Do you know what lenticular clouds are? "Lenticular, or lens-shaped, clouds form near mountains, where the rising air condenses to form the clouds, and the wind gives them their shape." There is an absolutely amazing one that appears 11 seconds into this time-lapse video of the southwest by photographer Tony Rowell. You should stick around for the rest, it's all pretty great (except for an appearance by the stupid moon), but at least check out that cloud.