 The Derichose is a widespread, long-lived, straight-line windstorm that is associated with a land-based, fast-moving group of severe thunderstorms. Derichose can cause hurricane-force winds, tornadoes, heavy rains and flash floods. Convection-induced winds take on a bow-echo-backward sea form of squall line, forming in an area of wind divergence in upper levels of the troposphere, within a region of low-level warm air abaction and reach low-level moisture. They travel quickly in the direction of movement of their associated storms, similar to an outflow boundary gust front except that the wind is sustained and increases in strength behind the front, generally exceeding hurricane force. A warm-weathered phenomenon, Derichose occur mostly in summer, especially during June, July and August in the northern hemisphere, within areas of moderately strong instability and moderately strong vertical wind shear. They may occur at any time of the year and occur as frequently at night as during the day-like hours. Derichose comes from the Spanish word in adjective form for straight-to-war direct in contrast with the tornado which is a twisted wind. The word was first used in the American meteorological journal. In 1888 by Gustavus it left Hendricks in a paper describing the phenomenon, and based on a significant Derichose event that crossed Hyderabad on July 31, 1877.