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Main Cloud Types
- Cumulus
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- Stratocumulus
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- Cirrocumulus
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- Nimbostratus
- Cumulonimbus
Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
- Cauda (Tail cloud)
- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
- Diamond dust
- Distrail
- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
- Homogenitus
- Horseshoe vortex
- Humilis
- Incus
- Intortus
- Lacunosus
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- Mamma
- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
- Nebulosus
- Noctilucent
- Pannus
- Perlucidus
- Pileus
- Praecipitatio
- Radiatus
- Silvagenitus
- Spissatus
- Stratiformis
- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
- Undulatus
- Velum
- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
- Green flash
- Glory
- Halos
- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- Moonbow
- Moondogs
- Parhelic circle
- Parry antisolar arcs
- Parry arc
- Parry infralateral arc
- Parry supralateral arc
- Rainbow
- Sub parhelion
- Sub-sun
- Suncave parry arc
- Sun dog (Parhelion)
- Sun pillar
- Supernumerary bows
- Subparhelic circle
- Supralateral arc
- Upper tangent arc
- Wegener arc
A vibrant display of Cirrus unicnus, which in Latin means "curly hooks". This type of high-level cloud is also known as mares' tails, as spotted here over South Portland, Maine, US.
Cirrus vertebratus spotted over Hammersmith, West London, England
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Cirrus uncinus over Vermontville, New York, US
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Cirrus uncinus over Merano, Italy
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Cirrus vertebratus spotted over Crawley, West Sussex, England
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Fallstreak holes over Cotia, São Paulo, Brazil
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Cirrus spissatus over Fairy Meadow, New South Wales, Australia
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Cirrus uncinus over Diamond Bar, California, US
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A grand display of Cirrus vertebratus radiatus over Brean, Somerset, England
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A sky decorated with contrails (homogenitus), which form when it’s cold enough and moist enough at high altitudes, and the water vapour contained in the plane’s hot exhaust gases mixes with the very cold air to condense and form ice crystals, which took place here multiple times over Charente, France
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Circumzenithal Arc over Buzancy, France
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Cirrus uncinus over Malakwa, British Columbia, Canada
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Altocumulus volutus, also known as a Roll cloud, a unique formation that is produced by atmospheric gravity waves, spotted over The Ponds, New South Wales, Australia
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Cirrus uncinus over Broad Creek, Pamlico County, North Carolina, US
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Cirrus uncinus over Melksham, Wiltshire, UK
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A magnificent reflection of Cirrus radiatus over Svalbard, Norway
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