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because the ingredients are usually enhanced by shortwaves because these are stronger than the mean environment and weather systems around them.
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and positive shear vorticity, respectively. Ahead of a shortwave there is large-scale lift due to divergence from
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to the synoptic scale. Shortwaves are most frequently caused by either a cold pool or an upper level
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Shortwave troughs are a cause of lift, or forcing, which is required for the development of
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pattern. Its length scale is much smaller than that of and is embedded within
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Shortwaves are often associated with warm air advection (WAA) or cold air
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