Alert archive / Illinois / Severe Thunderstorm Watches / 2011
Severe Thunderstorm Watches in Illinois, May 2011
10 severe thunderstorm watches in May 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 May 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 10
- Busiest day
- May 11, 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 |
|---|---|---|---|---|
| May 7, 2:59 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Clark, Coles, DeWitt, Douglas, Edgar and 18 more | 7 hr |
| May 11, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cass, DeKalb, DeWitt and 33 more | 6 hr |
| May 11, 5:56 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Ford, Grundy and 12 more | 5 hr |
| May 13, 12:31 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 6 hr |
| May 23, 10:55 AM CDT | Severe Thunderstorm Watch | SPC | Alexander, Bond, Calhoun, Clinton, Edwards, Fayette and 27 more | 7 hr |
| May 23, 12:54 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Clark, Clay, Coles, Crawford and 13 more | 5 hr |
| May 24, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Greene, Jersey, Macoupin and 4 more | 5 hr |
| May 28, 2:25 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Clark, Coles, Crawford, Cumberland and 10 more | 5 hr |
| May 29, 8:53 AM CDT | Severe Thunderstorm Watch | SPC | Boone, Bureau, Carroll, Cook, DeKalb, DuPage and 33 more | 6 hr |
| May 31, 2:33 PM CDT | Severe Thunderstorm Watch | SPC | Champaign, Christian, Coles, Cook, DeWitt, Douglas and 21 more | 7 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Grundy County5
- Kendall County5
- LaSalle County5
- Champaign County4
- Coles County4
- DeWitt County4
- Douglas County4
- Edgar County4
- Ford County4
- Iroquois County4
- Kankakee County4
- Livingston County4
- McLean County4
- Macon County4
- Moultrie County4
- Piatt County4
- Vermilion County4
- Will County4
- Woodford County4
- Kane County4
- Clark County3
- Logan County3
- Marshall County3
- Peoria County3
- Tazewell County3
- Boone County3
- DeKalb County3
- Lee County3
- McHenry County3
- Ogle County3
- Winnebago County3
- Cook County3
- DuPage County3
- Lake County3
- Christian County3
- Shelby County3
- Bureau County2
- Carroll County2
- Fulton County2
- Hancock County2
62 more counties
- Henderson County2
- Henry County2
- Jo Daviess County2
- Knox County2
- McDonough County2
- Mercer County2
- Putnam County2
- Rock Island County2
- Stark County2
- Stephenson County2
- Warren County2
- Whiteside County2
- Alexander County2
- Hardin County2
- Johnson County2
- Massac County2
- Pope County2
- Pulaski County2
- Union County2
- Calhoun County2
- Greene County2
- Jersey County2
- Macoupin County2
- Madison County2
- Monroe County2
- Saint Clair County2
- Crawford County2
- Cumberland County2
- Effingham County2
- Jasper County2
- Sangamon County2
- Cass County1
- Mason County1
- Menard County1
- Morgan County1
- Schuyler County1
- Scott County1
- Bond County1
- Clinton County1
- Edwards County1
- Fayette County1
- Franklin County1
- Gallatin County1
- Hamilton County1
- Jackson County1
- Jefferson County1
- Marion County1
- Montgomery County1
- Perry County1
- Randolph County1
- Saline County1
- Wabash County1
- Washington County1
- Wayne County1
- White County1
- Williamson County1
- Clay County1
- Lawrence County1
- Richland County1
- Adams County1
- Brown County1
- Pike 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.