Alert archive / Illinois / Severe Thunderstorm Watches / 2021
Severe Thunderstorm Watches in Illinois, July 2021
6 severe thunderstorm watches in July 2021. 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 July 2021. Tap one for its archive.
- Severe Thunderstorm Watches
- 6
- Busiest day
- July 10, 20213 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 |
|---|---|---|---|---|
| Jul 9, 7:08 PM CDT | Severe Thunderstorm Watch | SPC | Hancock, Henderson, McDonough, Warren | 3 hr |
| Jul 10, 1:36 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Edwards, Franklin, Gallatin, Hamilton, Jackson and 10 more | 4 hr |
| Jul 10, 2:01 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Clay, Clinton, Crawford, Edwards and 28 more | 8 hr |
| Jul 14, 11:57 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, DeKalb, Grundy, Henry, Kane and 7 more | 3 hr |
| Jul 24, 3:32 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Cook, DeKalb, DuPage, Ford, Grundy and 17 more | 6 hr |
| Jul 29, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 18 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Bureau County3
- DeKalb County3
- Grundy County3
- Kane County3
- Kendall County3
- LaSalle County3
- Lee County3
- McHenry County3
- Putnam County3
- Alexander County2
- Edwards County2
- Franklin County2
- Gallatin County2
- Hamilton County2
- Jackson County2
- Jefferson County2
- Johnson County2
- Perry County2
- Pulaski County2
- Saline County2
- Union County2
- Wabash County2
- Wayne County2
- White County2
- Williamson County2
- Boone County2
- Ogle County2
- Winnebago County2
- Cook County2
- DuPage County2
- Ford County2
- Iroquois County2
- Kankakee County2
- Lake County2
- Livingston County2
- Will County2
- Hancock County1
- Henderson County1
- McDonough County1
- Warren County1
29 more counties
- Bond County1
- Clay County1
- Clinton County1
- Crawford County1
- Effingham County1
- Fayette County1
- Hardin County1
- Jasper County1
- Lawrence County1
- Madison County1
- Marion County1
- Massac County1
- Monroe County1
- Pope County1
- Randolph County1
- Richland County1
- Saint Clair County1
- Washington County1
- Henry County1
- McLean County1
- Marshall County1
- Peoria County1
- Stark County1
- Tazewell County1
- Woodford County1
- Carroll County1
- Jo Daviess County1
- Stephenson County1
- Whiteside County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.