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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
Cumulus resembling a school of fish, spotted over Alexandria, Virginia, US
Altocumulus over Markazi Province, Iran
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Lightning strike captured via 30-second exposure, spotted near Kingman, Arizona, US
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A view of Cumulus congestus over Fuqing City, Fujian, China
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Cumulus fractus drifting across the sky over Noko Ferry Terminal, Fukuoka City, Japan
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'X' marks the spot in the contrails over Crank, Merseyside, England
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Cirrocumulus undulatus spotted over Port Hadlock, Washington, US
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Sunset over Chester, England
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Cirrostratus over Conwy, North Wales
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Supercilium, an unofficial cloud classification, spotted over Santa Cruz, California, US
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Rainbow spotted over Antwerp, Belgium
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Cumulonimbus illuminated by the setting sun, spotted over Munich, Germany
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Signs of a Cumulonimbus incus on the horizon, spotted near Charlo, Montana, US
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Fluctus (Kelvin-Helmholtz) spotted over Hutton Rudby, North Yorkshire, England
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Signs of Supercilium cloud formations spotted over Santa Cruz, California, US
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Supercilium, an unofficial cloud classification for features that are short-lived, often referred to as 'eyebrow clouds', spotted over Rio del Mar Beach, Aptos, California, US
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An expansive display of Cirrus uncinus over Prevost Harbor, Stuart Island, San Juan Islands, Washington, US
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A vivid display of Noctilucent observed from an airplane over Iceland
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Fluctus (Kelvin-Helmholtz) that looks like an octopus tentacle, spotted over Brighton, Colorado, US
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Stratus fractus drifting over Conwy, North Wales
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Altocumulus stratiformis undulatus, spotted in the late afternoon over Vermontville, Adirondacks, New York, US
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Monsoonal conditions above a passing freight train in this 30-second exposure photograph captured near Kingman, Arizona, US
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Contrails at dusk near the seaside of Zhejiang, China
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Cumulus congestus spotted near Trentishoe, Exmoor, England
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Cumulus fractus spotted over Mazandaran Province, Iran
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Altocumulus lenticularis spotted over Southsea Beach, Portsmouth, England
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Altocumulus over Markazi Province, Iran
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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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Altocumulus spotted over Golden Hill, San Diego, California, US
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Stormy sky over Petaling Jaya, Selangor, Malaysia
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The shadow of a developing cumulonimbus casted upon a lower layer of clouds, spotted near Dutton Ridge, Oregon, US
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Sunset near Rangeley, Maine, US
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Remnants of what appears to be a contrail, spotted over Blandford Forum, Dorset, England
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Stratocumulus over Venice, Italy
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Subtle signs of a Circumhorizon Arc spotted over Hallam, Victoria, Australia
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A layer of Stratocumulus over Toyohama, Fukuoka City, Japan
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Cirrostratus spotted over Nottingham, England
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Sun Dog (Parhelion) spotted over Conwy, North Wales
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Altocumulus over Markazi Province, Iran
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Lightning strike captured via 30-second exposure, spotted near Kingman, Arizona, US
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A view of Cumulus congestus over Fuqing City, Fujian, China
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Cumulus fractus drifting across the sky over Noko Ferry Terminal, Fukuoka City, Japan
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'X' marks the spot in the contrails over Crank, Merseyside, England
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Cirrocumulus undulatus spotted over Port Hadlock, Washington, US
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Sunset over Chester, England
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Cirrostratus over Conwy, North Wales
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Supercilium, an unofficial cloud classification, spotted over Santa Cruz, California, US
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Rainbow spotted over Antwerp, Belgium
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Cumulonimbus illuminated by the setting sun, spotted over Munich, Germany
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Signs of a Cumulonimbus incus on the horizon, spotted near Charlo, Montana, US
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Fluctus (Kelvin-Helmholtz) spotted over Hutton Rudby, North Yorkshire, England
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Signs of Supercilium cloud formations spotted over Santa Cruz, California, US
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Supercilium, an unofficial cloud classification for features that are short-lived, often referred to as 'eyebrow clouds', spotted over Rio del Mar Beach, Aptos, California, US
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