GREENSBORO, N.C. — Well, on days with widely scattered thunderstorms, you might capture a good view of a well-developed cumulonimbus tower in the distance. The upper portion of the cloud may ...

Anvil cloud: At the highest level of a mature thunderstorm, an anvil cloud will form. It is a flat, white cloud that spreads horizontally once it reaches the stratosphere and can no longer grow ...

Social media users were blown away by the unusual sighting, with one saying "I witnessed something like this in Oklahoma a few years ago, it's breathtaking." ...

While it is uncommon, lightning as much as 1 billion volts can strike between the anvil cloud aloft and the surface more than 10 miles away from the thunderstorm, endangering unsuspecting onlookers!

It is called the anvil, and clearly shows the ceiling of the tropopause, the boundary between the troposphere and the stratosphere which is the next layer of our atmosphere. This boundary can be ...

This image of a typical cumulonimbus cloud "anvil" was taken by the Expedition 16 crew on the International Space Station. The signature cauliflower shape of an overshooting top can be seen on the ...

A fuzzy white spot has appeared on its frigid blue cloud tops, 1.8 billion miles from the sun, and astronomers say it's probably a giant methane storm, something unimaginable on Earth.

Mammatus clouds are the billowy clouds that can sometimes form on the underside of a thunderstorm’s anvil cloud, or the flat, high-level clouds that spread outward from strong storms high in the ...

As storms were approaching Fort Worth on Monday, there were beautiful clouds in the skies. Mammatus clouds are on the underside of the anvil of the thunderstorm.

The anvil is the top of a cumulonimbus cloud. The temperatures up there are way below freezing and those clouds are glaciating and turning into ice crystals that then spread out into the anvil shape.

This horizontal spread develops into the anvil cloud. On the underside of the thunderstorm's anvil, you may sometimes notice these mammatus clouds, as they are more typically seen with strong ...