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[[File:Line echo wave pattern.gif|thumb|left|Radar schematic of a LEWP]]
[[File:Illinois-LEWP.jpg|thumb|right|A
A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which an area of thunderstorms forms a [[Mesoscale meteorology|mesoscale]] [[low-pressure area]] with a rotating "head" and, typically, a [[bow echo]] to its south (or equatorward).<ref>{{cite book |last = Glickman |first = Todd S. (ed.) |authorlink=Todd Glickman |title = Glossary of Meteorology |publisher = American Meteorological Society |edition = 2nd |year = 2000 |___location = |pages = |url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern |doi = |isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web | url=http://www.crh.noaa.gov/iwx/?n=severestorms_2011apr19 Severe Storms of April 19th-20th | title=Severe Thunderstorms and Tornadoes of April 19-20, 2011 | publisher=National Weather Service Weather Forecast Office, Northern Indiana | date=April 24, 2011 | accessdate=July 28, 2012 | author=Obergfell; Lashley; Chamberlain}}</ref> and often produce tornadoes, some of which can be strong.<ref>{{cite web | url=http://www.wrh.noaa.gov/mtr/stormSummary/TorWx_3_18-23_2011/torwx_3_18-23.php | title=Waterspouts and Tornadoes March 2011 | publisher=National Weather Service Forecast Office (part of NOAA) | date=2011 | accessdate=July 28, 2012}}</ref>
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== See also ==
* [[Convective storm detection]]
* [[Mesoscale convective system]] (MCS) and [[mesoscale convective complex]] (MCC)
* [[Mesoscale convective vortex]] (MCV) and [[mesolow]]
* [[Rear-inflow jet]] (RIJ)
==References==
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[[Category:Radar meteorology]]
[[Category:Severe weather and convection]]
[[fr:Grain en arc#Arcs multiples]]
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