Shelf clouds A low, horizontal, wedge-shaped cloud, usually associated with a thunderstorm gust front. Created by cold air from a thunderstorm downdraft spreading out and lifting warm, moist air.

Several Local 12 viewers around the Tri-State this weekend sent in photos of an oddly-shaped cloud asking for an explanation of what it is and how it forms.

This image shows an anvil shaped Cumulonimbus cloud at sunset in the Caribbean. When a cloud is maturing, or growing vertically, there comes a point when the air can no longer rise, ...

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 ...

HOUSTON — Anvil clouds can often look like an alien spacecraft trying to land, We’ve had emails suggesting there is a UFO in the sky and immediately when I see the picture, it’s an anvil cloud.

Spotters frequently mistake shelf clouds for wall clouds, so knowing how to tell them apart is important for storm spottyers. A wall cloud is an isolated cloud lowering attached to the rain-free base.

Flying high over the ground in a plane, a thunderstorm's anvil cloud might be the last thing you want to see, but it's exactly what a group of scientists conducting an airborne mission were ...

An amazing photo of a thunderstorm anvil cloud was snapped by scientists during a mission to study the thunderstorm environment and how it affects the chemistry of the atmosphere.

Drivers on their morning commute were treated to views of a massive, unusually-shaped cloud as the Sun rose over the Houston area Thursday morning. The aptly nicknamed anvil cloud towered over the ...

You may have spotted it over the mountains near Vancouver, B.C. or the Bellingham area - a strange looking cloud with a flat top that resembles a giant anvil.

A giant, anvil-shaped cloud bubbles up towards the Earth's stratosphere, looming over West Africa. The amazing formation would be invisible to anyone on the ground and would even be obscure from a ...

Flying high over the ground in a plane, a thunderstorm's anvil cloud might be the last thing you want to see, but it's exactly what a group of scientists conducting an airborne mission were looking ...