On Dec. 2, 2024, huge, towering waves appeared in the sky above Montreal, Que. The clouds, called Kelvin-Helmholtz clouds, form when a layer of faster-moving wind sits above a layer of slower-moving ...

On June 24, 1947, pilot Kenneth Arnold reported seeing multiple mysterious, gleaming circular objects along the crest of the Cascade Mountains in Washington. It was one of the most famous UFO ...

Gravity wave clouds form in wave-like patterns in sky, oftentimes resembling ripples in a body of water from a rock being thrown. These types of clouds are created from air in the atmosphere coming ...

A woman in Calgary, Alberta, Canada, saw a strange, wavy cloud in the sky on Feb. 22, 2025, and took to X, formerly known as Twitter, to crowdsource an answer. "Does anyone know what is happening here ...

Before, during and after strong thunderstorms, you often get a variety of interesting cloud types. Last week was no exception, and you all captured things perfectly. The shelf cloud isn't exactly rare ...

WHIDBEY ISLAND STATION, Wash. — Residents of and near Whidbey Island witnessed a weather phenomenon on Tuesday as "wave clouds" lined the horizon. Kelvin-Helmholtz clouds or fluctus clouds, as the ...

SOUTH BOSTON, Va. (WSET) — Many folks reached out to me and ABC13 about some impressive-looking clouds. Many across Southside Virginia and in Richmond witnessed these formations on Tuesday afternoon.

FARGO — Sometimes clouds form in parallel lines; long, straight lines of clouds with clear sky in between. These clouds have several names; billow clouds or buoyancy clouds, but their technical name ...

A rare formation called asperitas clouds appeared over the Santa Barbara Channel in Southern California on Nov. 15. NPS Emily Zivot Channel Islands National Park A rare, wave-like cloud formation ...