GRAND RAPIDS, Mich. (WOOD) — Humidity hovering over the surface of Lake Michigan helped to form a spectacularly skinny roll cloud Monday afternoon over Ottawa County. Roll clouds are rare, usually ...

A rare phenomenon called a "roll cloud" covered Portugal beaches on Sunday, June 29 The tsunami-like formation shocked beachgoers, many of whom filmed the moment Scientists say the cloud was caused by ...

A viral video making the rounds on social media shows beachgoers in Portugal encountering an enormous and unnervingly tsunami-like cloud rolling in. Footage shows an enormous, foreboding wall of dark ...

After a back-to-back days of thunderstorms, we were treated to a beautiful sight as the sun set. As the storms moved out, a roll cloud moved in. Known for their low and horizontal cylindrical shape, ...

Images shared across social media showed a huge horizontal wall stretching from the horizon towards the shore, accompanied by a violent gust of wind when it reached land. 'Felt like a tsunami out of a ...

Beachgoers in Portugal scrambled for cover over the weekend as the sweltering heat gave birth to a rare “tsunami roll,” an ominous wave of dark clouds over the water. Viral video of Sunday’s ...

A rare weather sighting occurred in Portugal as tourists and locals witnessed a one-of-a-kind cloud in the sky in recent days. (See the video at the top of this article.) A "tsunami" roll, also known ...