Mammatus Clouds over Nebraska Image Credit & Copyright: Jorn Olsen Photography
Mt Hood and a Lenticular Cloud - landscape, hood, lenticular, cloud.
rare cloud formations - Roll clouds- low, horizontal tube-shaped arcus cloud associated with a thunderstorm gust front, or sometimes a cold front. Roll clouds can also be a sign of possible microburst activity
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.
Mammatus Clouds Over Saskatchewan October 2015 via NASA Why is this cloud so bubbly? Normally, cloud bottoms are flat. The flatness is caused by moist warm air that rises and cools and so.