bow echo
n.— «The line of thunderstorms had developed into what is known as a bow echo, named because the line of storms surges or “bows” out to the east and northeast due to strong winds associated with the storms.» —“NWS Classifies Wylie Tornado as EF-1″ KDFW-TV (Dallas/Fort Worth, Texas) Apr. 1, 2007. (source: Double-Tongued Dictionary)