Steamwise Vorticity in a Supercell Thunderstorm Simulation

This animation, created from the dataset of a simulated hypothetical thunderstorm, compares vortex (gold) with wind velocity (grey to red by speed). The scene illustrates rotation in the updraft, the hallmark characteristic of a supercell.
credit : Greg Foss and Greg Abram, TACC, University of Texas at Austin, Brittany Dahl and Amy McGovern, University of Oklahoma