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Main Cloud Types
- Cumulus
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Other Clouds
- Arcus
- Asperitas
- Cap / banner clouds
- Capillatus
- Castellanus
- Cataractagenitus
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- Cavum (Fallstreak hole)
- Congestus
- Contrail (homogenitus)
- Duplicatus
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- Flammagenitus (Pyrocumulus)
- Floccus
- Fluctus (Kelvin-Helmholtz)
- Fractus
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- Intortus
- Lacunosus
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- Morning Glory Cloud
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- Mediocris
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- Noctilucent
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- Pileus
- Praecipitatio
- Radiatus
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- '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
Reflections of the sky via Albemarle Sound, Edenton, North Carolina, US
A unique juxtaposition of Altocumulus lenticularis and Fluctus (Kelvin-Helmholtz) spotted on the lee side of the Rocky Mountains in Berthoud, Colorado, US
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The first full moon of 2026, accompanied by remnants of contrails, spotted over Arnhem, The Netherlands
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A winter sunset over Irvine, California, US
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An exquisite sunset over the Puget Sound, spotted from Shoreline, Washington, US
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Sunset over Taylor, Texas, US
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A plethora of contrails criss-crossing the sky over Catforth, Lancashire, England
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Remnants of contrails infuenced by high level winds over Goodyear, Arizona, US
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Sunset filled with contrails (homogenitus) over Taylor, Texas, US
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Deurle, Belgium
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Altocumulus lenticularis duplicatus spotted over Pueblo, Colorado, US
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Mid-morning iridescence over Lebec, California, US
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An 'X' created by contrails over Falls Church, Virginia, US
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Sunrise over Oakland, California, US
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A contrail spotted across the sky over Edinburgh, Scotland
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A plethora of contrails near Washington National Airport, spotted from Falls Church, Virginia, US
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