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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 mixed sky over Mahajeran, Iran
Cirrostratus spotted during the late afternoon over São Paulo City, Brazil
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Stratocumulus spotted from the Scenic Rim, looking towards the hills on the outskirts of Brisbane, Queensland, Australia
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Cumulus congestus over Eastern Shore of Chesapeake Bay, Maryland, US
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Sun Dog (Parhelion) spotted over Erquy, Brittany, France
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A corona spotted through the trees during a morning hike at Fort Harrison State Park, Indiana, US
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Cirrus fibratus spotted over Yebes, Spain
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A picturesque sunset over The Big Tree near McBaine, Boone County, Missouri, US
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A lightning strike with Mammatus (Mamma) formations spotted over Antwerp, Belgium
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22-degree halo spotted over Rotterdam, The Netherlands
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Stratocumulus spotted over Springfield, Missouri, US
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Iridescence spotted over New Taipei City, Taiwan
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Reflections of Cumulus by way of the Fukuoka City Museum, Fukuoka City, Japan
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Stratocumulus spotted over Llandudno, North Wales
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Altocumulus floccus spotted over Rotterdam, The Netherlands
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Asperitas and lacunosus spotted shortly before a thunderstorm over Kassel, Germany
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Mammatus (Mamma) spotted near Gent St-Aandsberg, Belgium
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An approaching storm with its arcus leading the way, spotted over Springfield, Missouri, US
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A developing storm ushering in a change from hot, dry weather near Rothiemurchus, Scotland
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Altocumulus lenticularis with signs of lacunosus, spotted over the Chiricahua Mountains, near the Southwestern Research Station, Portal, Arizona, US
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Altocumulus floccus spotted over Heswall, Wirral, Merseyside, England
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Altocumulus perlucidus spotted over Conwy, North Wales
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Remnants of a contrail spotted over New Taipei City, Taiwan
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A long, feather-like cloud spotted over Napa, California, US
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Asperitas spotted over Somerset, England
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Altocumulus floccus perlucidus spotted over Terling, Essex, England
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Sun Dog (Parhelion) spotted near Sherman, Illinois, US
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Altocumulus lenticularis spotted over western Iran
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22-degree halo spotted over Folsom, California, US
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A distrail bisecting the view of a 22-degree halo, spotted over Castel del Monte, Abruzzo, Italy
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Sunset over Conwy, North Wales
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Crepuscular rays during sunrise over Sauerland, North Rhine-Westphalia, Germany
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Stratocumulus spotted over Winthrop, Washington, US
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Cumulus fractus spotted over Saint-Jerome, Quebec, Canada
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Sun Dog (Parhelion) spotted over Te Kuiti, New Zealand
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Asperitas with signs of lacunosus, spotted over Woodford Halse, Northamptonshire, England
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A colourful display of Cirrus spissatus spotted by Erland's granddaughter, Megan, near Paderborn, Germany
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Asperitas spotted over Malvern, Worcestershire, England
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A picturesque sunset spotted by David's son, Craig West, from Callerton, near Newcastle upon Tyne, England
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22-degree halo spotted over Cajeme, Sonora, Mexico
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Cirrostratus spotted during the late afternoon over São Paulo City, Brazil
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Stratocumulus spotted from the Scenic Rim, looking towards the hills on the outskirts of Brisbane, Queensland, Australia
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Cumulus congestus over Eastern Shore of Chesapeake Bay, Maryland, US
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Sun Dog (Parhelion) spotted over Erquy, Brittany, France
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A corona spotted through the trees during a morning hike at Fort Harrison State Park, Indiana, US
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Cirrus fibratus spotted over Yebes, Spain
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A picturesque sunset over The Big Tree near McBaine, Boone County, Missouri, US
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A lightning strike with Mammatus (Mamma) formations spotted over Antwerp, Belgium
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22-degree halo spotted over Rotterdam, The Netherlands
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Stratocumulus spotted over Springfield, Missouri, US
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Iridescence spotted over New Taipei City, Taiwan
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Reflections of Cumulus by way of the Fukuoka City Museum, Fukuoka City, Japan
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Stratocumulus spotted over Llandudno, North Wales
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Altocumulus floccus spotted over Rotterdam, The Netherlands
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Asperitas and lacunosus spotted shortly before a thunderstorm over Kassel, Germany
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