Grand clouds: Unusual weather event enchants with odd, undulating clouds over Teton Range

http://trib.com/news/state-and-regional/grand-clouds-unusual-weather-event-enchants-with-odd-undulating-clouds/article_26f20a99-97e9-5bb8-8dd8-e57d85dad4ff.html

Drivers stopped along the park's main highway Thursday morning to gaze in awe and shoot photos of the rare phenomenon hovering over Grand Teton mountain. At 13,775 feet above sea level, the Grand Teton is the highest point in the Teton Range.
They were lenticular clouds, a type that forms downwind of mountain ranges in certain conditions. Occasionally, lenticular clouds occur as perfectly symmetrical disks, appearing like giant flying saucers and prompting UFO reports.
These particular lenticular clouds resulted from an unusual combination of strong wind and moisture between 13,000 and 14,000 feet, said Riverton-based National Weather Service meteorologist Chris Jones, who got wind of the event from several weather spotters.