Rain Sails are common over Las Vegas in the Monsoon Season. Small clusters of rain clouds pour their badly needed rain upon the valley floor far below as do the very large and angry storms. The rain sails, or shafts, always look beautiful to me as seen from the ground, in two of these photos, those sails are at about the same altitude as the aircraft. Lovely! I really miss the fun of flight, and of couse my family in Michigan.