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.
Sometimes very ominous in appearance, mammatus clouds are harmless and do not mean that a tornado is about to form; a commonly held misconception. In fact, mammatus are usually seen after the worst of a thunderstorm has passed.
Fantastic night photo of Ireland and Britain from space.. (photo taken from 230 miles above - NASA)
The cloud with no name: Meteorologists suggest to classify these clouds as Asperatus clouds.
Fire rainbow cloud: The rare phenomenon appeared behind a storm cloud near Delray Beach, Florida
Moon over the clouds | Photography by Victor Caroli