Alert archive / Illinois / Severe Thunderstorm Watches / 2011
Severe Thunderstorm Watches in Illinois, April 2011
7 severe thunderstorm watches in April 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 April 2011. Tap one for its archive.
- Severe Thunderstorm Watches
- 7
- Busiest day
- April 4, 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 |
|---|---|---|---|---|
| Apr 3, 8:11 PM CDT | Severe Thunderstorm Watch | SPC | Adams, Brown, Calhoun, Cass, Fulton, Greene and 12 more | 6 hr |
| Apr 3, 8:54 PM CDT | Severe Thunderstorm Watch | SPC | Boone, Cook, DeKalb, DuPage, Grundy, Kane and 9 more | 5 hr |
| Apr 9, 7:25 AM CDT | Severe Thunderstorm Watch | SPC | Edwards, Gallatin, Hamilton, Hardin, Johnson, Massac and 6 more | 6 hr |
| Apr 19, 3:11 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Bond, Brown, Calhoun, Cass, Christian and 30 more | 7 hr |
| Apr 22, 1:31 PM CDT | Severe Thunderstorm Watch | SPC | Edwards, Franklin, Gallatin, Hamilton, Jefferson, Saline and 4 more | 4 hr |
| Apr 23, 5:38 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Johnson, Pulaski, Union | 6 hr |
| Apr 27, 12:42 PM CDT | Severe Thunderstorm Watch | SPC | Alexander, Hardin, Johnson, Massac, Pope, Pulaski and 1 more | 5 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Johnson County3
- Pulaski County3
- Adams County2
- Brown County2
- Calhoun County2
- Cass County2
- Greene County2
- Morgan County2
- Pike County2
- Schuyler County2
- Scott County2
- Edwards County2
- Gallatin County2
- Hamilton County2
- Hardin County2
- Massac County2
- Pope County2
- Saline County2
- Wabash County2
- Wayne County2
- White County2
- Alexander County2
- Union County2
- Fulton County1
- Knox County1
- Marshall County1
- Mason County1
- Menard County1
- Peoria County1
- Stark County1
- Tazewell County1
- Woodford County1
- Boone County1
- Cook County1
- DeKalb County1
- DuPage County1
- Grundy County1
- Kane County1
- Kankakee County1
- Kendall County1
37 more counties
- Lake County1
- LaSalle County1
- Lee County1
- McHenry County1
- Ogle County1
- Will County1
- Winnebago County1
- Bond County1
- Christian County1
- Clark County1
- Clay County1
- Clinton County1
- Coles County1
- Crawford County1
- Cumberland County1
- Edgar County1
- Effingham County1
- Fayette County1
- Jasper County1
- Jersey County1
- Lawrence County1
- Macon County1
- Macoupin County1
- Madison County1
- Marion County1
- Monroe County1
- Montgomery County1
- Moultrie County1
- Randolph County1
- Richland County1
- Saint Clair County1
- Sangamon County1
- Shelby County1
- Washington County1
- Franklin County1
- Jefferson County1
- Williamson 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.