Alert archive / Illinois / Severe Thunderstorm Warnings / 2011
Severe Thunderstorm Warnings in Illinois, August 2011
64 severe thunderstorm warnings 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 warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in August 2011. Tap one for its archive.
- Severe Thunderstorm Warnings
- 64
- Busiest day
- August 13, 201123 severe thunderstorm warnings
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, 5:36 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry | 54 min |
| Aug 2, 5:56 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kane, Lake, McHenry | 70 min |
| Aug 2, 7:59 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle, Winnebago | 61 min |
| Aug 2, 8:39 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Cook, DeKalb, DuPage, Kane, Lake and 1 more | 66 min |
| Aug 2, 9:11 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 64 min |
| Aug 2, 9:18 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, Kendall, Will | 72 min |
| Aug 2, 9:33 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Grundy, Kendall, LaSalle, Lee | 57 min |
| Aug 2, 10:01 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, LaSalle, Will | 59 min |
| Aug 2, 10:07 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 68 min |
| Aug 2, 10:52 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois, Kankakee, Will | 68 min |
| Aug 2, 11:15 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston, Will | 41 min |
| Aug 3, 12:08 AM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 52 min |
| Aug 5, 1:41 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Randolph, Saint Clair, Washington | 49 min |
| Aug 6, 11:38 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Union | 52 min |
| Aug 7, 12:08 AM CDT | Severe Thunderstorm Warning | PAH | Alexander, Johnson, Pulaski, Union | 22 min |
| Aug 7, 12:27 AM CDT | Severe Thunderstorm Warning | PAH | Alexander, Johnson, Massac, Pulaski, Union | 54 min |
| Aug 7, 12:57 AM CDT | Severe Thunderstorm Warning | PAH | Massac, Pope | 54 min |
| Aug 7, 1:14 AM CDT | Severe Thunderstorm Warning | DVN | Hancock, Henderson, McDonough, Mercer, Rock Island, Warren | 61 min |
| Aug 7, 1:17 AM CDT | Severe Thunderstorm Warning | PAH | Hardin, Johnson, Massac, Pope | 28 min |
| Aug 7, 1:55 AM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Mercer, Rock Island, Whiteside | 50 min |
| Aug 7, 12:56 PM CDT | Severe Thunderstorm Warning | LSX | Randolph | 34 min |
| Aug 7, 3:40 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, McHenry | 47 min |
| Aug 8, 1:51 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry, Whiteside | 39 min |
| Aug 8, 5:17 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Henry | 28 min |
| Aug 8, 5:23 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Stark | 67 min |
| Aug 8, 5:50 PM CDT | Severe Thunderstorm Warning | DVN | Bureau, Putnam | 25 min |
| Aug 8, 5:57 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Peoria, Stark, Tazewell, Woodford | 46 min |
| Aug 12, 5:23 PM CDT | Severe Thunderstorm Warning | DVN | Stephenson | 22 min |
| Aug 12, 5:25 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph | 50 min |
| Aug 12, 6:17 PM CDT | Severe Thunderstorm Warning | LOT | Ogle, Winnebago | 58 min |
| Aug 12, 7:03 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Ogle | 57 min |
| Aug 13, 10:46 AM CDT | Severe Thunderstorm Warning | LOT | Winnebago | 59 min |
| Aug 13, 11:29 AM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, McHenry, Ogle, Winnebago | 46 min |
| Aug 13, 12:55 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake, McHenry | 50 min |
| Aug 13, 2:12 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 63 min |
| Aug 13, 2:17 PM CDT | Severe Thunderstorm Warning | DVN | Putnam | 13 min |
| Aug 13, 2:23 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle | 67 min |
| Aug 13, 2:31 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 34 min |
| Aug 13, 2:48 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, DuPage, Kane, Kendall, Will | 57 min |
| Aug 13, 2:51 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell | 39 min |
| Aug 13, 2:54 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Will | 41 min |
| Aug 13, 3:05 PM CDT | Severe Thunderstorm Warning | ILX | Marshall, Woodford | 16 min |
| Aug 13, 3:30 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Tazewell, Woodford | 45 min |
| Aug 13, 3:46 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Menard, Morgan, Sangamon | 37 min |
| Aug 13, 3:51 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Logan, McLean, Mason, Tazewell | 35 min |
| Aug 13, 3:54 PM CDT | Severe Thunderstorm Warning | ILX | Morgan, Sangamon | 66 min |
| Aug 13, 3:59 PM CDT | Severe Thunderstorm Warning | ILX | McLean | 61 min |
| Aug 13, 4:24 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 66 min |
| Aug 13, 4:31 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Piatt | 59 min |
| Aug 13, 4:34 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 56 min |
| Aug 13, 4:35 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Macon | 55 min |
| Aug 13, 5:08 PM CDT | Severe Thunderstorm Warning | ILX | Christian, Shelby | 55 min |
| Aug 13, 6:01 PM CDT | Severe Thunderstorm Warning | ILX | Edgar | 44 min |
| Aug 18, 2:52 PM CDT | Severe Thunderstorm Warning | PAH | Johnson, Massac, Pope | 23 min |
| Aug 18, 3:48 PM CDT | Severe Thunderstorm Warning | PAH | Edwards, Wayne | 27 min |
| Aug 18, 4:14 PM CDT | Severe Thunderstorm Warning | PAH | Edwards, Wabash, Wayne, White | 30 min |
| Aug 18, 5:54 PM CDT | Severe Thunderstorm Warning | PAH | Alexander | 36 min |
| Aug 20, 8:10 AM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 65 min |
| Aug 20, 8:53 AM CDT | Severe Thunderstorm Warning | LOT | Boone, Lake, McHenry | 37 min |
| Aug 20, 9:25 AM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake, McHenry | 65 min |
| Aug 20, 2:10 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 50 min |
| Aug 23, 9:05 AM CDT | Severe Thunderstorm Warning | ILX | Knox, Marshall, Peoria, Stark | 29 min |
| Aug 23, 1:02 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Woodford | 43 min |
| Aug 24, 6:59 PM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 31 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- McHenry County9
- Cook County8
- DeKalb County7
- Will County7
- Boone County6
- Lake County5
- Ogle County5
- Winnebago County5
- DuPage County5
- Iroquois County5
- Kane County4
- Kendall County4
- Grundy County4
- Johnson County4
- Massac County4
- Bureau County4
- Marshall County4
- Tazewell County4
- Woodford County4
- McLean County4
- Lee County3
- LaSalle County3
- Kankakee County3
- Randolph County3
- Union County3
- Alexander County3
- Pope County3
- Henry County3
- Stark County3
- Peoria County3
- Monroe County2
- Pulaski County2
- Mercer County2
- Rock Island County2
- Whiteside County2
- Putnam County2
- Morgan County2
- Sangamon County2
- DeWitt County2
- Logan County2
28 more counties
- Edwards County2
- Wayne County2
- Ford County1
- Livingston County1
- Clinton County1
- Saint Clair County1
- Washington County1
- Jackson County1
- Hancock County1
- Henderson County1
- McDonough County1
- Warren County1
- Hardin County1
- Stephenson County1
- Cass County1
- Menard County1
- Mason County1
- Piatt County1
- Macoupin County1
- Montgomery County1
- Macon County1
- Christian County1
- Shelby County1
- Edgar County1
- Wabash County1
- White County1
- Knox County1
- Vermilion 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. Rebuilt daily.