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Main Cloud Types
- Cumulus
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- Cumulonimbus
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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- Fibratus
- Flammagenitus (Pyrocumulus)
- Floccus
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- Fractus
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- Lacunosus
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- Mediocris
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- Noctilucent
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- Praecipitatio
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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
Fog lifting from over the water, with errant cumulus fractus drifting across the sky, spotted during a camping trip at Holland State Park, Holland, Michigan, US
A storm system with brief, yet notable, precipitation over Antelope Valley, California, US
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An image in the sky upon which Sarah wondered if it looked like either Charles Darwin or Mephistopheles, spotted over Newmarket, Suffolk, England
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Dramatic colours in the sky over Constantia, Cape Town, South Africa
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Sunset over Sierra Vista, Arizona, US
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While waiting for his flight at Hong Kong's International Airport, this framed view of a cumulus cloud seemed like a cartoonist's "thought bubble" coming out of the dormant volcano, wherein Steven wondered what it was thinking. This view was captured from inside the Hong Kong International Airport, Chek Lap Kok, Hong Kong.
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Signs of a horseshoe vortex spotted over Garrabost, Isle of Lewis, Scotland
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Crepuscular rays over Khomeynishahr City, Esfahan, Iran
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22-degree halo accompanied by what appears to be a subtle 46-degree halo, spotted over Shangri-La, Yunnan, China
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Signs of virga over Tintwistle Quarry, Derbyshire, England
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Cumulus dotting the sky with the backdrop of what appears to be the remnants of contrails over Orchard Park, New York, US
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A dissipating storm system at sunset over Sumirago, Varese, Italy
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Horseshoe vortex spotted in the early evening over Hereford, Arizona, US
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A plethora of cloud formations over Kamloops, British Columbia, Canada
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Iridescence upon clouds that take on a resemblance of a dog and a snack, spotted over Parole, Maryland, US
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Driving home, Heidi saw this cloud descending into the sunlight, over Vermont, US
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