Tornado record · Original Fujita scale
F3 tornado, Dubuque County, Iowa, September 9, 1970
RatingF3
Deaths0
Injuries0
Length4.7 mi
Width300 yd
Path
Drawn as a straight line from the recorded start point (42.50, -90.67) to the end point (42.55, -90.58), which is all NOAA's record holds. The real track may have curved.
The record
- Date
- September 9, 1970, 5:25 PM (as recorded, Central Standard Time)
- Rating
- F3
- States
- Iowa
- Counties
- Dubuque County
- Path
- 4.7 miles long, up to 300 yards wide
- Casualties
- 0 deaths, 0 injuries
Other tornadoes on September 9, 1970
| Date | Rating | State | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| Sep 9, 1970 | F2 | Iowa | 1.9 mi | 200 yd | 0 | 0 |
| Sep 9, 1970 | F2 | Iowa | 2.3 mi | 150 yd | 0 | 0 |
| Sep 9, 1970 | F2 | Iowa | 1 mi | 100 yd | 0 | 0 |
| Sep 9, 1970 | F2 | Wisconsin | 15.7 mi | 200 yd | 0 | 0 |
| Sep 9, 1970 | F2 | Illinois, Wisconsin | 14.3 mi | 70 yd | 0 | 0 |
| Sep 9, 1970 | F1 | Kentucky | 0.1 mi | 10 yd | 0 | 2 |
| Sep 9, 1970 | F1 | Wisconsin | 7.8 mi | 200 yd | 0 | 0 |
Tornado history nearby
Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025.