Major heavy rainfall events in China from April to October in 2018

Abstract

Based on 2 400 daily precipitation data in mainland China and operational synoptic charts, the major heavy rainfall events happened in China from April to October in 2018 were selected by comparing their precipitation with the average precipitation from 1981 to 2010. The main synoptic systems, rainfall period, rainfall area and accumulative amount of precipitation of these events was summarized. Results indicated that there were 178 heavy rainfall days, 31 major heavy rainfall events during the same period. There were 10 typhoon landfalls in China, 2.8 more than normal. The overall intensity of landing typhoons were weak and there landing locations were northward comparing to normal. Three typhoons landed in Shanghai. The maximum daily precipitation was 351.3 mm, which occurred at Shangqiu station of Henan province on 8th August in 2018, caused by No.1818 typhoon Rumbia. The maximum accumulative precipitation was 467.0 mm, which occurred at Zhongshan station of Guangdong province from 5th to 9th June in 2018, caused by No.1804 typhoon Ewiniar. The First Rainy Season in South China and the Meiyu Season both were characterized by late beginning, early ending and less rainfall amount comparing to normal.

Keywords

• heavy rainfall
• typhoon
• synoptic system
• 2018