Based on Tianshui Doppler radar data, characteristics of radar reflectivity, Doppler velocity and PUP products during a warm area rainstorm in Southeastern Gansu Province in 19-20 June 2013 are analyzed. The results show that the characteristics of radar reflectivity are extremely similar with the characteristic of warmarea torrential rains in eastern and southern China. The “train effect” of local strong echo is obvious. Strong echoes are generally lower than 45 dBz, and mainly distribute in below 0℃ layer. It was advantageous to the generation of strong echo and highfrequency “train effect” that warm advection and wind convergence structure in boundary layer to middlelower level, lowlevel jet maintaining showed on Doppler velocity characteristics. The mesoγ scale vortex has indicative significance for the nowcasting of severe precipitation.