Gust fronts - before: Stock photos of gust fronts (shelf clouds or Arcus accessory clouds) as they appear on the forward edge, ahead of the cooler air and precipitation with a severe storm cloud complex.

  • An approaching desert storm with strong winds and blowing dust
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  • An Arcus cloud with laminar appearance precedes a squall line
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  • Multi-tiered Arcus shelf cloud with a wavy forward edge
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  • A deep, sculpted Arcus cloud precedes a squall line in a stormy sky
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  • This Arcus cloud has a deep stack of layers
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  • Battle zone in the sky: squall line structure
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  • A squall line storm is coming in fast, heralded by a thin Arcus cloud
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  • Rain pushes forward behind a thin, relatively high-based shelf cloud
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  • This shelf cloud (Arcus) has three layers sandwiched together
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  • This common example of a gust front has a shallow shelf cloud
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  • A shelf cloud falling apart as outflow modifies and loses momentum
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  • Storm clouds coming: a well organized advancing supercell
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  • Gust front divides cold from warm air under a storm
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  • A low threatening dark cloud in a stormy sky
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  • A detached line of clouds along a weak gust front
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  • A flanking line doubles as a gust front during an outflow phase
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  • Renewed outflow on a storm makes for rapid formation of scud clouds
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  • A sharp, wedge-shaped lower lip of a shelf cloud as seen head-on
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  • The layers of a shelf cloud step downward as gust front approaches
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  • Close view of the bottom of a shelf cloud with scud teeth
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