2017年7月15日周口短时强降水过程成因浅析

Elementary Analysis on the Causes of Short-term Heavy Rainfall in Zhoukou on July 15,2017

利用自动气象站资料、Micaps常规资料和T639资料等气象资料,通过天气学和天气动力诊断分析方法,对2017年7月15日周口强降水过程进行了综合分析。结果表明:副热带高压北抬、前期能量积蓄是这次强降水形成的主要环流背景;冷空气触发、低空急流配合切变线以及较强的垂直上升速度为此次降水过程提供了动力条件;西南急流带来的充沛水汽,为这次强降水发生提供了水汽条件。

Based on the meteorological data of automatic weather station, Micaps routine data and T639 data, a comprehensive analysis of the heavy precipitation process in Zhoukou on July 15, 2017 was made. by means of synoptic and synoptic dynamic diagnostic analysis. The results showed that the northward uplift of subtropical high and energy accumulation in the early stage were the main circulation background for the formation of this heavy rainfall. The cold air trigger, lowlevel jet with shear line and strong vertical ascending velocity provide dynamic conditions for this precipitation process. The abundant water vapor brought by southwest jet provided water vapor conditions for the occurrence of this heavy rainfall.