Analysis of the Development of the Intense Warm-Core Mesovortex Associated with the 8 May 2009 Central United States "Super Derecho" Event
In this presentation, we utilize the aforementioned WRF-ARW simulation output to more completely describe the formation of the intense warm-core line-end vortex. Quasi-Lagrangian back trajectory analyses are used to assess how vertical vorticity found in association with convective elements along and ahead of the DCS is generated. In so doing, the contributions of buoyantly-generated and environmental horizontal vorticity to this process, both streamwise and crosswise in nature, are discussed. Correlation coefficients between the vertical vorticity and updraft fields are computed to establish the supercell-like nature of the convective cell at the northern extent of the DCS. Selected budget analyses are presented to elucidate the possible role of vortex merger in the formation of the warm-core line-end vortex. Comparisons will be drawn between the process(es) of vortex formation identified herein and those associated with other convective phenomena on the meso-gamma to the synoptic-scale.