Abstract:Under the influence of the MCS,peculiar hail weather process occurred in the east of Anhui province from the night of June 14 to the dawn of June 15 of 2005.This issue analyzes the circumfluent field and weather impact system with the data such as surface observations,upper-air observations,satellite imagery,Doppler radar.We calculate the correlative parameters of strong convection weather and analyze the energy parameters in detail,intending to reveal the characters of the weather system and the physical characters of the convection parameters.The result of our study indicates that firstly this large area wind-hail strong convection weather system was aroused by one MCS,controlled by the northeast low vorticity,under the advantageous background of upper-air pitch trough along with surface convergence line.Secondly KI,SI indexes have some limitation to forecast this strong wind-hail process.Besides,CAPE,NCAPE,SSI and SRH parameters can reflect the appearance of the strong wind-hail process well.