Then they notice a cloud formation that looks like a dolphin, or a boat, or letters of the alphabet. But few are fortunate enough to see Kelvin-Helmholtz clouds, which look like a pattern of ocean ...

Known as Kelvin-Helmholtz clouds, they form when a faster stream of air moves above rising air below. According to the Met Office website, Kelvin-Helmholtz clouds are "an extremely rare phenomenon".

Kelvin-Helmholtz instability creates beautiful wave-like cloud patterns in the sky, or billow clouds. Different layers of the atmosphere can have different densities with air moving at different ...

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 ...