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 ...

PITTSBURGH (KDKA) - The viewer questions keep coming! Mark & Evelyn from Rostraver asked: "We once saw a huge roll cloud parallel to I-70 in Ohio east of Columbus. It was amazing, very clean looking, ...

Stunning photos and videos of the weather phenomenon were captured by beachgoers on Sunday, June 29 A rare phenomenon called a "roll cloud" covered Portugal beaches on Sunday, June 29 The tsunami-like ...

An interesting phenomenon unfolded Monday in the sky over Houston as nearly perfect rows of clouds were spotted. Video submitted to us by a subscriber showed the unmistakable appearance of what are ...

As much of Europe battled a rare heat wave, beachgoers trying to cool off on the coast of Portugal were stunned by another surprising weather phenomenon. Videos taken across parts of the northern and ...

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 picture of a cloud formation in Virginia that resembles rolling waves is going viral. Weather experts say this type of cloud formation, which was spotted in over Smith Mountain Lake near Roanoke, is ...