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Main Cloud Types
- Cumulus
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- Stratocumulus
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- Cirrocumulus
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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
Mamma (Mammatus) tend to form on the underside of an incus associated with a cumulonimbus storm cloud. However, mamma cloud formations can occur on a range of cloud types, albeit usually following the passage of a storm. This example was spotted near Boca Raton, Florida, US.
Sunset with dynamic colours, along with crepuscular rays and shadows, spotted over Vermontville, Adirondacks, New York, US
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Signs of asperitas, which Ruth titled as 'Hot Lips', spotted near Bigfork, Montana, US
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Lunar corona spotted over Ahualoa on the windward coast of Hawaii Island, Hawaii, US
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Sunset filled with contrails (homogenitus) over Taylor, Texas, US
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A dissipating cumulonimbus with remnants of an incus, spotted from inside a bus near Mogi Mirim, Brazil
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Iridescence spotted over Krzeszowice, Poland
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A sun dog spotted amidst a colourful sky over Dalmatia, Croatia
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Crepuscular ray at sunrise over Wellington, Aotearoa, New Zealand
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A thick layer of Stratus envelopes the hillside, spotted by Suraiya Essof over Signal Hill, Cape Town, South Africa
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Signs of Fluctus (Kelvin-Helmholtz) spotted over Deurle, Belgium
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Reflections of the sky following a storm that ushered in significant flooding in parts of California, with this view spotted in Antelope Valley, California, US
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Virga spotted in the evening over Fujian, China
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Stratocumulus spotted over Flatland at Samora Correia, Portugal
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Cumulus mediocris spotted from Puget Sound, Seattle, Washington, US
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Altocumulus perlucidus spotted over Zhongzheng District, Taipei City, Taiwan
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