[目的]研究2010年7月19日单站暴雨过程.[方法]利用MICAPS常规资料和多普勒雷达回波资料,采用天气动力学诊断方法,对2010年7月19日天津大港气象站的暴雨天气过程进行系统分析.[结果]从物理量诊断分析来看,西南涡、暖切变线提供的动力作用、副热带高压边缘暖湿气流和高低空急流的水汽输送以及大气层结的对流性不稳定,是2010年7月19日暴雨过程产生的主要原因.另外,降水区处在大的水汽通量辐合区内,降水前水汽通量散度有负值中心,有明显的水汽聚集,为此次暴雨提供了较好的水汽条件.[结论]该研究为当地暴雨天气的预报提供了理论依据.%[Objective] The aim was to study the rainstorm process in a single station on July 19, 2010. [Method] Based on MICAPS conventional data and Doppler radar data, the rainstorm process in Dagang station in Tianjin on July 19, 2010 was analyzed systematically by means of weather dynamic diagnosis analysis. [ Result] From physical vector diagnostic analysis, the dynamic effect provided by southwest vortex and warm shear line, water vapor transported by warm and wet flow at the edge of subtropical high and upper and lower jet and unstable convection of atmospheric stratification were the main causes of the formation of rainstorm process on July 19, 2010. In addition, rainfall area was located in the big convergence area of vapor flux, and there was a negative center of vapor flux divergence before rainfall, with obvious accumulation of water vapor, which provided better water vapor condition for this rainstorm. [ Conclusion] The study could provide theoretical foundation for the forecast of rainstorm in Tianjin.
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