roll cloud

noun

, Meteorology.

1. arcus.
2. rotor cloud.

Example Sentences

The eerie phenomenon was a “roll cloud” that sometimes appears after a thunderstorm.

From Fox News

BBC weather expert Paul Hudson said the natural phenomenon was technically known as a roll cloud and was quite rare.

From BBC

In the six years since this Cleveland-based act released its self-titled debut album — a lo-fi set of messy rock ’n’ roll — Cloud Nothings has sharpened the focus of its songwriting and become one of America’s more thrilling noise-rock bands.

From New York Times

New images of a weird weather phenomenon known as a roll cloud have surfaced from Richland, Miss. The images, taken on a camera phone by Mississippi resident Daniel Blake Fitzhugh, reveal a seemingly endless roll cloud, or arcus cloud, a low cloud formation that forms over the sea or at the edges of thunderstorms.

From Scientific American

Fitzhugh sent in an image and video of the cloud to LiveScience after seeing an earlier report of a roll cloud off the coast of Brazil.

From Scientific American