Based on analysis on the characteristics of thunderstorms in the past decade from 2007 to2016 during winter half year in Jiangsu,twelve typical elevated thunderstorm processes were screened to reveal the temporal and spatial distribution characteristics and the typical circulation situation of elevated thunder storms occurred in Jiangsu. We found that unstable shallow layer on the top of the inversion layer and strong vertical wind shear provided weak thermal instability and strong dynamical instability con...