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Main Cloud Types
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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
Group two of the Cloud Appreciation Society Sky Holiday in Blachford Lake Lodge: Sarah Acland (Member 40874), Suzanne Cengia (Member 33510), Lucas Chen (Member 36273), Frank Corral, Laurie Ann Corral (Member 41099), Mark Donovan (Member 37083), Patrizia Donovan (Member 37084), Brian MacEachern, Anne Mattison (Member 38449), Barbara Richardson (Member 40896), Mark Richardson (Member 42827), William Tarr, Connie Tarr (Member 20744), Elyn Zimmerman (Member 25359).
Enjoying the view of the sky over calm waters, near the Hudson Riverfront in Dobbs Ferry, New York, US
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Reflecting on the concept of coincidence, James spotted these Cirrus 'horsetail' (mare's tail) clouds in the evening sky after he had spent several hours that day on horseback, traversing the hills and pastures adjacent to the Thompson River, Thompson-Nicola Valley, British Columbia, Canada
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A developing, robust storm near Antelope Valley, California, US
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A noteworthy storm approaching Tananger, Norway
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A myriad of clouds at sunset over Taylor, Texas, US
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A crossing of contrails that brings forth quadrants in the sky, spotted over Santa Rosa, California, US
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Altocumulus stratiformis spotted at sunset over Devanahalli, Bangalore, India
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A 'rainbow' and a piano in the foreground, spotted on land, along with an expansive view of the sky over Hualien, Taiwan
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Altocumulus spotted just prior to sunset over Oakland, California, US
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Fluctus (Kelvin-Helmholtz) spotted in the distance, over Windle, St Helens, Merseyside, England
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Sunset with various hues of orange and pink, spotted over Santa Rosa, California, US
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A peekaboo view of the sun over Taiwan
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A vibrant sky over Meizhou, Guangdong, China
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Stratocumulus over Kansai International Airport, Osaka, Japan
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Lacunosus, a short-lived formation, spotted over Island Beach State Park, New Jersey, US
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