Jack's post today examines the Teton Tornado, a rare high-altitude F4 tornado that moved through northwest Wyoming 25 years ago this month on July 21, 1987. An F4 tornado produces devastating damage and has estimated winds of 207–260 mph.
|Blown down trees from the Teton Tornado. Source: Fujita (1989), photo|
by Brian Smith.
Click here to have a look at Jack's post.