Tornado record · Original Fujita scale
F3 tornado, Mercer County, Illinois, August 15, 1978
RatingF3
Deaths0
Injuries0
Length6.4 mi
Width77 yd
Path
Drawn as a straight line from the recorded start point (41.27, -90.78) to the end point (41.35, -90.70), which is all NOAA's record holds. The real track may have curved.
The record
- Date
- August 15, 1978, 7:00 PM (as recorded, Central Standard Time)
- Rating
- F3
- States
- Illinois
- Counties
- Mercer County, Rock Island County
- Path
- 6.4 miles long, up to 77 yards wide
- Casualties
- 0 deaths, 0 injuries
Other tornadoes on August 15, 1978
| Date | Rating | State | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| Aug 15, 1978 | F2 | Illinois | 2 mi | 100 yd | 0 | 0 |
| Aug 15, 1978 | F2 | Michigan | 0.8 mi | 333 yd | 0 | 1 |
| Aug 15, 1978 | F1 | Michigan | 0.5 mi | 50 yd | 0 | 2 |
| Aug 15, 1978 | F1 | Washington | 0.1 mi | 10 yd | 0 | 0 |
| Aug 15, 1978 | F1 | Michigan | 2.3 mi | 160 yd | 0 | 0 |
| Aug 15, 1978 | F0 | Wisconsin | 0.1 mi | 10 yd | 0 | 0 |
| Aug 15, 1978 | F0 | Texas | 0.5 mi | 30 yd | 0 | 0 |
| Aug 15, 1978 | F0 | Texas | 0.4 mi | 30 yd | 0 | 0 |
Tornado history nearby
Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025.