Alert archive / Illinois / Tornado Warnings / 2017
Tornado Warnings in Illinois, May 2017
11 tornado warnings in May 2017. 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 tornado warnings reaches back to 1986.
Tornado Warnings by county
Each county as a circle sized by its count in May 2017. Tap one for its archive.
- Tornado Warnings
- 11
- Busiest day
- May 18, 20176 tornado 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 10, 7:43 PM CDT | Tornado Warning | ILX | Macon, Piatt | 32 min |
| May 17, 4:40 PM CDT | Tornado Warning | DVN | Mercer, Rock Island | 50 min |
| May 17, 7:00 PM CDT | Tornado Warning | DVN | Henderson, Mercer, Warren | 45 min |
| May 17, 8:05 PM CDT | Tornado Warning | DVN | Henry, Mercer, Rock Island | 40 min |
| May 17, 8:46 PM CDT | Tornado Warning | DVN | Bureau, Henry, Whiteside | 23 min |
| May 17, 9:54 PM CDT | Tornado Warning | LOT | Lee, Ogle | 21 min |
| May 17, 10:04 PM CDT | Tornado Warning | LOT | Boone, Winnebago | 26 min |
| May 17, 10:22 PM CDT | Tornado Warning | LOT | Boone, McHenry | 23 min |
| May 26, 4:35 PM CDT | Tornado Warning | LOT | Ford, Iroquois, Livingston | 40 min |
| May 26, 5:10 PM CDT | Tornado Warning | ILX | Champaign, Vermilion | 35 min |
| May 27, 4:23 PM CDT | Tornado Warning | PAH | Massac, Pope | 16 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Mercer County3
- Rock Island County2
- Henry County2
- Boone County2
- Macon County1
- Piatt County1
- Henderson County1
- Warren County1
- Bureau County1
- Whiteside County1
- Lee County1
- Ogle County1
- Winnebago County1
- McHenry County1
- Ford County1
- Iroquois County1
- Livingston County1
- Champaign County1
- Vermilion County1
- Massac County1
- Pope County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20162018
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.