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Undulatus amidst a myriad of clouds over La Alpujarra, Andalusia, Spain
Altocumulus with some signs of lenticularis formations, spotted over El Paso, Texas, US
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", spotted in the morning over Banqiao District, New Taipei City, Taiwan
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Altocumulus intercepted by contrails over Zhongshan District, Taipei City, Taiwan
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Undulatus that shows signs of lenticularis, spotted by Jeremy's daughter-in-law over West Sussex, England
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Lenticularis over Mahajeran, Northwest Iran
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Signs of asperitas developing as a storm front was moving into the area near Santa Cruz, California, US
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A view of undulatus towards the west of Wellingborough, England
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Following a storm, mid-to-upper level winds brought about undulatus above El Dorado Hills, California, US
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Undulatus over Taipei, Taiwan
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Undulatus as seen from 34,000 feet while in flight over western Nevada, US
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Altocumulus undulatus shortly before sunset, spotted over Browns Bay, Auckland, New Zealand
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Undulatus over Melbourne, Australia
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Undulatus over Principe Real, Portugal
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Altocumulus lenticularis spotted on a drive home after skiing in Mammoth Lakes, California, US
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Undulatus over National Taipei University, Taipei, Taiwan
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