
Rare wave clouds amaze sky-watchers in Wyoming
Stunned sky-watchers in the US state of Wyoming have snapped photos of a rare cloud formation crashing across the horizon like ocean surf. “This was special and I immediately knew I needed to capture it,” said local Rachel Gordon. The billowy phenomenon was visible on Tuesday above the crest of the Bighorn Mountains from the city of Sheridan. Known as Kelvin-Helmholtz instability, they form when a faster stream of air moves above rising air below. Ms Gordon, who told BBC News she took the images from her parents’ back door before posting them to the Facebook page Wyoming through The … Continue reading Rare wave clouds amaze sky-watchers in Wyoming