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Other Clouds
- Arcus
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- Capillatus
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- 'Supercilium' (not official classification)
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- Uncinus
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- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
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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
Cavum (Fallstreak Hole), which is formed when part of the cloud layer forms ice crystals which are large enough to descend as a "fallstreak". They form in clouds of supercooled water droplets, which in the end, creates a form of virga, a trail of ice crystals that doesn’t reach the ground, but evaporates before getting that far. This classic example was spotted over Charlotte, Michigan, US.
A textured layer of stratocumulus over Somerset, England
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A colourful mosaic spotted near Tainan, Taiwan
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Cloud streets spotted at sunset near Vermontville, Adirondacks, New York, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', forms when stable, moist air flows over a large obstacle such as a mountain, creating waves that cause the clouds to form at the crests. In this classic example, there are multiple, stacked layers of these lens-shaped clouds, spotted over Torres Del Paine National Park, Patagonia, Chile.
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Cumulus congetus 'peeking' over the White Mountains and the Ancient Bristlecone Pine Forest in Inyo County, near Bishop, California, US
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A rainbow, created by sunlight that interacts with water droplets through the process of refraction, reflection, and dispersion, spotted over Forestville, California, US
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Altocumulus lenticularis duplicatus, also known as 'pile d'assiettes', spotted in the lee of Mount Pantokrator, Corfu, Greece
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An elongated version of Cirrus uncinus, spotted while looking east towards Southport, near Rufford, West Lancashire, England
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Signs of what appears to be a variation of an approaching arcus, ushering in inclement weather, spotted near Aberdyfi, Wales
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Undulatus spotted over Fowlmere, Cambridgeshire, England
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An arcus, also known as a shelf cloud, indicating a leading edge of a storm system, spotted near Malebelling, Western Australia, Australia
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Altocumulus stratiformis undulatus spotted over Google, East Riding of Yorkshire, England
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Cirrus vertebratus spotted over Busquistar, La Alpujarra, Andalucia, Spain
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22-degree halo with signs of a 46-degree halo, spotted over Chikkajala, Bangalore, India
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A cap cloud, a unique form of an Altocumulus lenticularis, spotted over Mount Jungfrau, Switzerland
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