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Main Cloud Types
- Cumulus
- Stratus
- Stratocumulus
- Altocumulus
- Altostratus
- Cirrus
- Cirrocumulus
- Cirrostratus
- 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
- Lenticularis
- 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
Sunset over Godrevy Lighthouse, Cornwall, England
A dynamic sky with Cirrocumulus undulatus and vivid iridescence, spotted over Acadiana Regional Airport, New Iberia, Louisiana, US
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A translucent layer of Altocumulus providing a mesmerizing view during sunset over the Northeast Canadian High Arctic
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In this photograph set at a 25-second exposure, a freight train deploys a cloak of invisibility beneath Cirrostratus and contrails near Kingman, Arizona, US
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Portions of a corona spotted amidst the Cirrostratus over Arvada, Colorado, US
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Sun Dogs (Parhelia) spotted over Portage, Wisconsin, US
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Cirrostratus spotted above Bello, Antioquia, Colombia
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Altostratus spotted over Cologne, Germany
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Undulatus that Robyn thought looked like veins of a leaf, spotted over Goodyear, Arizona, US
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A portion of a 22-degree halo and a sun dog spotted over Wauconda, Illinois, US
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Altocumulus lenticularis spotted over Marbella, Spain
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A 'portal' to the sky spotted over Mount Pleasant, Pennsylvania, US
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Signs of a 22-degree help and a Sun Dog spotted shortly after sunrise over Madison, Wisconsin, US
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Signs of a Sun Dog (Parhelion) spotted over Lexington, Kentucky, US
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Parhelic Circle amidst the optical phenomena spotted over New York City, New York, US
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A plethora of optical phenomena spotted overlooking the East Big Thompson River, near Loveland, Colorado, US
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