Three different sub-categories of clouds all exist within the mid-level cloud umbrella: altocumulus (Ac), altostratus (As) and nimbostratus (Ns). As they are lower in altitude than the ones mentioned ...

Lenticular clouds, scientifically known as altocumulus lenticularis, are stationary, lens-shaped clouds that typically form at high altitudes in the atmosphere. They often have a striking ...