clark, Clay, Crawford, Cumberland, Edwards and 6 more | 4 hr |
| Jul 24, 2:31 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Cook, DuPage, Ford, Grundy, Iroquois and 13 more | 5 hr |
| Jul 28, 10:07 PM CDT | Severe Thunderstorm Watch | SPC | Mercer, Rock Island | 6 hr |
| Aug 15, 2:16 PM CDT | Severe Thunderstorm Watch | SPC | Carroll, Henry, Jo Daviess, Mercer, Rock Island, Whiteside | 6 hr |
| Aug 15, 6:46 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Knox, LaSalle, Lee, Marshall, Ogle and 6 more | 2 hr |
| Aug 16, 1:56 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Kane, Kendall and 6 more | 5 hr |
| Aug 18, 12:13 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 15 more | 9 hr |
| Nov 18, 4:28 PM CST | Severe Thunderstorm Watch | SPC | Alexander, Massac, Pulaski | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bureau County6
- LaSalle County6
- Ogle County6
- Putnam County6
- Boone County5
- Carroll County5
- Cook County5
- DeKalb County5
- DuPage County5
- Grundy County5
- Kane County5
- Kendall County5
- Lee County5
- Mercer County5
- Rock Island County5
- Stephenson County5
- Whiteside County5
- Will County5
- Winnebago County5
- Massac County5
- Henry County4
- Jo Daviess County4
- Kankakee County4
- Lake County4
- McHenry County4
- Warren County4
- Alexander County4
- Gallatin County4
- Hardin County4
- Pope County4
- Pulaski County4
- Henderson County3
- Edwards County3
- Wabash County3
- Johnson County3
- Saline County3
- Union County3
- Williamson County3
- Ford County3
- Iroquois County3
44 more counties
- Livingston County3
- Marshall County3
- Peoria County3
- Pike County3
- Stark County3
- Hancock County2
- McDonough County2
- Franklin County2
- Hamilton County2
- Jefferson County2
- Perry County2
- Randolph County2
- Washington County2
- Wayne County2
- White County2
- Clay County2
- Crawford County2
- Jasper County2
- Lawrence County2
- Richland County2
- Adams County2
- Brown County2
- Knox County2
- Tazewell County2
- Woodford County2
- Bond County1
- Clinton County1
- Fayette County1
- Jackson County1
- Madison County1
- Marion County1
- Monroe County1
- Saint Clair County1
- Fulton County1
- Schuyler County1
- Calhoun County1
- Greene County1
- Jersey County1
- Christian County1
- Clark County1
- Cumberland County1
- Effingham County1
- Shelby County1
- McLean County1
The busiest days
Days with the most alerts issued, by UTC date.
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.