Prior to severe thunderstorms in Cumberland and Sampson counties Sunday evening, some of you saw a unique cloud formation.

Have you ever seen a ceiling of clouds with bumpy, pouch-like formations hanging down? Those are called "mammatus clouds." FOX Weather Meteorologist Ari Sarsalari explains how they form and whether ...

Prior to severe thunderstorms in Cumberland and Sampson counties Sunday evening, some of you saw a unique cloud formation. Mammatus clouds will sometimes form within the anvil of a thunderstorm.