梅雨期，是指每年6月中旬到7月上、中旬，我国长江中下游区域内出现的一段连阴雨天气。此时，器物易霉，故亦称“霉雨”，又值江南梅子黄熟之时，故亦称“梅雨”或“黄梅雨”。雨带停留时间称为“梅雨季节”，梅雨季节开始的一天称为“入梅”，结束的一天称为“出梅”。
The typical circulation and the related strong precipitation during the Meiyu period over the Yangtze River basin did not appeared,however,the westerlies troughs and landing typhoons brought several rainfall processes to the Yangtze-Huaihe River basin.
江淮梅雨期典型梅雨形势没有建立,为空梅年,但西风槽和登陆台风带来了几次降雨过程。
参考来源 - 2009年夏季异常天气及其环流分析·2,447,543篇论文数据，部分数据来源于NoteExpress
梅雨期长短直接关系农业收成，其成因有多说。
Duration of Plum rainy season directly affects crop yield duo to many reasons.
造成梅雨期降水量的异常主要是极端降水的异常。
So the anomalies of the total precipitation in MeiYu period is mainly caused by the extreme precipitation anomalies.
梅雨期暴雨的误差结构主要决定于暴雨形成中起主要作用的系统。
The structure of error in Meiyu heavy rainfall is mainly dependent on the sub-weather systems, which play the most important role in the formation of Meiyu rainfall.
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