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Other Clouds
- Arcus
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- 'Supercilium' (not official classification)
- Translucidus
- Tuba / Twister
- Uncinus
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- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
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- Halos
- Helic arc
- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- Moonbow
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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 morning view of Altocumulus floccus and undulatus, spotted over Athens, Georgia, US
Cirrocumulus undulatus spotted over Conwy, North Wales
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An abundant display of Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Great Asby, Cumbria, England
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Altocumulus undulatus resembling fingers waving from the sky, spotted over Goodyear, Arizona, US
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Cirrostratus spotted during the afternoon over São Paulo City, Brazil
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A plethora of Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted over Morpeth, Northumberland, England
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Signs of asperitas and supercilium spotted during a morning drive from Charlottesville to Culpepper, Virginia, US
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Altocumulus undulatus over El Dorado Hills, California, US
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Altocumulus lenticularis spotted shortly before sunset over Madison, Wisconsin, US
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Stratocumulus undulatus with signs of asperitas, spotted over Kuna, Idaho, US
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Asperitas over Gracioza Island, near Sao Jorge Island, Azores, Portugal
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Altocumulus undulatus spotted over Weston Longville, near Norwich, England
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A developing storm near Tucson, Arizona, US
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Altocumulus undulatus spotted over Tucson, Arizona, US
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Signs of supercilium, an unofficial classification of a short-lived cloud feature that is likened to an eyebrow and usually forms in turbulent air flow over, and to the immediate lee of, steep mountain peaks. This example was spotted over Antwerp, Belgium.
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Altocumulus undulatus over Calderdale, West Yorkshire, England
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