Fortune telling Henan rainstorm _ Henan rainstorm fortune telling

Why is this rainstorm in Henan so strong?

The torrential rain in Henan province is threatening, many places are destroyed by the sudden rainstorm, and many people are also greatly hurt.

At the same time of emergency rescue, there is another question. Why is this rainstorm in Henan so strong?

According to the chief explanation of Zhengzhou Meteorological Observatory, there are three main reasons.

① The cause of typhoon.

Although the distance of Typhoon Fireworks is 0/000 km from China/KLOC-,it has controlled the rainstorm in Henan province remotely.

Under the guidance of "fireworks" and subtropical high, a large amount of water vapor is continuously transported from the sea to the land through the east wind, and it gathers into rain in Henan.

② Topographic reasons.

After the easterly airflow meets Taihang Mountain and Funiu Mountain in Henan Province, it converges and rises in front of the mountain, resulting in concentrated rainfall range and stronger rainfall.

③ Meteorological reasons.

The atmospheric circulation situation is stable, which leads to long rainfall duration. At present, only when the typhoon "Fireworks" is closer to China, the circulation situation will be adjusted, the source of water vapor will be cut off, and the rain in Henan will stop. ?

According to @ Henan Daily, Zhengzhou Meteorological Bureau made a data collation and summary of this rainstorm.

On the 20th of Zhengzhou, from 16 to 17, the hourly rainfall reached 201.9mm..

19 From 20: 00 on September 9 to 20: 00 on the 20th, the single-day rainfall was 552.5mm.

From 20: 00 on June 7 to 20: 00 on June 20, the three-day rainfall was 6 17. 1 mm. ..

Among them, the hourly precipitation and single-day precipitation both exceeded the historical record of 60 years since Zhengzhou Station 195 1 was established.

The average annual rainfall in Zhengzhou is 640.8mm, which is equivalent to the three days of the previous year.

The reason is that the subtropical high moved northward more than half a month earlier this year, and the subtropical high center moved northward to the northeast. The nearest crystal day in Shanghai is at the southern edge of the subtropical high, and the southeast wind blows at sea.

These days, Shanghai's magnificent clouds are actually transporting water vapor to the hinterland of the Central Plains. The subtropical high pushed northward, which provided enough space for typhoon activities. The generation of typhoon fireworks is strengthened like a water pump, pumping more water vapor to central China on the edge of subtropical high. Typhoon Chapaka meets in the southwest, sending water vapor from the southwest monsoon to the north.

At the same time, the approach of typhoon attracted the cold high pressure from north to south, which killed the position of the northwest rain belt, so the continuous rainstorm in Henan was formed.

Since the storm is coming, it has brought great influence to the people of Henan. We must do a good job in rescue work to ensure the personal safety of the people.