An unusually active severe weather event developed across the Four Corners states, particularly northern Arizona and southern Utah, beginning early on October 6. The most significant damage was in Bellemont, Arizona where houses and businesses were significantly damaged, a train was derailed and Camp Navajo was heavily damaged. Other tornadoes touched down but primarily remained over the open mountainous terrain in the very sparsely populated area. Tornado outbreaks are extremely rare west of the Rocky Mountains. The strongest tornado was rated EF3 on the Navajo Nation where metal transmission towers were heavily damaged, one of the strongest tornadoes ever recorded west of the Rockies.