Clouds Formation

+ Species Cirrostratus fibratus (Cs fib): Fibrous cirrostratus less detached than cirrus.
+ Species Cirrostratus nebulosus (Cs neb): A featureless veil of cirrostratus.
• Middle (Family B)
Middle clouds tend to form at 6,500 ft (2,000 m) but may form at heights up to 13,000 ft (4,000 m), 23,000 ft (7,000 m) or 25,000 ft (8,000 m) depending on the region. Generally the warmer the climate, the higher the cloud base. Family B usually comprises one cumuliform and one stratiform-category genus.