Does the typhoon affect the weather in Henan?

Typhoon has an effect on the weather in Henan.

The first is the influence stage of the peripheral cloud system after typhoon Du landed. After the typhoon landed on the morning of July 28th, its peripheral spiral cloud system began to affect Henan Province after 12. From 0: 00/2 on the 28th to 2: 00 on the 29th, there were heavy rains in the east of Beijing-Guangzhou line and some counties and cities in Luoyang and Sanmenxia, and heavy rains in Puyang and Xinyang.

Second, Typhoon Du weakened the influence of low-pressure noumenon. From 29th to 30th, the typhoon weakened the low-pressure circulation and passed through Henan Province, which was the heavy precipitation period of this process. From 2: 00 to 30: 00 on the 29th 14: 00, there were violent storms in most parts of Henan province, heavy rains in some counties and cities in the north-central, eastern and southeastern parts of China, and heavy rains in some counties and cities.

Thirdly, after Typhoon Du went northward, its residual circulation had the same influence stage as the warm and humid airflow around the subtropical high. From noon on the 30th to the morning of August 1, heavy rains occurred in some counties and cities in northern and central Henan, Pingdingshan and Luoyang, and some heavy rains occurred in Hebi, Xinxiang, Anyang, Xuchang, Pingdingshan, Zhengzhou and Luoyang.

Structure of typhoon:

Typhoon is a deep low-pressure system, and its central air pressure is very low. There is an air flow converging towards the center at the lower level, and the air flow at the upper level mainly diverges outward. If the typhoon is cut horizontally, we can see that there are three obviously different areas, from the center to the outside: typhoon eye area, cloud wall area and spiral rain belt area.

Typhoon Eye Area: It's strange that the wind here is very light and the weather is sunny, with an average diameter of 40 kilometers. The sailors who participated in it humorously called Typhoon Eye "Xanadu".

Cloud wall area: the cloud wall area with a width of tens of kilometers and a height of more than ten kilometers around the typhoon eye, also called eye wall. The cloud wall is towering here, the wind is howling, the rain is pouring, the sea is churning, and the weather is the worst.

Spiral rain belt area: Outside the cloud wall, there are spiral rain belts, and several rain (cloud) belts gather spirally around the eye wall. The rain is tens to hundreds of kilometers wide and several Qian Qian meters long. There will be showers and windy weather where the rain belt passes.

Baidu Encyclopedia-Typhoon