The weather in Beijing in July 17

On July 17, a large-scale heavy rainfall began to appear in Henan Province of China. Suddenly, the rain poured down and the flood crossed. A serious flood disaster occurred in Henan Province, which caused many geological disasters. The people of Henan province were seriously affected by the disaster, which aroused the concern of the whole country. The people of the whole country also began to help Henan, and the people United to fight floods, showing the warmest side of the world.

On July 20th, from 16 to 17, the hourly rainfall in Zhengzhou, Henan Province exceeded 200mm. Such a huge amount of rainfall rarely happens, and some of it is shocking, which has exceeded the record of the maximum rainfall of one hour in recent years. Not only Zhengzhou was hit by such a serious flood, but also many cities in Henan, including Anyang, Jiaozuo and Xingyang, were affected by the flood.

Experts have also done some research on the causes of such extreme violence in Henan and given some authoritative explanations.

The rainfall in Henan province lasted for a long time, with a large rainfall intensity and a wide range. At the same time, it is accompanied by thunderstorms, strong winds and lightning. This extreme weather has caused serious floods and triggered more destructive geological disasters.

According to experts' interpretation, the main reason is that the subtropical high and continental high from the western Pacific have been maintained in the Sea of Japan and northwest China. Due to the influence of high pressure, the factors affecting rainfall have been hovering in a certain range and cannot be moved. They last for a long time in Huanghuai area of North China, and then they are affected by wind and vortex shear, which increases the probability of rainfall. ? The unique geographical structure of Henan makes the eastward airflow converge strongly, which further increases the rainfall probability.

It can be seen that the heavy rainfall in Henan was affected by both internal and external factors. These factors exist at the same time, leading to the consequences of heavy rain. Moreover, it is not only Henan that is affected by this, but also the whole North China, including Beijing, Tianjin, Inner Mongolia, Liaoning, Shandong and other places, has experienced heavy rains, accompanied by severe weather such as lightning and strong winds. This influence cannot be said to be small, nor can it be said to be wide. In the face of nature, human beings are still small and can't affect the overall situation.

In recent days, the flood has gradually receded, the weather has tended to be gentle, people's hearts have settled down a little, and Henan has begun to repair and rebuild, but the terrible flood will still leave a shadow in people's hearts.

There is nothing we can do about the flood disaster. In the future, people need to do better in weather monitoring, flood control construction and flood control. I believe that in the future, people will not just be helpless in the face of storms and floods.