Derecho
Videos
A derecho is a widespread, long-lived, straight-line wind storm that is associated with a fast-moving complex of severe thunderstorms referred to as a mesoscale convective system.
Composite radar image of the June 2012 North American derecho (a progressive derecho) as it moved from Indiana to Virginia
A typical multi-bow serial derecho
A typical progressive derecho
Damage to the Väike-Maarja Church in Estonia after the derecho hit on 8 August 2010
Bow echo
Videos
A bow echo is 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, c
Derecho
…a mesoscale convective system. Derechos cause hurricane-force winds, heavy rains, and flash floods. In many cases, convection-induced winds take on a bow echo (backward "C") form of squall line, often forming beneath an area of diverging upper tropospheric winds, and in a region of both rich low-level moisture…
Radar image of a bow echo crossing Kansas City at 2:14 AM on May 2, 2008 (NWS Kansas City)
A bow echo west of the Chicago area
Hailstone caught during the storm in Piracicaba, Brazil