Numerical simulation of a convective storm generating a tornado

TORRES BRIZUELA, MARCELA; NICOLINI, MATILDE

Foz do Iguaçu, Brazil

Conferencia; 8th International Conference on Southern Hemisphere Meteorology and Oceanography; 2006

A numerical simulation of a thunderstorm generating a tornado F2 (Fujita scale), developed during the afternoon of 28 April 2001 over the area of Resistencia (27°27’ S, 59°03’ W) in Argentina, is performed using a nonhydrostatic mesoscale model in order to investigate this severe event. This investigation is mainly directed to test if the slight cyclonic curvature in the enviromental wind-shear is the responsible in the tornadogenesis stage. It is found that even if the curvature of the environmental wind hodograph has a slight cyclonic curvature, it was responsible for the tornadogenesis in the supercell storm that developed.