To what extent is the heavy rainfall in Henan affected by the typhoon?

"Although' Fireworks' has not landed in China, there will be an obvious easterly airflow between its north side and the western Pacific subtropical high, which will continue to be transported to Huanghuai area." Chen Tao, chief forecaster of the Central Meteorological Observatory, said that under the guidance of easterly winds, a large amount of water vapor gathered from the sea to Henan, providing an adequate source of water vapor for heavy rainfall in Henan.

Chen Tao said that the heavy rainfall was not only affected by typhoon, but also by continental high and subtropical high. "In the past few days, Henan has been between two high-pressure systems, and the precipitation weather system has been maintained or stagnant here, resulting in continuous heavy rainfall."

In addition, the special topography of Taihang Mountain and Funiu Mountain in Henan Province can uplift and converge the easterly airflow. The heavy precipitation areas in the west and northwest of Henan Province are stable and less moving, and the precipitation before the windward slope increases obviously.

Su Aifang, deputy director of the Henan Meteorological Observatory, said: "The small and medium-scale convection in the front area of Funiu Mountain develops repeatedly and moves towards Zhengzhou, forming a' train effect', which leads to heavy rainfall intensity and long duration, resulting in local heavy precipitation."

There will still be rain in Henan province in the next three days.

The Central Meteorological Observatory predicts that in the next three days, there will still be rainfall in Henan Province, with 2 1 day heavy rainfall, and there will be heavy rain in Zhengzhou and local heavy rain. 2 1 day, there is heavy rain in central and northern Henan, heavy rain in some parts of the north, and heavy rain in some parts; There is heavy rain in Zhengzhou area, with local heavy rain (50 ~ 120mm).

On the 22 nd, there was little to moderate rain in central and western Henan; There is little to moderate rain (5 ~ 15mm) in Zhengzhou area. On the 23 rd, it was small to moderate rain in central and western Henan; There are scattered showers (1 ~ 5mm) in Zhengzhou area. This round of heavy rainfall tends to weaken and end.

Statistics of precipitation released by the Central Meteorological Observatory show that from 2: 00 on the 20th to 2: 00 on the 20th, the precipitation in Zhengzhou reached 622.7mm, and the precipitation in Xinmi, Xingyang, Yanjin, Songshan, Yanshi, Xinxiang and Yuanyang exceeded 250mm, reaching the level of torrential rain.

Refer to the above? South China Morning Post-To what extent is the heavy rainfall in Henan affected by typhoon?