There's only been one EF4 tornado in Wyoming history and it happened in the summer of 1987. It was a rare monster high-altitude tornado that carved a path of damage from the Teton Wilderness through Yellowstone National Park.
Natural disasters are not part of the normal Grand Valley culture, but still, I couldn't help but wonder which is more likely to occur in Grand Junction, an earthquake or a tornado.
When you think of tornado country you might think of Oklahoma or Texas, but it turns one Colorado county has had more tornadoes in the last half century than any county in the nation.