Abstract:By using the conventional meteorological observations, data of automatic ground stations, NCEP 1°×1°reanalysis data, wind profile radar data, satellite and Doppler radar data, an extreme short-range heavy precipitation process in Yichang of Hubei Province at night of July 7, 2016 was analyzed from large-scale circulation background, meso-scale characteristics and topography. According to the results, the heavy precipitation in local areas is generated from the southwest warm and moist airflow at the edge of the subtropical anticyclone, showing the characteristics of strong meso-scale dynamic uplift in the middle-lower layer, high precipitation efficiency, and obvious topographic effect. The intensive ascending motion caused by the interaction of meso-scale vortex and strong vertical wind shear on the ground at the entrance of the canyon provides sufficient dynamic conditions. The weak guiding airflow and the blocking effect of mountains prolong the duration of precipitation in local areas. The two conditions jointly lead to this extreme short-range heavy precipitation. Furthermore, the low centroid structure of the echo improves the precipitation efficiency, and the backward propagation of the MCS also increases the cumulative precipitation in local areas.