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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
Pileus, also known as a cap cloud, can develop above rapidly rising cumulus or cumulonimbus clouds, as spotted here by Genevieve's father during an evening walk in Minneapolis, Minnesota, US
Sun Dog (Parhelion) spotted near Sherman, Illinois, US
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Altocumulus lenticularis spotted over western Iran
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22-degree halo spotted over Folsom, California, US
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A distrail bisecting the view of a 22-degree halo, spotted over Castel del Monte, Abruzzo, Italy
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Sunset over Conwy, North Wales
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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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