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Other Clouds
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Optical Effects
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An arcus ushering in a storm system over Somerset, England
A roll cloud, or volutus, which is a rare, low horizontal tube-shaped arcus cloud, detached from the parent storm cloud, and represents the leading edge of a thunderstorm's gust front. This example was spotted between Vinylhaven Island and the Rockland area of the Mid-Coast, near Penobscot Bay, Maine, US.
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A well-defined arcus marks the leading edge of this storm system, which is accompanied by asperitas and signs of lacunosus, near Fort Wayne, Indiana, US
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A storm system near Savannah, Georgia, US
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An approaching storm system near Brighton, Colorado, US
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A developing and expansive storm approaching Marina di Pisciotta, Italy
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An imposing storm which Lisa spotted from her boat, near Åland Islands, Finland
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The development of what appears to be an arcus, also known as a shelf cloud, marking the leading edge of a storm system near Lam Plai Mat, Thailand
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The leading edge of a storm system near Paynesville, Minnesota, US
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A storm system with a leading arcus, otherwise known as a shelf cloud, near Brighton, Colorado, US
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A storm system near Rogerstown Estuary, Dublin, Ireland
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A storm system moving over farmland near Randolph, Iowa, US
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Arcus, also known as a shelf cloud, ushering in a storm near Montevideo, Uruguay
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An arcus formation within a dissipating storm system near Campbelltown, Central Victoria, Australia
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Arcus, also known as a shelf cloud, marks the leading edge of a storm system near The Entrance North, New South Wales, Australia
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A storm system with a well-developed arcus, also known as a shelf cloud, near Cotia, Sao Paolo, Brazil
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