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Other Clouds
- Arcus
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- Cap / banner clouds
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- Cataractagenitus
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- Cavum (Fallstreak hole)
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- Duplicatus
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- Fractus
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- Mediocris
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- Praecipitatio
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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
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- 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
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- Helic arc
- Infralateral arc
- Iridescence
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- Moonbow
- Moondogs
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- 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 fragment of a Circumhorizon arc over San Juan Island, Washington State, US.
Mammatus (Mamma) at sunset over Hyderabad, India
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Cirrostratus over a layer of altocumulus, spotted shortly after sunset over the Jemez Mountains in Los Alamos, New Mexico, US
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A storm system spotted from the High Ridge Trail at Rock Bridge State Park, near Columbia, Missouri, US
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Remnants of a contrail over Sedro Woolley, Washington, US
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A vibrant sunrise over Brighton, Colorado, US
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Pileus are small, horizontal clouds that form above cumulus or cumulonimbus clouds, due to rising air that condenses into a smooth shape upon reaching its dew point, and this formation is usually an indicator of severe weather. This classic example was spotted over Bethesda, Maryland, US.
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Mammatus (Mamma) over Roermond, The Netherlands
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Sun Pillar during a heat wave in Madrid, Spain
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Asperitas and signs of lacunosus spotted over Tanti, Córdoba, Argentina
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A diamond shape in the sky, spotted over Sittingbourne, Kent, England
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Crepuscular rays emanating from behind a developing storm near Trentino Alto Adige, Peio, Italy
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Sky and surf near Seaside, Oregon, US
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Layers of clouds over Twisp, Washington, US
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An outline of a storm system over Dover, Delaware, US
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Stratocumulus spotted by Sree Bhasin on the road to Cottonwood Hot Springs, Colorado, US
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