【摘要】 高时空分辨率的风廓线雷达资料在短时降水的临近预报预警中具有重要价值。基于常规气象观测、区域站资料、美国国家环境预报中心（National Center for Environmental Prediction,NCEP）再分析资料及风廓线雷达组网数据，对2023年山东入汛以来首场大范围暴雨过程进行分析，结果表明，此次过程受高空槽、低涡、低空急流及中尺度切变线共同影响，6月27日为暖区对流，28日以低涡引发的短时强降水为主；强降水主要位于中尺度切变线右侧的正涡度平流区及辐合中心上空，低层辐合与高层辐散的垂直配置为强对流发生提供动力条件；1 km以下超低空风场变化对强降水具有指示意义，低空急流下探及水平风脉动与降水强度呈一定正相关；强降水前1.0 h内低空急流指数与垂直风切变明显增强，降水结束前风切变迅速减弱，近地层出现强切变，风廓线雷达在识别短时强降水临近特征方面具有明显优势。更多还原

【Abstract】 High spatiotemporal resolution wind profile radar data are of significant value in the nowcasting and early warning of shortduration heavy precipitation. Based on conventional meteorological observations, regional automatic station data, reanalysis data from the National Centers for Environmental Prediction(NCEP), and wind profile radar network observations, this study analyzes the first large-scale heavy rainstorm event in Shandong Province following the onset of the 2023 flood season. The results indicate that, this event was jointly influenced by an upper-level trough, a low vortex, a low-level jet(LLJ), and a mesoscale shear line. Convection on June 27 occurred in the warm sector, while short-duration heavy rainfall on June 28 was primarily induced by the low vortex. The heavy precipitation mainly occurred on the right side of the mesoscale shear line, within regions of positive vorticity advection and above con-vergence centers. The vertical configuration of low-level convergence and upper-level divergence provided favorable dynamic condi-tions for strong convection. Variations in the near-surface wind field below 1 km were indicative of heavy rainfall. The downward exten-sion of the LLJ and enhanced horizontal wind perturbations were positively correlated with precipitation intensity. Within 1 hour prior to the onset of heavy rainfall, both the LLJ index and vertical wind shear increased significantly. Before the cessation of rainfall, vertical wind shear weakened rapidly, and strong low-level shear appeared near the surface. Wind profile radar showed clear advantages in iden-tifying precursor signatures for nowcasting short-duration heavy rainfall events.更多还原