Abstract:For understanding the influence of dry intrusion on the precipitation of northeast cold vortex, a typical cold vortex over northeastern China on July 2011 was simulated by WRF model. The results show that: Dry intrusion has affected the cold vortex precipitation in two aspects. On the one hand, the dense air from upper level lifts the warm moist air ahead of dry intrusion, and as a consequence, it promotes the cold vortex precipitation; On the other hand, the forward moving of the descending cold air makes its front interface more steep and the atmospheric stratification instable, which helps to promote the vertical development of rain clouds. The cold voltex precipitation mainly concentrates below the central section of the rain clouds.