Alert archive / Illinois / Severe Thunderstorm Warnings / 2015
Severe Thunderstorm Warnings in Illinois, August 2015
35 severe thunderstorm warnings in August 2015. 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 2015. Tap one for its archive.
- Severe Thunderstorm Warnings
- 35
- Busiest day
- August 18, 201511 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, 1:54 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, DuPage, Kane | 51 min |
| Aug 2, 2:21 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 39 min |
| Aug 2, 2:35 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 25 min |
| Aug 2, 2:58 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 17 min |
| Aug 2, 8:49 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 26 min |
| Aug 2, 9:11 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 64 min |
| Aug 2, 9:18 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Rock Island | 27 min |
| Aug 2, 9:42 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Lake, McHenry | 63 min |
| Aug 2, 10:15 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane, McHenry | 45 min |
| Aug 2, 10:28 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 32 min |
| Aug 2, 10:44 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 31 min |
| Aug 2, 10:54 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane | 66 min |
| Aug 2, 11:00 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 9 min |
| Aug 2, 11:22 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kendall, Will | 53 min |
| Aug 9, 7:35 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 55 min |
| Aug 9, 8:23 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Monroe, Saint Clair, Washington | 52 min |
| Aug 9, 8:29 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair, Washington | 46 min |
| Aug 9, 8:34 PM CDT | Severe Thunderstorm Warning | PAH | Jackson, Perry | 41 min |
| Aug 9, 8:35 PM CDT | Severe Thunderstorm Warning | LSX | Clinton, Jersey, Macoupin, Madison, Saint Clair | 40 min |
| Aug 10, 3:38 PM CDT | Severe Thunderstorm Warning | LOT | DuPage | 37 min |
| Aug 15, 3:47 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 28 min |
| Aug 17, 4:35 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 26 min |
| Aug 18, 3:13 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 23 min |
| Aug 18, 3:14 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Knox | 46 min |
| Aug 18, 3:14 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun, Jersey | 46 min |
| Aug 18, 4:26 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Rock Island | 64 min |
| Aug 18, 4:33 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Mason | 42 min |
| Aug 18, 4:39 PM CDT | Severe Thunderstorm Warning | LSX | Macoupin, Montgomery | 51 min |
| Aug 18, 4:51 PM CDT | Severe Thunderstorm Warning | ILX | Fulton, Peoria | 39 min |
| Aug 18, 5:02 PM CDT | Severe Thunderstorm Warning | LSX | Bond, Madison, Montgomery | 43 min |
| Aug 18, 5:19 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Stark | 29 min |
| Aug 18, 5:24 PM CDT | Severe Thunderstorm Warning | LSX | Fayette, Montgomery | 51 min |
| Aug 18, 6:19 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle, Livingston | 56 min |
| Aug 18, 7:36 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kankakee, Kendall, Will | 39 min |
| Aug 18, 8:20 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 25 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Cook County11
- DuPage County6
- Saint Clair County4
- Kane County3
- Rock Island County3
- Lake County3
- McHenry County3
- Kendall County3
- Monroe County3
- Fulton County3
- Montgomery County3
- Henry County2
- Will County2
- Randolph County2
- Clinton County2
- Washington County2
- Jersey County2
- Macoupin County2
- Madison County2
- Peoria County2
- Grundy County2
- DeKalb County1
- Jackson County1
- Perry County1
- Iroquois County1
- Warren County1
- Knox County1
- Calhoun County1
- Mercer County1
- Mason County1
- Bond County1
- Stark County1
- Fayette County1
- LaSalle County1
- Livingston County1
- Kankakee County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20142016
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.