For a brief moment, the sky over Bismarck turned into a series of snow-covered hills. A rare form of clouds blossomed over ...

TRI-CITIES, Tenn. (WJHL) — NewsNation affiliate WJHL viewers captured stunning, rare clouds in the Tri-Cities area of Tennessee on Sunday. The formations are called “undulatus asperatus ...

Residents in Larne woke up to the strange formations on Friday As the ... lenticularis meaning "lens-shaped", lenticular clouds are some of the rarest clouds and are often mistaken for UFOs.

UFO-shaped cloud displays have appeared over the sky in a rare sight for parts of the UK ... have previously been explained by these cloud formations. The symmetrical, smooth oval or round ...

Rare clouds could be seen from parts of the Highlands on Saturday afternoon. Called Kelvin Helmholtz, they resemble rolling ocean waves and similar patterns have been seen by astronomers on ...

People along the Antrim coast woke up to unusual cloud formations on Friday ... "lens-shaped", lenticular clouds are some of the rarest clouds and are often mistaken for UFOs.

who was also known as Lord Kelvin - studied the physics behind cloud formations. The Met Office said: "Kelvin Helmholtz clouds, or fluctus clouds, are quite rare. "These clouds are more likely to be ...