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Optical Effects
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An expansive display of altocumulus over Mendip Hills, England
Sunset over Mendip Hills, England
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A distrail and a contrail both visible through cirrocumulus, spotted over Wells, Somerset, England
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Altocumulus stratiformis undulatus, also known as a "mackerel sky", at sunrise over Wells, Somerset, England
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Lacunosus, a rare, short-lived formation, is identified in terms of the gaps between cloud elements, rather than the clouds themselves. It is when a cloud layer is composed of more or less regular holes, around which fringes of cloud form, like a net or rough honeycomb. The holes of this variety are formed by sinking pockets of air, and the cloud fringes around them by air rising up between the pockets to replace them. Such sinking can occur when a layer of cooler air finds itself over a warmer one. Being more dense, the cooler air sinks down through the warmer air. This classic example was spotted on a cold morning over Priddy, Somerset, England.
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Remnants of what appears to be the dissipating leading edge of storms over Mendip Hills, England
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An active sky with a retreating cumulonimbus and abundant cumulus congestus near Priddy, Somerset, England
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There are some signs of asperitas and mamma (mammatus) within this overcast sky over Mendip Hills, Somerset, England
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Crepuscular rays emanating brightly from behind cumulus clouds over Mendip Hills, Somerset, England
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Lacunosus with some subtle signs of asperitas, which also resembles a fish in its overall shape, spotted over Mendip Hills, Somerset, England
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Cumulus congestus bringing forth precipitation in the valley, spotted over Priddy, Somerset, England
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Cumulonimbus with dynamic crepuscular rays illuminating the falling precipitation near Mendip Hills, Somerset, England
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Corona and iridescence over Wells, Somerset, England
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Fluctus (Kelvin-Helmholtz) over Mendip Hills, Somerset, England
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A mixed sky with a contrail making its mark, nearly perpendicular to a host of other contrails, accompanied by altocumulus in the distance and stratus fractus in the foreground. This view was observed near Wells, Somerset, England.
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An approaching storm near Wells, Somerset, England
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