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Main Cloud Types
- Cumulus
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- Cirrocumulus
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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
- 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
A host of lenticularis forming over Pingvallavatn Lake, Iceland.
Crepuscular rays during sunrise over Sauerland, North Rhine-Westphalia, Germany
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Stratocumulus spotted over Winthrop, Washington, US
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Cumulus fractus spotted over Saint-Jerome, Quebec, Canada
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Sun Dog (Parhelion) spotted over Te Kuiti, New Zealand
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Asperitas with signs of lacunosus, spotted over Woodford Halse, Northamptonshire, England
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A colourful display of Cirrus spissatus spotted by Erland's granddaughter, Megan, near Paderborn, Germany
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Asperitas spotted over Malvern, Worcestershire, England
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A picturesque sunset spotted by David's son, Craig West, from Callerton, near Newcastle upon Tyne, England
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22-degree halo spotted over Cajeme, Sonora, Mexico
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A developing storm near Bidford on Avon, Warwickshire, England
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Sunset over Taiwan
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Remnants of a contrail spotted over Seattle, Washington, US
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Cumulus fractus spotted over Esfahan, Iran
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Altocumulus spotted over Taipei, Taiwan
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An approaching storm system near Brisbane, Queensland, Australia
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