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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
Sunset reflected on an icy lake, spotted at Twin Lakes Recreation Area, Columbia, Missouri, US
Altocumulus floccus resembling a bird with its wings spread, spotted over Meinohama Fishing Port, Fukuoka City, Japan
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A unique juxtaposition of the sun and the clouds between Zagreb and Rijeka, Croatia
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A poetic display of Altocumulus in the evening sky over Modbury Heights, Adelaide, South Australia, Australia
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Stratocumulus in the distance, spotted near Qom City, Iran
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A view of a full rainbow, along with a faint secondary bow, spotted near Crank, Merseyside, England
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A display of Cirrus over Dehradun, India
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A flock of birds with a spotlight from the sky, observed during an ordinary moment, from a local supermarket parking lot in Medford, Massachusetts, US
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Cirrus fibratus spotted over Brisbane, Australia
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Iridescence spotted over Mar, Cantabria, Spain
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A majestic sky influenced by the wind and the mountains in Torres del Paine Park, Patagonia, Chile
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A chasm in the sky over Napoopoo Beach Park, Hawaii, US
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Nimbostratus spotted over Urbiel del Castillo, Spain
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Archer, Florida, US
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Altocumulus radiatus spotted over Omak, Washington, US
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Cumulus fractus drifting above a lower layer of clouds, spotted over Torrejón de Ardoz, Spain
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Altocumulus lenticularis duplicatus spotted over the Alps Mountains, near Wagrain, Austria
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Sunset over Dubai, United Arab Emirates
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Sunset with Altocumulus perlucidus over Modbury Heights, Adelaide, South Australia, Australia
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Altocumulus lenticularis spotted in the early morning over Mission Mountain Range near Ronan, Montana, US
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A 'bird' in flight spotted over Estrella Foothills, Arizona, US
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Stratocumulus spotted over Lisboa, Portugal
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Early evening view, following rain in São Paulo City, Brazil
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Altocumulus spotted over the McDowell Mountains, Scottsdale, Arizona, US
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A rainbow with a faint secondary bow spotted over Stratford-upon-Avon, England
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A plethora of optical phenomena, inclusive of a 22-degree halo, sun dogs, an upper tangent arc, and a sun pillar that leads upwards towards signs of a faint and rare v-shaped Moilanen arc, spotted by John's friend, Natalie Tercek, at sunrise before a day of skiing at Mt. Hood Meadows, Oregon, US.
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A dynamic, sideways-appearing Altocumulus lenticularis spotted over Fagurholsmyri, Iceland
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Remnants of contrails spotted over Tucson, Arizona, US
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Sunrise with crepuscular rays over Oakland, California, US
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Precipitation beginning to reach the ground, spotted near sunset over Westbury sub Mendip, Somerset, England
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Altocumulus spotted during the early evening over Fujian, China
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Sunset over Godrevy Lighthouse, Cornwall, England
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Multiple examples of Altocumulus lenticularis spotted near Portobello, Scotland
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Sunset over Fukuoka City, Japan
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Crepuscular rays spotted at sunrise over the Atlantic Ocean, near Boca Raton, Florida, US
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Sunset over the Pacific Ocean, near Barra de Navidad, Mexico
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A dynamic sky with Cirrocumulus undulatus and vivid iridescence, spotted over Acadiana Regional Airport, New Iberia, Louisiana, US
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Cumulus fractus spotted over Khomeynishahr City, Esfahan, Iran
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Altocumulus floccus resembling a bird with its wings spread, spotted over Meinohama Fishing Port, Fukuoka City, Japan
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A unique juxtaposition of the sun and the clouds between Zagreb and Rijeka, Croatia
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A poetic display of Altocumulus in the evening sky over Modbury Heights, Adelaide, South Australia, Australia
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Stratocumulus in the distance, spotted near Qom City, Iran
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A view of a full rainbow, along with a faint secondary bow, spotted near Crank, Merseyside, England
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A display of Cirrus over Dehradun, India
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A flock of birds with a spotlight from the sky, observed during an ordinary moment, from a local supermarket parking lot in Medford, Massachusetts, US
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Cirrus fibratus spotted over Brisbane, Australia
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Iridescence spotted over Mar, Cantabria, Spain
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A majestic sky influenced by the wind and the mountains in Torres del Paine Park, Patagonia, Chile
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A chasm in the sky over Napoopoo Beach Park, Hawaii, US
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Nimbostratus spotted over Urbiel del Castillo, Spain
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Altocumulus stratiformis undulatus, also known as a 'mackerel sky', spotted over Archer, Florida, US
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Altocumulus radiatus spotted over Omak, Washington, US
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Cumulus fractus drifting above a lower layer of clouds, spotted over Torrejón de Ardoz, Spain
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