Line echo wave pattern

Radar schematic of a LEWP. This shape is a single wave along the pattern, for real LEWPs this shape is tessellated 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 echoes forms south (or equatorward) of a mesoscale low-pressure area with a rotating "head".[1] LEWP often are associated with a multiple-bow serial derecho[2] and often produce tornadoes, some of which can be strong.[3] 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.

  1. ^ Glickman, Todd S., ed. (2000). Glossary of Meteorology (2nd ed.). American Meteorological Society. ISBN 978-1-878220-34-9.
  2. ^ Obergfell; Lashley; Chamberlain (April 24, 2011). "Severe Thunderstorms and Tornadoes of April 19-20, 2011". National Weather Service Weather Forecast Office, Northern Indiana. Retrieved February 9, 2020.
  3. ^ "Waterspouts and Tornadoes March 2011". National Weather Service Forecast Office (part of NOAA). 2011. Retrieved July 28, 2012.