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Optical Effects
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Flying above the clouds over St. Marks Wildlife Refuge, Florida, US
An expansive display of altocumulus over Santa Rosa, California, US
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Altocumulus stratiformis radiatus, often seen as a precursor to changing weather patterns, spotted over Hitchin, Hertfordshire, England
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Fallstreak Hole (Cavum) spotted over Gaw Hill, Ormskirk, West Lancashire, England
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Altocumulus stratiformis with signs of a fallstreak hole (cavum), spotted over St. Paul, Minnesota, US
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Altocumulus with signs of lenticularis near the horizon, spotted over Doolandella, Queensland, Australia
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Altocumulus over Khomeynishahr City, Esfahan, Iran
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A plethora of altocumulus over Iligan City, Philippines
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A snow-like landscape in the sky over Somerset, England
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Summer sunset over Rumwell, Somerset, England
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A classic fallstreak hole (cavum) over Blyth South Beach, England
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A bouquet of altocumulus spotted by Anuja's friend, Tanya Sinha, from an altitude of 2,900 metres in the Himalayas, near Kareri, Himachal Pradesh, India
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A mixed sky over Tainan, Taiwan
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", spotted over Proserpine, Queensland, Australia
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Altocumulus stratiformis spotted over São Paulo City, Brazil
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Cirrocumulus stratiformis over Curtin, Canberra, Australia
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