Abstract: Based on the Doppler radar data from Shenyang and Yingkou and surface and upper meteorological data from automatic weather stations, a supercell storm process on July 14, 2011 in Shenyang was analyzed in order to forecast accurately the short-time heavy rain caused by a supercell storm. The results show that the formation of ground convergence line and shear line are about  2 hours ahead of  that of precipitation, and both locations are consistent with the storm location. The heavy convective storm is of feature of supercell storm, and it appears bow echo. An inflow gap with a “V” shape appears on the speed chart, so is a mesocyclone in the corresponding speed field. The maximum basic reflectivity rate in Yinkou reaches 61 dBz, and there are weak echo area and echo overhang on the vertical profile of reflectivity factor. The severe convective weather disaster warning about short-term rain and thunderstorms can be  issued when the mescocyclone is found in the radar echo and the cyclone could maintain about 1 hour or it appears the bow echo, and radar base reflectivity intensity in Shenyang is more than 45dBz.

Key words: Supercell strom, Mesocyclone, Bow echo, Short-time heavy rain, Vertical wind shear, Echo overhang