2008年7月4-5日山东暴雨天气过程分析

文章利用常规气象资料、物理量场资料和大气监测自动站等资料，对2008年7月4～5日鲁东南、鲁西南～鲁中西部出现的暴雨、局部大暴雨的天气过程，从天气形势、影响系统、物理量场诊断分析等方面做了研究，通过分析：此次过程为典型的西风槽与副热带高压边缘西南暖湿气流交绥造成暴雨的天气形势，低空急流的建立、发展和维持，为暴雨区提供了强的水汽输送和能量积累；由于中、低层缺乏切变线等辐合系统，山东虽然水汽通道很好，但水汽辐合集中在局部地区，只造成局部的暴雨天气；各种能量指数对暴雨预报有一定的指导意义。

Analysis of the Rainstorm Weather Process in Shandong Province on July 4-5, 2008

By using the conventional meteorological data, the physical quantity field data and the data from the Atmospheric Automatic Monitoring Station, this paper researches into the process of rainstorm and local heavy rainstorm occurring in Southeast Shandong, Southwest Shandong and western Central Shandong on July 4-5, 2008, in terms of weather situation, influence system, diagnosis and analysis of the physical quantity field, etc. According to the analysis, the rainstorm weather process resulted from the typical westerly trough＇ s meeting the SW warm and wet flow on the edge of the subtropical high, and the establishment, the development and the maintenance of the low-level jet provided strong vapor and energy for the heavy rain area. Because the mid-layer and the lower layer lacked the convergence system such as shear line, although there is a good passage of vapor in Shandong Province, the rainstorm weather occurred only locally for the moisture convergence was centered in the local area. All kinds of energy indexes are directive to the forecast of rainstorm.