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Other Clouds
- Arcus
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- 'Supercilium' (not official classification)
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- Volutus (Roll cloud)
Optical Effects
- 22° Halo
- 46° Halo
- Circumhorizon Arc
- Circumscribed halo
- Circumzenithal Arc
- Cloudbow / Fogbow
- Corona
- Crepuscular rays & shadows
- Diffuse arcs
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- Infralateral arc
- Iridescence
- Lower Sun Pillar
- Lower Tangent Arc
- 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 sky filled with cirrocumulus and an array of colours brought forth by iridescence, spotted over Mirabelles-aux-Baronnies, Drome, France
A shadow of a contrail spotted over Erm, The Netherlands
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Iridescence spotted over the Mystic River, Medford, Massachusetts, US
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Reflections of the sky over the Little Missouri River, near Elkhorn Ranch, North Dakota, US
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Iridescence and undulatus spotted over Canutillo, Texas, US
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Full moon illuminating altocumulus a couple of hours after sunset, spotted over Madison, Wisconsin, US
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A sky filled with patterns and colours over Mengelrode, Germany
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Altocumulus perlucidus spotted over Angle Lake near Seattle, Washington, US
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Iridescence amidst the cumulus clouds over Rome, Italy
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Undulatus in various forms, reminding Holly of an apt quote by Keith Wynn; 'I love that no two cloud formations, since time began, have ever been the same. Each moment in time has created its own unique fingerprint.' This unique representation was spotted over Longmont, Colorado, US.
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A vivid 22-degree halo spotted around mid-day over Singapore
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Iridescence by way of a layer of cirrostratus, with nearby cirrocumulus undulatus, spotted over Sumirago, Varese, Italy
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Lunar iridescence within a layer of altocumulus, spotted from the hills overlooking the sea and the Principality of Monaco
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Iridescence amidst an opening in the sky over Winchester, England
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Altocumulus perlucidus over Laguna Beach, California, US
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Iridescence over Popayán, Colombia
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