From sun dogs to fallstreak holes, rare clouds are appearing over Houston.

A Channel Islands National Park ranger on Wednesday boated across the channel beneath a sky that appeared wavier than the ocean. The agency featured two images of the surreal-looking cloud formations ...

TRI-CITIES, Tenn. (WJHL) — News Channel 11 viewers captured stunning, rare clouds in the Tri-Cities Sunday. The formations are called “undulatus asperatus,” which loosely translates to roughened or ...

If you’ve ever looked up and seen the sky rippling like a stormy sea, you may have witnessed one of the most dramatic and rare cloud formations in the atmosphere: asperitas clouds. With their dark, ...