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WMO classification of clouds

 

Genera Species Varieties Supplementary features & accessory clouds Mother-clouds
Genitus
Mother-clouds
Mutatus
Cirrus fibratus
uncinus
spissatus
castellanus
floccus
intortus
radiatus
vertebratus
duplicatus
mamma Cirrocumulus
Altocumulus
Cumulonimbus
Cirrostratus
Cirrocumulus stratiformis
lenticularis
castellanus
floccus
undulatus
lacunosus
virga
mamma
/
Cirrus
Cirrostratus
Altocumulus
Cirrostratus fibratus
nebulosus
duplicatus
undulatus
/
Cirrocumulus
Cumulonimbus
Cirrus
Cirrocumulus
Altostratus
Altocumulus stratiformis
lenticularis
castellanus 
floccus
translucidus
perlucidus 
opacus
duplicatus 
undulatus
radiatus
lacunosus

virga 
mamma
Cumulus
Cumulonimbus
Cirrocumulus
Altostratus
Nimbostratus
Stratocumulus
Altostratus
/
translucidus
opacus
duplicatus
undulatus
radiatus
virga
praecipitatio
pannus
mamma
Altocumulus
Cumulonimbus
Cirrostratus
Nimbostratus
Nimbostratus
/
/
praecipitation
virga
pannus
Cumulus
Cumulonimbus
Altocumulus
Altostratus
Stratocumulus
Stratocumulus stratiformis
lenticularis
castellanus
translucidus
perlucidus
opacus
duplicatus
undulatus 
radiatus
lacunosus
mamma
virga
praecipitatio
Altostratus
Nimbostratus
Cumulus
Cumulonimbus
Altocumulus
Nimbostratus
Stratus
Stratus nebulosus
fractus
opacus
translucidus
undulatus
praecipitatio Nimbostratus
Cumulus
Cumulonimbus
Stratocumulus
Cumulus humilis
mediocris
congestus
fractus
radiatus pileus
velum
virga
praecipitatio
arcus
pannus
tuba
Altocumulus
Stratocumulus
Stratocumulus
Stratus
Cumulonimbus calvus
capillatus
/
praecipitatio
virga
pannus
incus
mamma
pileus
velum
arcus
tuba
Altocumulus
Altostratus
Nimbostratus
Stratocumulus
Cumulus
Cumulus

 

Notes

1) Principle of classification, etymology and meaning of the Latin names are given in: Glossary of weather terms for clouds.
2) Mother-clouds other than those mentioned in the above table, may be observed, though seldom.
3) Genera are sorted in decreasing order of altitudes at which they are usually observed.
4) Species, varieties, supplementary features and accessory clouds are listed approximately in descending order of frequency of their occurrence; mother-clouds are listed in the same order as the genera.
5) Bold characters = abbreviations of genera, species, varieties, supplementary features & accessory clouds and mother-clouds. The names and abbreviations of the genera are always written with an initial capital.
6) Color scale: yellow = high level, orange = medium level, blue = low level.

 

Classification of clouds with their base height

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