Kelvin Helmholtz clouds are named after the two scientists who studied the physics behind them A rare cloud formation resembling waves in the sky has been seen across North Yorkshire. The billowy ...

With the way the sky conditions look Thursday night ... Northern Lower Michigan and the Upper Peninsula look to have pretty ...

A rare cloud formation resembling waves in the sky has been seen across North Yorkshire. The billowy phenomenon was captured on camera in Cawthorn on Tuesday night by a BBC weather watcher.