Tornado record · Original Fujita scale
F1 tornado, Johnson County, Wyoming, June 20, 1977
RatingF1
Deaths0
Injuries0
Length0.1 mi
Width10 yd
Path
Drawn as a straight line from the recorded start point (43.52, -106.98) to the end point (43.52, -106.98), which is all NOAA's record holds. The real track may have curved.
The record
- Date
- June 20, 1977, 3:25 PM (as recorded, Central Standard Time)
- Rating
- F1
- States
- Wyoming
- Counties
- Johnson County
- Path
- 0.1 miles long, up to 10 yards wide
- Casualties
- 0 deaths, 0 injuries
Other tornadoes on June 20, 1977
| Date | Rating | State | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| Jun 20, 1977 | F2 | West Virginia, Maryland | 8.5 mi | 50 yd | 0 | 5 |
| Jun 20, 1977 | F1 | Wyoming | 2 mi | 20 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Wyoming | 0.1 mi | 10 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Wyoming | 0.1 mi | 10 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Florida | 2.6 mi | 20 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Kansas | 2.5 mi | 100 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Wyoming | 0.1 mi | 10 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Georgia | 2 mi | 100 yd | 0 | 0 |
| Jun 20, 1977 | F1 | Wyoming | 0.1 mi | 10 yd | 0 | 0 |
| Jun 20, 1977 | F0 | Colorado | 0.1 mi | 20 yd | 0 | 0 |
Tornado history nearby
Source: NOAA Storm Prediction Center severe weather database, 1950 to 2025.