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Main Cloud Types
- Cumulus
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- 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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- 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
Signs of homogenitus via contrails over Taylor, Texas, US
A trifecta of contrails spotted over Modbury Heights, Adelaide, South Australia, Australia
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A mixed sky following the passage of a typhoon, spotted from the Yangmingshan Observation Deck, Beitou, Taiwan
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A starfish captured by Valerie James near Bentworth, England
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Sunset over Twisp, Washington, US
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A developing cumulonimbus spotted from approximately 20,000 feet above Grand Rapids, Michigan, US
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Swirls in the sky over Yeongam-gun, South Jeolla Province, South Korea
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Within these cirrus clouds, Fran sees an angry orangutan in the sky over Cooma, New South Wales, Australia
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Segments of a 22-degree halo visible over Vancouver, British Columbia, Canada
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A cloud which Rachel said resembled a duck that morphed into a seahorse, spotted over North Dundas Township, Ontario, Canada
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Cirrostratus that reminded Lena of the bird Phoenix, spotted over Örebro, Sweden
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A vivid 22-degree halo spotted around mid-day over Singapore
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Iridescence by way of a layer of cirrostratus, with nearby cirrocumulus undulatus, spotted over Sumirago, Varese, Italy
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Circumhorizon Arc spotted during a hike in the Norwegian fjords, near Åndalsnes, Norway
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A 'rainbow' and a piano in the foreground, spotted on land, along with an expansive view of the sky over Hualien, Taiwan
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Sun Dog (Parhelion) spotted over Peel Castle, Isle of Man, British Crown Dependency
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