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a LEWP by definition MUST be a series of bow echos in a wave-shaped pattern. Any random cold front/low pressure area's squall line is not automatically a LEWP. |
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A LEWP is an extension of the concept of the bow echo, which usually indicates a powerful convective windstorm. Areas hit by the apices of bows often see the worst weather, with the highest winds and very heavy rain. However, if the sides of the bows reach enough of an orientation parallel to the derecho's movement, [[storm train|a very long-duration]] heavy rain event can result, leading to [[flash flood]]ing. A serial derecho can be in the form of a LEWP or a single, very large [[bow echo]].<ref>{{cite web | url=http://www.srh.noaa.gov/oun/?n=spotterglossary-figure4 | title=Line Echo Wave Pattern (LEWP) | publisher=National Weather Service Weather Forecast Office | work=Norman, OK: Figure 4, LEWP | date=December 2, 2009 | accessdate=July 28, 2012}}</ref>
== See also ==
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