Clouds, Snow or Waterfalls on the Bighorns?

About noon on Sunday the Bighorn Mountains to the south of Sheridan took on an unusual appearance. What may have looked like snow or waterfalls coming off the tops of the mountains to some were actually clouds that appeared to roll off the mountain giving this unusual view.

Clouds, Snow or Waterfalls on the Bighorns?
Clouds, Snow or Waterfalls on the Bighorns?