Abstract:Based on analysis on the thunderstorms in the past decade during winter half year occured in Jiangsu, we filtered 12 elevated thunder storms, revealed the temporal and spatial distribution characteristics, generalize typical circulation situation of elevated thunder storms occured in Jiangsu. We found that unstable shallow layer and strong wind shear provide weak thermal instability and strong dynamical instability condition. Strong wind shear, frontal secondary circulation caused by frontolysis at 850 hPa, the positive vorticity advection increase with height in front of the upper trough, and the upper divergence and lower convergence pumping provide dynamical uplift condition above the top of the inversion layer. On higher elevation angle echo present annular shape which is like to Zero band bright band. Convective monomer appeared constantly arround circle. We summarized forecast Points of elevated thunder storms occured in Jiangsu:Two high troughs move eastward successively, the speed of southwest jet is greater than 16 m·s-1 on 700 hPa, east to west shear line on 850 hPa,there exist a strong inversion layer with the top higher than 1.5 km and the inversion intensity stronger than 5℃. 0-6 km wind shear is stronger than 18 m·s-1, temperature contrast of 700 hPa and 500 hPa is bigger than 15℃ and relative humidity of 700 hPa is higher than 80%,specific humidity of 700 hPa is almost 5~6 g·kg-1.