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Main Cloud Types
- Cumulus
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- Stratocumulus
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- 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
Altocumulus floccus viewed from above, at 35,000 feet over North Dakota, US
Cirrocumulus coupled with the remnants of contrails, spotted over Arlington, Washington, US
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Sun Dog (Parhelion) spotted over Erquy, Brittany, France
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Virga spotted over San Francisco, California, US
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An intricate web of undulatus, accompanied by signs of lacunosus, spotted over Lake Stevens, Washington, US
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A larger fallstreak hole (cavum) accompanied by a smaller one, spotted over Arlington, Washington, US
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Cirrus and Cirrostratus spotted over Seattle, Washington, US
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Cirrus fibratus spotted over Arlington, Washington, US
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Cirrus fibratus spotted over Arlington, Washington, US
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Stratocumulus visible at night with the moonlight, spotted near Neah Bay, Washington, US
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A morning view of cumulus, spotted from 30,000 feet above eastern Washington, US
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Valley fog as viewed from 5,500 feet above sea level, at Excelsior Peak, Washington, US
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A developing cumulonimbus spotted at 34,000 feet over western Oklahoma, US
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Contrails interwoven like DNA, spotted over Arlington, Washington, US
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A maple tree and a cirrus spissatus cloud formation, both with "fingers" extending outwards, as seen over Seattle, Washington, US
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A storm system over the Columbia River Valley, Washington, US
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