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Main Cloud Types
- Cumulus
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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
A classic example of a spaceship looking altocumulus lenticularis, captured by Richard's wife, Andrea Gessner Friedman, spotted over the foothills of the Catalina Mountains, Tucson, Arizona, US
Fluctus (Kelvin-Helmholtz), which Lars described as the biggest surf ever seen in Denmark, spotted over the Copenhagen airport, Denmark
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A cloud "flower" over the Salish Sea, spotted from Helliwell Provincial Park, Hornby Island, British Columbia, Canada
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As Rachel observed, someone pulled a rabbit out of the sunset, near North Dundas Township, Ontario, Canada
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An image of a bird within the clouds over Goodyear, Arizona, US
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Cirrus spissatus formation that looks like a "funnel cloud", spotted over Madison, Wisconsin, US
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A portal from the sky, reflected upon the water, near Crimea, Ukraine
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A developing cumulonimbus that Bob observed was capped with a black heart sitting in front of a silver heart, spotted on the Kapiti Coast, north of Wellington, New Zealand
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Cirrus spissatus that looked like an eagle ray or a stingray that Gary had just seen at the Aquarium near Auckland, New Zealand
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Altocumulus radiatus that reminded Helen of rising bubbles, spotted over Priddy, Somerset, England
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Altocumulus that looked to Marianne as if she was looking into the ocean instead of the sky, with the way whales and sharks have lots of small fish around them, cleaning them by eating away parasites. This was the view of the sky near Ronda, Andalusia, Spain.
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Sunrise upon which Paul noticed the look of a snail meandering across the sky, spotted over Brighton and Hove, England
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Cumulus clouds within which Junichi saw one that looked like Big Bird from the Sesame Street television show, spotted over Hakata Station, Fukuoka City, Japan
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A display of stratus fractus that has a resemblance to smoke coming from the top of the cypress tree, as Mimi relates, when she spotted this at sunset over Walnut Creek, California, US
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Layers of clouds within which Robyn observes a tiny animal face, spotted over Buckeye, Arizona, US
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Signs of lenticularis that Alan commented looks like a hen, spotted over Scotland
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