Sunday, 22 January 2012
Upscaling Effects of Supercell Thunderstorms: Joplin and Tuscaloosa Case Studies
Hall E (New Orleans Convention Center )
An ongoing analysis of the Spring 2011 tornado outbreaks in Missouri and Alabama may provide evidence for significant upscaling in the wake of strong supercell thunderstorms – with the most significant effects associated with the strongest of storms. Upscaling refers to the alteration of certain atmospheric fields on a larger scale than the supercell itself. Radar and satellite imagery for each event provides information about supercell location and strength. NWP model analyses allow assessment of changes of atmospheric variables, as summarized through parameters like CAPE, SREH, and potential vorticity. It is crucial to understand supercell upscaling because of possible implications on prediction.