Dual-Doppler radar and cloud photogrammetry analysis of the 5 June 2009 Goshen County, Wyoming tornado during VORTEX2
This study presents results of the synthesis of the dual-Doppler and cloud photogrammetry data sets for the 5 June 2009 Goshen County, Wyoming tornado so as to better understand the relationship between the visual characteristics of the supercell hook region and funnel with the dual-Doppler radar data. For example, results will be shown where the temporal evolution of the funnel diameter is compared to the maximum vertical vorticity and circulation derived from the dual-Doppler radar data. It will also be shown that the radius of maximum wind (RMW) is relatively constant with height and is much larger than the funnel diameter near the ground. Near cloud base, however, the RMW is located near the tornado funnel. Analysis of angular momentum suggests that a tornado cyclone scale circulation was not present within this storm. Finally, during the time of tornadogenesis, cyclonic and anticyclonic lowered cloud bases were observed. Vortex line analysis suggests that these counter rotating circulations were, in part, created by the baroclinic generation of vorticity.