Alert archive / Illinois / Severe Thunderstorm Watches / 2024
Severe Thunderstorm Watches in Illinois, August 2024
6 severe thunderstorm watches in August 2024. 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 August 2024. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- August 27, 20242 severe thunderstorm watches
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 1, 12:07 PM CDT | Severe Thunderstorm Watch | SPC | Clay, Crawford, Edwards, Gallatin, Hamilton, Jasper and 6 more | 7 hr |
| Aug 5, 5:52 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Carroll, DeKalb, Grundy, Jo Daviess, Kane and 9 more | 8 hr |
| Aug 15, 5:45 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Franklin, Gallatin, Hamilton, Hardin, Jackson and 10 more | 5 hr |
| Aug 15, 9:08 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, DeWitt, Fulton, Hancock, Henderson, Henry and 15 more | 6 hr |
| Aug 27, 12:04 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Lake, McHenry, Winnebago | 2 hr |
| Aug 27, 5:09 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Boone County3
- LaSalle County3
- McHenry County3
- Winnebago County3
- Gallatin County2
- Hamilton County2
- Saline County2
- White County2
- DeKalb County2
- Grundy County2
- Kane County2
- Kankakee County2
- Kendall County2
- Lee County2
- Ogle County2
- Will County2
- Livingston County2
- Lake County2
- Clay County1
- Crawford County1
- Edwards County1
- Jasper County1
- Lawrence County1
- Richland County1
- Wabash County1
- Wayne County1
- Carroll County1
- Jo Daviess County1
- Stephenson County1
- Alexander County1
- Franklin County1
- Hardin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pope County1
- Pulaski County1
- Union County1
24 more counties
- Williamson County1
- Bureau County1
- DeWitt County1
- Fulton County1
- Hancock County1
- Henderson County1
- Henry County1
- Knox County1
- Logan County1
- McDonough County1
- McLean County1
- Marshall County1
- Mason County1
- Mercer County1
- Peoria County1
- Putnam County1
- Stark County1
- Tazewell County1
- Warren County1
- Woodford County1
- Cook County1
- DuPage County1
- Ford County1
- Iroquois County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20232025
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.