Line echo wave pattern - Revision history

Meltdown627: correcting CS1 errors

2024-05-22T16:57:22Z

correcting CS1 errors

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	[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]		[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]

	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|~~last~~ = Glickman ~~\|first =~~ Todd S. ~~(ed.)~~ \|~~author~~-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp ~~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 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|editor=Glickman, Todd S. \|editor-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp \| title=Severe Thunderstorms and Tornadoes of April 19-20, 2011 \| publisher=National Weather Service Weather Forecast Office, Northern Indiana \| date=April 24, 2011 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].

	== Formation ==		== Formation ==

The Eloquent Peasant: Importing Wikidata short description: "Weather radar formation"

2023-09-25T02:26:52Z

Importing Wikidata short description: "Weather radar formation"

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			{{Short description\|Weather radar formation}}
	[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]		[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]

BrownHairedGirl: Filling in 1 references using Reflinks

2022-08-12T12:56:18Z

Filling in 1 references using Reflinks

← Previous revision		Revision as of 12:56, 12 August 2022
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	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

	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 \| access-date=July 28, 2012}}</ref> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>		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 \| access-date=July 28, 2012}}</ref> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>{{cite web\|url=http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|title=Line echo wave pattern - Glossary of Meteorology \|publisher=Glossary.ametsoc.org \|date=2012-01-26 \|accessdate=2022-08-12}}</ref>

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Michael Hardy at 01:32, 4 February 2021

2021-02-04T01:32:10Z

← Previous revision		Revision as of 01:32, 4 February 2021
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	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|last = Glickman \|first = Todd S. (ed.) \|author-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp 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 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|last = Glickman \|first = Todd S. (ed.) \|author-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp 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 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].


	== Formation ==		== Formation ==

Monkbot: Task 18 (cosmetic): eval 5 templates: del empty params (3×); hyphenate params (7×);

2020-12-15T19:21:44Z

Task 18 (cosmetic): eval 5 templates: del empty params (3×); hyphenate params (7×);

← Previous revision		Revision as of 19:21, 15 December 2020
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	[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]		[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]

	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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=https://www.weather.gov/iwx/20110419_lewp 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~~=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|last = Glickman \|first = Todd S. (ed.) \|author-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp 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 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].


	== Formation ==		== Formation ==
	A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| ~~accessdate~~=July 28, 2012 \| url-status=dead \| ~~archiveurl~~=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| ~~archivedate~~=April 4, 2014 }}</ref>		A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| access-date=July 28, 2012 \| url-status=dead \| archive-url=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archive-date=April 4, 2014 }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

	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> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>		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 \| access-date=July 28, 2012}}</ref> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>

	{{clear}}		{{clear}}

DeWriterMD: Broken link replacement from NOAA to https://www.weather.gov/iwx/20110419_lewp (mid-first paragraph)

2020-02-10T01:34:29Z

Broken link replacement from NOAA to https://www.weather.gov/iwx/20110419_lewp (mid-first paragraph)

← Previous revision		Revision as of 01:34, 10 February 2020
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	[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]		[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]

	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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~~ \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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=https://www.weather.gov/iwx/20110419_lewp 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=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].

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2019-09-24T05:18:36Z

Formation: Task 16: replaced (1×) / removed (0×) deprecated |dead-url= and |deadurl= with |url-status=;

← Previous revision		Revision as of 05:18, 24 September 2019
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	== Formation ==		== Formation ==
	A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| ~~deadurl~~=~~yes~~ \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 ~~\| df=~~ }}</ref>		A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| url-status=dead \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

72.237.79.129 at 15:00, 24 April 2019

2019-04-24T15:00:42Z

← Previous revision		Revision as of 15:00, 24 April 2019
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	== Formation ==		== Formation ==
	A LEWP, according to the ~~NWAS~~, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>		A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

Joshoctober16 at 19:20, 6 January 2019

2019-01-06T19:20:07Z

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	==References==		==References==
	{{reflist}}		{{reflist}}

			{{Cyclones}}

	[[Category:Radar meteorology]]		[[Category:Radar meteorology]]

Bryan C. W.: Article organization, further explanation - new section

2018-05-09T18:15:16Z

Article organization, further explanation - new section

← Previous revision		Revision as of 18:15, 9 May 2018
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	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].


			== Formation ==
	A LEWP, according to the NWAS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>		A LEWP, according to the NWAS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

	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>		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> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>

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← Previous revision		Revision as of 19:21, 15 December 2020
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	[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]		[[File:Line echo wave pattern.gif\|thumb\|right\|Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is [[tessellate]]d repeatedly in a linear fashion]]

	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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=https://www.weather.gov/iwx/20110419_lewp 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~~=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<ref>{{cite book \|last = Glickman \|first = Todd S. (ed.) \|author-link=Todd Glickman \|title = Glossary of Meteorology \|publisher = American Meteorological Society \|edition = 2nd \|year = 2000 \|url = http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern \|isbn = 978-1-878220-34-9 }}</ref> LEWP often are associated with a multiple-bow serial [[derecho]]<ref>{{cite web \| url=https://www.weather.gov/iwx/20110419_lewp 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 \| access-date=February 9, 2020 \|author1=Obergfell \|author2=Lashley \|author3=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 \| access-date=July 28, 2012}}</ref> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].


	== Formation ==		== Formation ==
	A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| ~~accessdate~~=July 28, 2012 \| url-status=dead \| ~~archiveurl~~=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| ~~archivedate~~=April 4, 2014 }}</ref>		A LEWP, according to the NWS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| access-date=July 28, 2012 \| url-status=dead \| archive-url=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archive-date=April 4, 2014 }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

	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> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>		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 \| access-date=July 28, 2012}}</ref> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>

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← Previous revision		Revision as of 18:15, 9 May 2018
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	A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].		A '''line echo wave pattern''' ('''LEWP''') is a [[weather radar]] formation in which a single line of thunderstorms presenting multiple [[bow echo]]es forms south (or equatorward) of a [[Mesoscale meteorology\|mesoscale]] [[low-pressure area]] with a rotating "head".<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 \|author1=Obergfell \|author2=Lashley \|author3=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> The existence of a LEWP on radar means that a serial [[derecho]] has developed or is likely to develop soon, much as a [[hook echo]] indicates the same for a [[tornado]].


			== Formation ==
	A LEWP, according to the NWAS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>		A LEWP, according to the NWAS, is defined as "a [[squall line]] that has developed into a wave-like pattern due to acceleration at one end of the line and deceleration along the portion immediately adjacent."<ref>{{cite web \| url=http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| title=Doppler Weather Radar Overview \| publisher=NWAS \| work=Echo Identification using NEXRAD: Line Echo Wave Pattern \| accessdate=July 28, 2012 \| deadurl=yes \| archiveurl=https://web.archive.org/web/20140404130516/http://www.nwas.org/committees/avnwinterwx/doppler_weather_radar_overview.htm \| archivedate=April 4, 2014 \| df= }}</ref>

	[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]		[[File:Illinois-LEWP.jpg\|thumb\|left\|A LEWP in Illinois/Indiana and Arkansas, associated with a [[Tornado outbreak sequence of April 19–24, 2011\|very large derecho]]]]

	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>		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> In theory, a LEWPs formation is dependent on varying environmental conditions in different regions of the respective LEWP. In many LEWPs, outflow induced winds behind the leading edge tend to influence this edge, appearing as a bulge in reflectivity on radar. Another conditional scenario is varying amounts of shear parallel and along the line.<ref>http://glossary.ametsoc.org/wiki/Line_echo_wave_pattern</ref>

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