via Instagram http://ift.tt/1vipV8L
Feb 18, 2015
This rare display of lenticular clouds over #GrandTeton National Park (@grandtetonnps) in #Wyoming last week captivated park visitors. Lenticular (lens-shaped) clouds occur when stable, moist air flows over a mountain, creating a series of large-scale standing waves on the downwind side. Photo by Jackie Skaggs, #NationalPark Service. #weather by usinterior
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