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Main Cloud Types
- Cumulus
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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
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- Morning Glory Cloud
- Murus (Wall cloud)
- Mediocris
- Nacreous
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- 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
An expansive display of Altocumulus spotted over Heswall, Wirral, England
A reflection of the sky captured near LaCrosse, Wisconsin, US
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A classic example of a Fallstreak Hole (Cavum) spotted at 2200 BST over Nutley, East Sussex, England
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Altocumulus stratiformis in the morning sky over Richmond, British Columbia, Canada
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Altocumulus stratiformis and low lying fog spotted at sunrise over Baskett Forest, near Ashland, Missouri, US
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Sunrise over Marinatown Seaside Park, Fukuoka City, Japan
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Fallstreak Hole (Cavum) spotted in the early morning over Greenfield, California, US
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A distrail slicing through Cirrocumulus stratiformis undulatus, spotted over Highland Lake, East Andover, New Hampshire, US
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Altocumulus stratiformis undulatus, spotted in the late afternoon over Vermontville, Adirondacks, New York, US
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Altocumulus stratiformis spotted over Sacramento, California, US
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A mixed sky over Dalton Highway, near Coldfoot, Alaska, US
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A colourful display of Altocumulus cloud formations, spotted over Lyle, Washington, US
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Altocumulus stratiformis spotted over Humboldt Bay, Eureka, California, US
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Signs of a Cavum (Fallstreak Hole) spotted over Sky Valley, California, US
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Altocumulus stratiformis spotted over Nord-Ostsee-Kanal in Sehestedt, Schleswig-Holstein, Germany
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Altocumulus stratiformis over Petaling Jaya, Selangor, Malaysia
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