Clouds are divided into two major categories: streak and circulatory. These names separated the behavior of the clouds. The clouds are classified with the height of its foot, not the peak height. This system was proposed in 1802 by the Luke Howard Ascension Society.
Halloween
Light clouds
Algorithm
High-level
High-stack
This cloud is available up to 2,000m (6,500 ft) height and this class has level clouds (dense and gray). The surface of the layer cloud is actually called fog.
Clouds of the tribe include:
Stack (Cu)
Level (St)
Layer Structure (Sc)
Nerd-Level (Ns)
Nirad-Stack (Ns)
Source
This cloud can gain a strong upper-flux and can create many different shapes from the base.
Nirad-stack (lightning and heavy rain) (Cb)
Cumulonibus calvas
Cumulonibus incus
Cumulonibus with mammatus
Stack (Cu)
Cumulus congestus
Pyrocomulus
Source