‘Derechos are typically associated with a long lived bow echo or a series of bow echoes.’ ‘Several reports of downed trees and power lines near Altha, and structural damage at Blountstown, Florida were received as the bow echo tracked across Calhoun County.’ A bow echo is a special term used for describing the shape of a line of thunderstorms on the Doppler radar. It describes the characteristic radar return of a large complex of thunderstorms known as a mesoscale convective system that is shaped like an archers bow. Along that line, some upper-level winds are stronger than others. What exactly is a bow echo?-The term was coined in the late 1970s by Dr. Fujita.-It’s formed within an ongoing squall line. A bow echo is the characteristic radar return from a mesoscale convective system that is shaped like an archer’s bow. Bow echoes are relatively small (20-120 km [10-65 nm] long), bow-shaped systems of convective cells that are noted for producing long swaths of damaging surface winds. A "bow echo" or "bowing line segment" is an arched/bowed out line of thunderstorms, sometimes embedded within a squall line. Damaging straight-line winds often occur near the "crest" or center of a bow echo. Such storms often last around two to five hours Bow Echo: A bow echo is the characteristic radar return produced by a thunderstorm’s downdraft that is shaped like an archer’s bow. Typically, a derecho forms from a cluster of thunderstorms that organize into a bow shaped complex known as a bow echo. Bow echoes are severe thunderstorms which carry straight line winds and are capable of creating extensive damage around the area affected. Radar image of a bow echo crossing Kansas City at 2:14 AM on 2 May 2008 (NWS Kansas City). Bow Echoes. According to the National Weather Service a bow echo … bow echo A bow-shaped line of convective cells that is often associated with swaths of damaging straight-line winds and small tornadoes . The line may eventually morph itself into a "bow - like" shape. These systems can produce severe straight-line winds, occasional tornadoes and cause major damage. The term "bow echo" was first used right around 1978. Bow echo Last updated October 02, 2020. Bow echo is a term for mesoscale convective system which is shaped like an archer's bow when shown on radar. One of the more significant and intriguing forms of severe weather is the bow echo. When the storms … The term “bow echo” was first used by Dr. Theodore Fujita in a May 1978 paper. All these terms fall under the more generic term Quasi-Linear Convective System (QLCS). A bow echo is a term describing the characteristic radar return from a mesoscale convective system that is shaped like an archer’s bow.These systems can produce severe straight-line winds and occasionally tornadoes, causing major damage.They can also become derechos. This term was first created by the founder of the Fujita Scale - Dr. Theodore Fujita. 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