What a day, 12 deg to start in Ft Collins, then the wind as I headed north later in the morning toward Cheyenne WY. Had crosswinds and headwinds up to 60mph to fight through the mountains over the continental divide. Saw a couple trucks blown over and completely off the highway. Here is a cellphone shot of Elk Mountain, the wind blowing about 75mph on the mountain, from right to left. Even with those winds there will appear to be very little movement as the clouds form on the windward side and dissipate rapidly on the leeward. The nice smooth cloud on top is a near perfect example of a lenticular cloud, pilots will recognize that as a sure sign to stay well away from the mountain, or to be at an altitude much higher.
