A principal cloud type, appearing as a white patch without shadows, found between the 10,000 and 30,000 foot levels. Multiple cirrocumulus will form what is termed a mackerel sky.
These clouds contain primarily ice crystals and contain thin white layers with a texture that makes them look like patches of cotton or ripples without shadows.
A high cloud that appears as a white patch of cloud without shadows. It consists of very small elements in the form of grains or ripples.
Thin , white patch , sheet or layer of cloud with out shading, composed of very small elements in the form of grains ,ripples, etc merged or separate, and more or less regularly arranged; most of the elements have an apparent width of less than one degree.
A cirriform cloud with vertical development, appearing as a thin sheet of small white puffs which give it a rippled effect. It often creates a "mackerel sky", since the ripples may look like fish scales. Sometimes it is confused with altocumulus, however, it has smaller individual masses and does not cast a shadow on other elements. It is also the least common cloud type, often forming from cirrus or cirrostratus, with which it is associated in the sky.
a high-level cloud which is composed mostly of ice crystals and has the appearance of a thin, white patch of rippled cloud
Cirrus clouds with vertical development.