Abstract: The convective stratiform cloud is one of the main types of precipitation cloud in China, and its dynamic and thermal characteristics are more complicated than that of the single stratiform cloud or convective cloud. Based on the NCEP reanalysis data with 1°×1° spatial resolution, a typical convective stratiform cloud process in the Northeast China was simulated using the WRF model. The results show that this process belongs to a potential instability type  according to an analysis of the stability. The convective available potential energy (CAPE) is not large at the initial phase in the formation of the convective stratiform cloud, and θse decreases with the height increase, which is favorable to the development of the convection. The change of water vapor convergence at the lower levels and divergence  at the upper levels plays a dominant role when the convective cloud embeds the stratiform cloud. The thermal effect creates the conditions for this process and the dynamic factor plays a main role.

Key words: Convective stratiform cloud, WRF model, Potential instability, Convective available potential energy (CAPE)