2018 was a crazy year for tornadoes in Wyoming. 3 EF3s occurred during the year in that state.
6/1/2018 Oriva Hills Subdivision EF3:
A 136 mph EF3 tornado moved through a subdivision of homes NW of Gillette. Numerous homes were damaged or destroyed and a dual-axle dump truck was tossed 250 yards.
6/6/2018 Laramie EF3:
This photogenic tornado moved through rural areas north of Laramie WY. Several steel poles were bent 90 degrees at the base and grass was scoured in a 1/3 mile wide swath. In some areas, grass was scoured to bare soil. This tornado was also accompanied by an EF2 satellite.
7/28/2018 Sheep Mountain EF3:
An intense tornado moved through rural areas on the northern slopes of the Laramie Mountains. Large cottonwood trees were stripped of all but the largest limbs while some smaller trees were partially debarked, a hut metal tractor building was completely destroyed with debris being carried off, and 7000 lb horse trailers were carried off with only one of the axles being found.
It's been a while since I've heard of violent tornadoes in Wyoming. I know Cheyenne was struck by an F3 back in the 70s that may actually have achieved F4 intensity, which is really impressive for a tornado that far west. I wonder what the most intense tornado recorded out west is (aside from the Grand Teton-Yellowstone tornado of 1987). Also, I didn't realize that grass/soil scouring was documented in some of these, really impressive for a western state tornado.