A long, tubular cloud that appears to roll about a horizontal axis. Often forms along the leading edge of a storm front or gust front. Indicates a change in wind direction and can precede severe ...

Some cloud formations can look scary, and they can be a sign of a storm. Here's how they form and what they are.

There are different kinds of storm clouds that can be concerning and some that are not. Mammatus clouds can create quite the sight in the sky. They form the same way a typical funnel cloud does ...

MOLINE, Ill. — Storm clouds come in many shapes and sizes, but what about their colors? What can that tell us about a particular storm? That's a question John from Milan, Illinois, submitted ...

However, you can observe several atmospheric clues to identify whether a storm is intensifying or causing severe weather. Shelf clouds, also known as arcus clouds, are ominous, low-hanging clouds ...

Wall clouds are not as large or long as a shelf cloud, and look more like a column on the base of a storm cloud. The most important difference between the two is that a wall cloud is clearly ...