Abstract: Using MICAPS3.1 chart of Ouyang Wen and V-3θ structural analysis method and conventional meteorological data,in June 2016,10-12th in northwestern Liaoning, local stronger rainfall, high winds, hail weather process were analysed. The results showed that,①the local heavy rainfall in northwestern Liaoning and the high winds, hail were generated in the context of the Northeast cold vortex.②And it was difficult to forecast local rainstorm through general weather learn angle,while V-3θ structure analysis method could make up the shortage in a certain extent. In short time storm occurred before 12~24 hours,Liaoning northwest area upstream and the Jinzhou V-3θ figure existsed ultra-low temperature,the whole layer flow in the roll flow,θ,Θ_sed and θ* curve more at left-leaning,unstable energy gathered,more near distance between Θ_sed and θ*,better humidity conditions features,which had better of indicates role on Liaoning northwest area to local rainstorm of forecast.③Strong cold advection would not only make the ground temperature-pressure strengthening increased,surface pressure gradients increased,but also promote the development of surface wind fields,resulting in high winds,and low level cold advection was a major cause of 7~8 class winds in northwestern Liaoning.

Key words: northeast cold vortex, V-3θ, structure analysis, cold advection, strong convective weather