A shelf cloud is a low, horizontal wedge-shaped
arcus cloud, associated with a
thunderstorm gust front (or occasionally with a
cold front, even in the absence of thunderstorms). Unlike a
roll cloud, a shelf cloud is attached to the base of the parent
cloud above it (usually a thunderstorm). Rising cloud motion often can be seen in the leading (outer) part of the shelf cloud, while the underside often appears turbulent, boiling or fried, and wind-torn cloud.
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A low, horizontal wedge-shaped
arcus cloud , associated with a thunderstorm
gust front (or occasionally with a cold front, even in the absence of thunderstorms). Unlike the
roll cloud , the shelf cloud is attached to the base of the parent cloud above it (usually a thunderstorm). Rising cloud motion often can be seen in the leading (outer) part of the shelf cloud, while the underside often appears turbulent, boiling, and wind-torn.
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