Abstract: Based on the data from the automatic weather station and Doppler radar, the local severe convective weather caused by a gust front in the southern part of the basin is analyzed.It is shown that the gust front is a severe weather phenomenon caused by the strong divergence of the downdraft generated by the convective storm when it reaches the ground and the intersection of the warm and humid air at the lower level.The gust front is a narrow arc on the Doppler radar, the echo intensity is weak, the velocity map has convergence, the gust front and the strong thunderstorm have the promotion effect, the development and the maintenance.The crossing of gust front will cause the abrupt change of meteorological elements. There is a good correspondence between the location of the strong thunderstorm and the position of the convergence line of the ground wind field and the location of the temperature slot line, and it has a strong directive significance for the early release of the short and impending prediction and early warning.