新余市一次暴雨过程分析
Analysis of a Rainstorm Process in Xinyu

利用地面高空观测资料，结合ERA5再分析资料和多普勒雷达、乡镇自动站雨量等，对2023年4月18日新余市一次暴雨天气过程进行分析，结果表明：此次暴雨过程发生在高空槽东移，切变线南压的形势下，夜间低层西南急流加强输送了水汽和能量条件，低层暖湿特征显著，大气处于对流不稳定状态，降水的可预报性较高。大暴雨雨带位主要于宜春中部，新余处于大暴雨带的南面，且位于切变线南侧、700 hPa急流出口区的左侧、850 hPa和925 hPa急流轴上，产生了较强的上升运动条件，有利于强降水的出现。
Based on the surface observation data at high altitude, combined with ERA5 reanalysis data, Doppler radar, township automatic station rainfall, etc., a rainstorm weather process in Xinyu on April 18, 2023 is analyzed. The results show that the rainstorm process occurred in the shape of the high trough moving eastward and the shear line pressing southward. The low-level southwest jet at night strengthened the transport of water vapor and energy conditions. The low-level warm and humid characteristics are significant, the atmosphere is in a convective unstable state, and the precipitation is highly predictable. The heavy rainstorm belt is mainly located in the middle of Yichun, and Xinyu is located in the south of the heavy rainstorm belt, and on the south side of the shear line, the left side of the 700 hPa jet exit area, and on the 850 hPa and 925 hPa jet axes, resulting in strong upward movement conditions, which is conducive to the emergence of heavy rainfall.