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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
A fair-weather cloud day over the Petrified National Forest, Arizona, US.
Asperitas over Winnipeg, Manitoba, Canada
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Asperitas spotted over Surrey, British Columbia, Canada
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22-degree halo is seen as the sunlight is refracted through the ice crystals of thin layers of high clouds, such as cirrostratus in this case. Note how it 'ceases to exist' where there are no thin layers of clouds present. This example was spotted over Lake Stevens, Washington, US.
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Iridescence over New Taipei City, Taiwan
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Crepuscular rays over Khomeyni Shahr, Esfahan Province, Iran
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Mamma (Mammatus) accompanied by a thunderstorm near Brisbane, Australia
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Sunrise near Baltimore, Maryland, US
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Cumulus fractus over Dalin Village, near Sepidan City, Fars Province, Iran
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Iridescence over Taipei, Taiwan
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Stratocumulus over Panton, Jamaica
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Undulatus over Lake Stevens, Washington, US
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Crepuscular rays spotted over the green roof of a public library near Fayetteville, Arkansas, US
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A variety of altocumulus over New Taipei City, Taiwan
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A panoramic view of altocumulus stratiformis undulatus, also known as a mackerel sky, spotted over Brightstone, Isle of Wight, England
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Altocumulus lenticularis over the Adirondack Mountains, Vermontville, New York, US
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