Cloud codes and chart symbols

C_h1 Cirrus clouds is stands in the form of filament , stand or hook , not progressively invade the sky . Cirrus uncinus, cirrus fibratus C_h2 Dense cirrus, in patches or sheaves, which usually do not increase (spissatus); or cirrus with sprouting either in the form of small turrets or battlements (castellanus) or small cumuliform tufts (floccus). Cirrus spissatus, cirrus castellanus, cirrus floccus. C_h3 Dense cirrus, often in the form of an anvil, being the remains of the upper parts of a cumulonimbus cloud. Cirrus spissatus cumulonimbogenitus . C_h4 Cirrus is invading in the form of hook ( uncinus ) or filament ( fibratus ) progressively invade the sky , generally thicken as they do so . Cirrus uncinus , cirrus fibratus . C_h5 Cirrus, often in bands, with cirrostratus, or cirrostratus on its own, progressively invading the sky, and growing denser as it does so, but the continuous veil of cloud does not reach 45 degrees above the horizon. Cirrostratus C_h6 Cirrus is invading , often in band , with cirrostratus , or cirrostratus on its own , progressively invade the sky , and grow dense as it does so , with the continuous veil of cloud does extend more than 45 degree above the horizon although without the sky being totally cover . Cirrostratus C_h7 A veil of cirrostratus which covers the entire sky. Cirrostratus nebulous, cirrostratus fibratus C_h8 A veil of cirrostratus which neither cover the entire sky nor progressively invade it . Cirrostratus C_h9 Cirrocumulus appearing alone, or with cirrus and/or cirrostratus, as long as the cirrocumulus is predominant. Cirrocumulus stratiformis, cirrocumulus floccus, cirrocumulus lenticularis