Check Out one of the Rarest of all Clouds!!!
Most clouds occur in the lower part of the atmosphere called the troposphere. The troposphere extends upward to around 12 miles in the atmosphere, so almost every single cloud we ever see is contained in the bottom 12 miles of the atmosphere. The reason this occurs has to do with the fact that water vapor is really only contained in the troposphere and not the mid level statosphere, upper level mesosphere, or way out there in the thermosphere. With that said, every once in a while we see very rare clouds in the mesosphere that break the rule.



















