A wall cloud, the lowering seen in this video, is often the first visible stage of tornado formation. If you watch closely, ...

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 ...

A wall cloud with weak rotation was spotted in southeast Oklahoma City Tuesday afternoon, according to a storm chaser monitoring the system. Tom Pastrano reported seeing rising scud clouds and ...