This picture is of stable formation that I think closely resembles a lenticular cloud formation. This is caused by laminar airflow over mountains and is indicated by its high formation and layers of smooth waves. This photo was taken on September 19th at 8:25am, from Longs peak facing west.

The skew-T shows a stable atmosphere overall, with airflow increasing with height. There is moist air lower down (around 500 mb) is likely where the cloud is just about to start and as air lifts into the stable layer (shown where temperature runs adiabatic) it condenses likely causing the lenticular cloud pictured above. The cloud likely starts to disappear around the 200mb as the temperature and dew point spread apart.

The Skew-T is from Salt lake because I felt this was a closer station to the cloud formation compared to Grand Junction.