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Main Cloud Types
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Other Clouds
- Arcus
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- '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
Altocumulus stratiformis undulatus, as seen from above the clouds, on a flight over Fort Wayne Indiana, US
A classic example of a fallstreak hole (cavum) spotted amidst an expansive display of altocumulus clouds over Lot, Occitanie, France
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Multiple fallstreak holes (cavum) spotted over Sebastopol, California, US
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An expansive display of altocumulus over Mendip Hills, England
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Altocumulus stratiformis over New Taipei City, Taiwan
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", at sunrise over Wells, Somerset, England
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Stratus fractus below a layer of altocumulus clouds over New Taipei City, Taiwan
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Altocumulus with a variety of formations, including lacunosus, spotted during sunset over Baltimore, Maryland, US
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Altocumulus stratiformis and contrails at sunset over Columbus, Ohio, US
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A framed view of altocumulus stratiformis over Taipei, Taiwan
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Altocumulus over Taipei, Taiwan
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Altocumulus stratiformis over Temecula, California, US
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Altocumulus stratiformis, which is the most common type of altocumulus, spotted over Falls Church, Virginia, US
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Iridescence through the high altocumulus clouds over Woodbury, New Jersey, US
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A colorful sunrise over the Adirondack Mountains, Vermontville, New York, US
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Iridescence over New Taipei City, Taiwan
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