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Other Clouds
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Optical Effects
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Arcus delineating the leading edge of a storm system as it moves over Columbia, Missouri, US
An arcus, also known as a shelf cloud, marks the leading edge of a thunderstorm's gust front, spotted here with a storm system that generated a tornado warning near Omaha, Nebraska, US
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An approaching storm system over Micco, Florida, US
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A storm system associated with a cold front spotted over Southern Alberta, Canada
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An arcus cloud, also known as a shelf cloud, ushering in a storm system near Swansea, Tasmania, Australia
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A robust, developing storm system spotted over Turks and Caicos Islands
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Cumulonimbus with an arcus outlining the leading edge of the storm, accompanied by pannus, spotted by John's friend, Will Werner, in Brazil
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An arcus ushering in a storm, spotted looking east over the Tasman Sea, near Balgowlah Heights, New South Wales, Australia
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A leading edge of a storm system near Antwerp, Belgium
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Following a humid day, a notable storm developed over the Tasman Sea, near Manly, New South Wales, Australia
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Signs of what appears to be a variation of an approaching arcus, ushering in inclement weather, spotted near Aberdyfi, Wales
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An arcus, also known as a shelf cloud, indicating a leading edge of a storm system, spotted near Malebelling, Western Australia, Australia
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Signs of lacunosus on the underside of the leading edge of a cumulonimbus, spotted over Erm, The Netherlands
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Signs of a dissipating arcus associated with a diminishing storm system near Bremen, Germany
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A storm system moving northeast near Manchester, Connecticut, US
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An arcus ushering in a storm system over Somerset, England
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