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Other Clouds
- Arcus
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- Mediocris
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- 'Supercilium' (not official classification)
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- Tuba / Twister
- Uncinus
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- Vertebratus
- Virga
- Volutus (Roll cloud)
Optical Effects
- 22° Halo
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- Infralateral arc
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- Moondogs
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- 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
Nacreous clouds, forming at altitudes of 15-25 km (10–20 miles), up in the stratosphere, at temperatures of around -85˚C (-121˚F), these clouds show beautiful iridescent pastel hues as they scatter the light from the Sun when it is just below the horizon. Sometimes called ‘mother-of-pearl clouds’, their tiny, uniform ice crystals are very good at diffracting sunlight. This classic example was spotted in December of a prior year, over Nottingham Castle, Nottingham, England.
Cumulus mediocris "floating" over the fields near Greatham, Hampshire, England
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Virga via two distinct rows of clouds over Northern California, US
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Altocumulus lenticularis over Cooper Bay on the eastern side of South Georgia, South Sandwich Islands, British Overseas Territory
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Cumulus dotting the sky over Town Beach, Old Saybrook, Connecticut, US
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Distrail over Mt. Rainier, Washington, US
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An exquisite view of cumulus with the backdrop of a blue sky, spotted over Momochi Seaside Park, Fukuoka City, Japan
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Crepuscular rays over Canberra, Australia
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A primary rainbow along with a subtle secondary rainbow over Atagohama Central Park, Fukuoka City, Japan
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Cumulus over Khomeynishahr City, Esfahan, Iran
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Altocumulus lenticularis duplicatus spotted over the mountains, from the Missouri River near Wolf Creek, Montana, US
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Iridescence yielding multiple colours over Brighton, Colorado, US
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A plethora of altocumulus lenticularis near Gulfoss, Iceland
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Circumzenithal Arc spotted over Brighton, Colorado, US
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Altocumulus lenticularis duplicatus accompanied by Mt. Rainier in a majestic pairing near Seattle, Washington, US
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22-degree halo over Cotia, São Paulo, Brazil
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