Alert archive / Illinois / Severe Thunderstorm Warnings / 1987
Severe Thunderstorm Warnings in Illinois, May 1987
38 severe thunderstorm warnings in May 1987. 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 May 1987. Tap one for its archive.
- Severe Thunderstorm Warnings
- 38
- Busiest day
- May 22, 198720 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 |
|---|---|---|---|---|
| May 11, 4:58 PM CDT | Severe Thunderstorm Warning | LOT | Kane, McHenry | 62 min |
| May 11, 4:58 PM CDT | Severe Thunderstorm Warning | LOT | Lake | 62 min |
| May 11, 5:24 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage, Kane | 66 min |
| May 11, 5:32 PM CDT | Severe Thunderstorm Warning | ILX | Lee | 43 min |
| May 11, 5:42 PM CDT | Severe Thunderstorm Warning | ILX | DeKalb | 63 min |
| May 11, 6:20 PM CDT | Severe Thunderstorm Warning | LOT | Kendall, LaSalle | 55 min |
| May 11, 6:26 PM CDT | Severe Thunderstorm Warning | ILX | Peoria, Tazewell | 49 min |
| May 14, 2:54 PM CDT | Severe Thunderstorm Warning | LOT | Iroquois | 66 min |
| May 14, 4:55 PM CDT | Severe Thunderstorm Warning | ILX | Christian | 65 min |
| May 20, 9:44 AM CDT | Severe Thunderstorm Warning | ILX | Vermilion | 31 min |
| May 20, 5:10 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Mercer, Rock Island | 50 min |
| May 20, 5:30 PM CDT | Severe Thunderstorm Warning | ILX | Stark | 60 min |
| May 20, 6:20 PM CDT | Severe Thunderstorm Warning | ILX | Peoria | 35 min |
| May 20, 8:01 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 44 min |
| May 20, 9:02 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, LaSalle | 28 min |
| May 21, 6:39 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 21 min |
| May 21, 7:01 PM CDT | Severe Thunderstorm Warning | LSX | Monroe, Randolph, Saint Clair | 59 min |
| May 21, 7:12 PM CDT | Severe Thunderstorm Warning | LSX | Adams, Brown | 48 min |
| May 21, 7:25 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Pike, Scott | 50 min |
| May 21, 7:25 PM CDT | Severe Thunderstorm Warning | LSX | Calhoun | 50 min |
| May 21, 7:28 PM CDT | Severe Thunderstorm Warning | ILX | McDonough, Schuyler | 62 min |
| May 21, 8:10 PM CDT | Severe Thunderstorm Warning | LSX | Brown, Pike | 50 min |
| May 21, 8:10 PM CDT | Severe Thunderstorm Warning | LSX | Scott | 50 min |
| May 21, 8:27 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Morgan | 63 min |
| May 21, 8:42 PM CDT | Severe Thunderstorm Warning | DVN | Henry, Whiteside | 48 min |
| May 21, 8:57 PM CDT | Severe Thunderstorm Warning | LSX | Greene, Scott | 53 min |
| May 21, 9:00 PM CDT | Severe Thunderstorm Warning | ILX | Bureau, Stark | 60 min |
| May 21, 9:28 PM CDT | Severe Thunderstorm Warning | ILX | Lee | 47 min |
| May 21, 9:28 PM CDT | Severe Thunderstorm Warning | ILX | Cass, Morgan, Sangamon | 62 min |
| May 21, 9:28 PM CDT | Severe Thunderstorm Warning | ILX | Menard | 62 min |
| May 21, 9:47 PM CDT | Severe Thunderstorm Warning | ILX | McLean, Mason, Tazewell, Woodford | 58 min |
| May 21, 10:07 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 53 min |
| May 21, 10:09 PM CDT | Severe Thunderstorm Warning | ILX | Logan, Sangamon | 31 min |
| May 21, 10:09 PM CDT | Severe Thunderstorm Warning | ILX | DeWitt, Macon | 66 min |
| May 21, 11:06 PM CDT | Severe Thunderstorm Warning | ILX | Champaign, Vermilion | 54 min |
| May 21, 11:37 PM CDT | Severe Thunderstorm Warning | ILX | Winnebago | 23 min |
| May 30, 12:49 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois | 56 min |
| May 31, 6:41 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 64 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- LaSalle County4
- Henry County3
- Scott County3
- Kane County2
- Cook County2
- Lee County2
- Peoria County2
- Tazewell County2
- Iroquois County2
- Vermilion County2
- Stark County2
- Brown County2
- Greene County2
- Pike County2
- Cass County2
- Morgan County2
- Sangamon County2
- McHenry County1
- Lake County1
- DuPage County1
- DeKalb County1
- Kendall County1
- Christian County1
- Mercer County1
- Rock Island County1
- Grundy County1
- Monroe County1
- Randolph County1
- Saint Clair County1
- Adams County1
- Calhoun County1
- McDonough County1
- Schuyler County1
- Whiteside County1
- Bureau County1
- Menard County1
- McLean County1
- Mason County1
- Woodford County1
- Livingston County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive19861988
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.