Alert archive / Illinois / Severe Thunderstorm Watches / 2011
Severe Thunderstorm Watches in Illinois, August 2011
7 severe thunderstorm watches in August 2011. 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 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 7
- Busiest day
- August 7, 20112 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 2, 5:22 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 9 hr |
| Aug 4, 8:06 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Pulaski | 4 hr |
| Aug 6, 10:14 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Hancock, Henderson, McDonough, Mercer and 3 more | 5 hr |
| Aug 7, 5:41 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Calhoun, Clinton, Edwards, Franklin and 23 more | 6 hr |
| Aug 8, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | Bureau, Champaign, DeWitt, Ford, Fulton, Grundy and 19 more | 5 hr |
| Aug 13, 12:12 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Clark, Coles, Cook, Cumberland and 32 more | 9 hr |
| Aug 24, 6:08 PM CDT | Severe Thunderstorm Watch | SPC | Bond, Brown, Calhoun, Cass, Champaign, Christian and 39 more | 6 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Ford County4
- Iroquois County4
- Kankakee County4
- Livingston County4
- Grundy County3
- LaSalle County3
- Champaign County3
- DeWitt County3
- Logan County3
- McLean County3
- Macon County3
- Menard County3
- Piatt County3
- Vermilion County3
- Cook County2
- DeKalb County2
- DuPage County2
- Kane County2
- Kendall County2
- Lake County2
- Lee County2
- McHenry County2
- Will County2
- Alexander County2
- Pulaski County2
- Brown County2
- McDonough County2
- Pike County2
- Bond County2
- Calhoun County2
- Clinton County2
- Jersey County2
- Madison County2
- Marion County2
- Monroe County2
- Saint Clair County2
- Washington County2
- Marshall County2
- Mason County2
- Peoria County2
56 more counties
- Tazewell County2
- Woodford County2
- Christian County2
- Clark County2
- Coles County2
- Cumberland County2
- Douglas County2
- Edgar County2
- Effingham County2
- Moultrie County2
- Sangamon County2
- Shelby County2
- Boone County1
- Ogle County1
- Winnebago County1
- Adams County1
- Hancock County1
- Henderson County1
- Mercer County1
- Rock Island County1
- Warren County1
- Edwards County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Hardin County1
- Jackson County1
- Jefferson County1
- Johnson County1
- Massac County1
- Perry County1
- Pope County1
- Randolph County1
- Saline County1
- Union County1
- Wabash County1
- Wayne County1
- White County1
- Williamson County1
- Bureau County1
- Fulton County1
- Knox County1
- Putnam County1
- Stark County1
- Cass County1
- Clay County1
- Crawford County1
- Fayette County1
- Greene County1
- Jasper County1
- Lawrence County1
- Macoupin County1
- Montgomery County1
- Morgan County1
- Richland County1
- Scott County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20102012
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.