Add Yahoo as a preferred source to see more of our stories on Google. Danielle Kinnamont filmed a white tornado-shaped cloud moving slowly through a field in Thurmont, Maryland, on May 5. During the ...

This photo of a rolling arcus cloud was taken on a ship off the coast of Brazil. While it looks menacing enough to fuel another 2012 end-of-the-world conspiracy, it’s also downright breathtaking.

In the summer months, the skies can fill up with a variety of interesting and unusual cloud formations, especially during stormy weather. Here’s a list of what to look for and what different clouds ...