The July 21, 1987 tornado
F4Teton County, Wyoming
An F4 tornado on a 24.3-mile path. It was one of 19 tornadoes recorded in the U.S. that day, 2 of them rated F3/EF3 or stronger.
Watch how it happenedF4 tornado · July 21, 1987
How it happened
Follow the tornado’s recorded path from touchdown to lift-off.
The tornado
- Rating
- F4
- Fujita scale
- Path length
- 24.3 mi
- Width up to 2,550 yards
- Killed
- 0
- Along the whole path
- Injured
- 0
- Along the whole path
- Date and time
- Tuesday, July 21, 1987
- 1:50 PM MST
Counties on its path
Storm Prediction Center severe weather database. Path drawn as a straight line from the recorded start to end point.