Tornado record · Enhanced Fujita scale
EF1 tornado, Boone County, Illinois, May 17, 2017
RatingEF1
Deaths0
Injuries0
Length10.3 mi
Width100 yd
Path
Drawn as a straight line from the recorded start point (42.33, -88.82) to the end point (42.44, -88.68), which is all NOAA's record holds. The real track may have curved.
The record
- Date
- May 17, 2017, 9:21 PM (as recorded, Central Standard Time)
- Rating
- EF1
- States
- Illinois
- Counties
- Boone County, McHenry County
- Path
- 10.3 miles long, up to 100 yards wide
- Casualties
- 0 deaths, 0 injuries
Other tornadoes on May 17, 2017
| Date | Rating | State | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| May 17, 2017 | EF2 | Illinois | 1.29 mi | 50 yd | 0 | 1 |
| May 17, 2017 | EF1 | Nebraska | 2.19 mi | 50 yd | 0 | 0 |
| May 17, 2017 | EF1 | Nebraska | 0.37 mi | 50 yd | 0 | 0 |
| May 17, 2017 | EF1 | Iowa | 3.22 mi | 25 yd | 0 | 0 |
| May 17, 2017 | EF1 | Wisconsin | 1.06 mi | 250 yd | 0 | 0 |
| May 17, 2017 | EF1 | Iowa | 5.95 mi | 40 yd | 0 | 0 |
| May 17, 2017 | EF1 | Iowa | 2.14 mi | 25 yd | 0 | 0 |
| May 17, 2017 | EF1 | Illinois | 8.11 mi | 150 yd | 0 | 0 |
| May 17, 2017 | EF1 | Illinois | 2.06 mi | 50 yd | 0 | 0 |
| May 17, 2017 | EF0 | Iowa | 0.02 mi | 10 yd | 0 | 0 |
| May 17, 2017 | EF0 | Iowa | 0.02 mi | 10 yd | 0 | 0 |
| May 17, 2017 | EF0 | Minnesota | 0.79 mi | 30 yd | 0 | 0 |
| May 17, 2017 | EF0 | Illinois | 0.71 mi | 25 yd | 0 | 0 |
| May 17, 2017 | EF0 | Iowa | 0.2 mi | 30 yd | 0 | 0 |
| May 17, 2017 | EF0 | Minnesota | 0.26 mi | 30 yd | 0 | 0 |
Tornado history nearby
Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025.