15
Tornadogenesis and Tornadogenesis Failure in Simulated Supercells

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Monday, 3 November 2014
Capitol Ballroom AB (Madison Concourse Hotel)
Jason Naylor, Purdue University, West Lafayette, IN; and M. S. Gilmore
Manuscript (1.6 MB)

A three-dimensional idealized cloud model was used to study the storm-scale differences between simulated supercells that produce tornado-like vortices and those that do not. Each simulation was initialized with a different Rapid Update Cycle, version 2 (RUC-2), sounding that was associated with tornadic and nontornadic supercells in nature. The focus is an analysis of vorticity along backward-integrated trajectories leading up to tornadogenesis (19 simulations) and tornadogenesis failure (14 simulations). Differences in low-level thermodynamic structure were also explored. Preliminary results from sensitivity tests involving different microphysics parameterizations and the inclusion of surface drag will also be presented.