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Based on the conventional weather data, Doppler radar data, wind profile radar data, and automatic weather station data，an analysis is made of two local convective events. The results suggest that the local torrential rain occurred on 13 July 2007 can be attributed to the uplifting of southeast streams at lower levels forced by mountains, and the local convection occurred on 10 July 2007 was triggered by an ABL convergence line. The evolvement of weather conditions can be identified by the wind profile data, and the ABL convergence line by radar echoes and automatic weather station data. Considering the topography in Beijing areas, in combination with the close radar monitoring, the forecasting and warning of local severe convective weather can be improved greatly.