Abstract: The radar and surface structure of a severe thunderstorm's wake vortex on 25 June 1969 are examined. Two probable aerodynamic causes for wake vortex formation are Kármá vortices and starting vortices to the updraft lee. ...

Abstract: An organized persistent severe thunderstorm on 25 June 1969 blends elements of the classic supercell (Browning and Donaldson, 1963) and the multi-cell storm (Marwitz, 1972), as revealed by detailed surface and radar data. ...

Abstract: Recently, a rare radar artifact called the ?flare echo? or ?three-body scatter signature? has been examined by several researchers. Here, this midlevel storm signature is called the ?three-body scatter spike? (TBSS) and ...

Abstract: Severe thunderstorm evolution is synthesized, using published and unpublished studies of radar, instrumented aircraft, visual and surface observations. These observations reveal the existence of a downdraft (originating ...

Abstract: Single-Doppler Velocity data reveal that a dominant feature in the Union City, Okla., tornadic thunderstorm is a core mesocyclonic circulation, 2?6 km in diameter, extending to at least 9 km above ground. There is an ...

Abstract: Doppler radar measurements in the Union City, Okla., tornadic storm of 24 May 1973 led to discovery of a unique tornadic vortex signature (TVS) in the field of mean Doppler velocity data. The distinct character of this ...

Abstract: Some results of the first 10 cm dual-Doppler radar measurements in a tornadic storm are presented. A mesoscale, cyclonic circulation confirms proposed single Doppler vortex signature and indicates that the curved reflectivity ...

Abstract: Changes in tornado structure were accompanied by corresponding changes in damage intensity and debris configuration. Initially, damage was light over a 200 m wide path but the vortical nature of the winch was clearly ...