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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
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).
Virga spotted over Hochsauerlandkreis, North Rhine-Westphalia, Germany
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Sunrise over Vermontville, Adirondacks, New York, US
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A view of low lying stratus in the valley, spotted by Bill's friend, Bill Buffie, from a funicular while traveling in Switzerland
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A mixed sky on a wintry afternoon near Cheddar Reservoir, Somerset, England
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Fluctus (Kelvin-Helmholtz) spotted over Isle of Harris, Scotland
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A fraction of a Circumzenithal Arc, with its 'upside-down' rainbow colours, visible via the confines of this cirrus cloud, spotted over Bayramiç, Çanakkale, Turkey
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Cumulus congestus taking on a look of a chick being hatched, spotted over Warsaw, Poland
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Altocumulus lenticularis spotted over Western Iran
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Reflections of the sky over Sacramento, California, US
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Fog along the Bieszczady Mountains, Poland
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Snow showers falling on Isle of Harris, Scotland
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Overcast near Ellesmere Port, Cheshire, England
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Sunset over Vermontville, Adirondacks, New York, US
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Following multiple weeks of rain, the blue sky was seen again over Blairgowrie, Perthshire, Scotland
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Circumzenithal Arc, also known as an 'upside-down rainbow', spotted by Richard's son, Graham Friedman, on a beautiful, calm day over Malibu, California, US
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