The weather forecast often mentions tropical subtropical high. What is the weather of subtropical high?

The subtropical high mentioned in the weather forecast is a part of a large-scale atmospheric circulation system active around 3 north latitude around the world, which prevails in downward flow all the year round. Among them, the western Pacific subtropical high, which affects the summer weather characteristics in China, is called subtropical high for short.

the subtropical high can move north and south. In May, the subtropical high is located to the south of 2°N, which is the first flood season in South China. From late May to mid-June, the subtropical high jumped northward to South China for the first time, and it was rainy season in the south of the Yangtze River. From late June to early July, the subtropical high continued to move northward to the south of the Yangtze River, which was the rainy season in Huanghuai. In mid-July, the subtropical high continued to move northward to Huanghuai area, and northeast China entered the rainy season. In late August, with the strong cold air moving southward, the subtropical high in the northwest Pacific weakened and the ridge line began to retreat rapidly from north to south. In early September, the ridge line retreated to around 25°N for the first time, and the weather in China turned from north to south into crisp autumn. In early October, the subtropical ridge line retreated to the south of 2°N, ending the seasonal north-south movement with a one-year cycle. The subtropical high prevails in downward flow, and the weather is fine. When the subtropical high controls a certain area for a long time, it often causes drought in the area.