The Cleveland NWS office captures this ominous photo of an arcus, or shelf cloud, over the city this week. PHOTO COURTESY NWS, Cleveland The Cleveland NWS office captures this ominous photo of an ...

Add Yahoo as a preferred source to see more of our stories on Google. A viral video has been bopping around, with scenes like a disaster movie, as beachgoers in Portugal begin to flee the beach when ...

The storms have moved offshore now, but in their wake, they left the perfect conditions for Mother Nature to show off a certain type of cloud. This cloud is known as a roll cloud. The National Weather ...

MADISON, Wis. - Both are ominous looking clouds that are sometimes present with thunderstorms and are often confused for each other. Let's take a look at a shelf cloud, a wall cloud and discuss how ...

SURF CITY, NC (WTVD) -- Incredible video was taken Sunday of a shelf cloud rolling in over the North Carolina coast. The time-lapse video was shot at Surf City. The cloud rolled in with a stormy ...

A dramatic cloud formation appeared in the skies of Maryland as severe thunderstorms ripped through the state. Footage showed a dark, low shelf cloud moving through the area while flash flood, ...