Scientists unravel the twisted ways of tornadoes.
Tornado Simulations prepared by NCSA's Atmosphere and Oceanic Science group for the IMAX movie Stormchasers. Tornadoes are also irresistible, it seems. The basic atmospheric physics that gives rise to tornadoes is well understood by now. Thunderstorms usually contain updrafts, large rising swells of warm, moist air. Supercomputer simulations depict this process quite dramatically.