20 Spectacular and Bizarre Weather Phenomena that really exist - Mammatus clouds are cloud pouches that form and hang underneath the base of a cloud. When air and clouds holding different levels of moisture mix, the heavier one sinks below the lighter.
"Smeared skies, Lake Ontario, Canada" It’s one of a series by photographer Matt Molloy. His “timestack” technique uses timelapse video footage to create a single still where the clouds look like brushstrokes.
Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees. (a/k/a Sun Doggies)
Super-cell Lightning, Snyder, Nebraska Under a super-cell thunderstorm, a "wall cloud" or "pedestal cloud" may form. This is frequently associated with tornadoes and micro-bursts. Here, a "cloud-to-ground" lightning bolt strikes from a wall cloud.