Alert archive / Illinois / Severe Thunderstorm Watches / 2020
Severe Thunderstorm Watches in Illinois, July 2020
5 severe thunderstorm watches in July 2020. 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 2020. Tap one for its archive.
- Severe Thunderstorm Watches
- 5
- Busiest day
- July 9, 20202 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, 11:05 AM CDT | Severe Thunderstorm Watch | SPC | Henderson, Jo Daviess, Mercer, Rock Island, Warren | 8 hr |
| Jul 9, 3:39 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Henry, Knox, Lee and 9 more | 7 hr |
| Jul 11, 10:04 AM CDT | Severe Thunderstorm Watch | SPC | Henderson, Henry, Knox, Mercer, Rock Island, Stark and 1 more | 3 hr |
| Jul 11, 3:58 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Champaign, Coles, DeKalb and 35 more | 8 hr |
| Jul 19, 10:32 AM CDT | Severe Thunderstorm Watch | SPC | Cook, DuPage, Ford, Grundy, Iroquois, Kankakee and 3 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Henderson County3
- Mercer County3
- Rock Island County3
- Warren County3
- Henry County3
- Knox County3
- Stark County3
- Boone County2
- Bureau County2
- Carroll County2
- Lee County2
- Marshall County2
- Ogle County2
- Peoria County2
- Putnam County2
- Whiteside County2
- Winnebago County2
- Woodford County2
- Ford County2
- Grundy County2
- Kendall County2
- Livingston County2
- Jo Daviess County1
- Stephenson County1
- Champaign County1
- Coles County1
- DeKalb County1
- DeWitt County1
- Douglas County1
- Edgar County1
- Fulton County1
- Hancock County1
- Kane County1
- LaSalle County1
- Logan County1
- McDonough County1
- McLean County1
- Macon County1
- Mason County1
- Moultrie County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.