Feature Analysis about the "6.15" Heavy Rain in Dexing

Using the sounding data,surface meteorological observations,WRF numerical model and IHR_LAPS data,potential conditions of environmental field and physical characteristics were analyzed during the heavy rain on June 15,2011.The results showed that:(1)Vortex shear line,the high-level cold temperature slots,and compositional with jet stream,developed the vertical circulation of the heavy rain area,produced the characteristics with upper level divergence and low level convergence,make precipitation strengthening.(2)Plentiful vapor leaded to the strong precipitation and heavy rain.(3)The high value of CAPE corresponding with the rainstorm center,the space-time evolvement of CAPE showed the space-time evolvement characteristics of the heavy rain.(4)The ground stable temperature front was useful for the development of the mesoscale convergence,as well as the heavy rain occurred.(5)Both the low-rise spiral degrees center and high value of CAPE were the areas where the heavy rain occurs.The high value of local spiral degrees compositional with numerous lays,it was significant for the heavy rain forecast.