Cloud Code Chart

LOW CLOUDS

CL1 - Cumulus humilis/fractus

CL2 - Cumulus mediocris/congestus

CL3 - Cumulonimbus calvus

CL4 - Stratocumulus cumulugenitus

CL5 - Stratocumulus

CL6 - Stratus nebulosus/fractus

CL7 - Stratus fractus / Cumulus fractus

CL8 - Cumulus / Stratocumulus

CL9 - Cumulonimbus capillatus

MIDDLE CLOUDS

CM1 - Altostratus translucidus

CM2 - Altostratus opacus / Nimbostratus

CM3 - Altocumulus translucidus

CM4 - Altocumulus lenticularis

CM5 - Altocumulus invading the sky

CM6 - Altocumulus cumulogenitus

CM7 - Altocumulus + Altostratus / Altocumulus + Nimbostratus

Altocumulus duplicatus

Altocumulus opacus

CM8 - Altocumulus castellanus / floccus

CM9 - Altocumulus of chaotic sky

HIGH CLOUDS

CH1 - Cirrus uncinus / fibratus

CH2 - Cirrus spissatus

CH3 - Cirrus spissatus cumulonimbogenitus

CH4 - Cirrus uncinus / fibratus invading the sky

CH5 - Cirrostratus below 45 deg.

CH6 - Cirrostratus above 45 deg.

CH7 - Cirrostratus covering the sky with halo effect

CH8 - Cirrostratus not covering the sky

CH9 - Cirrocumulus