暴雨的落区是由副高脊线、西脊点的位置确定的；
Rainfall areas were decided by the line of subtropical ridge and western points of the subtropical ridge.
太平洋副热带高压大而强，位置偏南，脊点偏西。南半球冷空气活动比常年少而弱。
The Pacific subtropical anticyclone appears strong and large, its position leans toward south, and its ridge extends to west.
热带西北太平洋西部热含量增加时，副热带高压脊点偏西，移入南海的热带气旋频数增加，反之减少。
When heat content increased, the ridge point of subtropical high moved more westly, and frequency of tropical cyclone moving from Pacific into South China Sea increased, otherwise it decreased;
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