Is there more or less rain in Henan this year?

There is a lot of rain in Henan this year.

It is estimated that this summer (June-August), the precipitation in our province will be more in the northeast and less in the southwest, 20-30% more in the north and east of Henan, 0-20% more in the middle and east of Henan, and 0-20% less in most other areas. It is estimated that most of southern Henan will be higher than 1 ~ 2℃ this summer, and other parts will be higher than 0 ~ 1℃.

During the flood season this year, the precipitation in our province is unevenly distributed, especially in the northern and central regions, where there is a great possibility of rainstorm and flood. It is necessary to do a good job in preparing for staged heavy precipitation and heavy rains and floods, and do a good job in preventing waterlogging and floods in small and medium-sized rivers and cities. There is a great possibility of geological disasters caused by mountain torrents in northern and western Henan, so it is necessary to prepare for defense.

From June to August, the frequency of short-term heavy precipitation increases, and strong convective weather such as thunderstorms and hail is more frequent. Measures such as prevention, resistance and avoidance should be taken to reduce the impact on industrial and agricultural production, infrastructure and personal safety. It is expected that there will be more typhoons landing this summer, and there may be typhoons heading north. It is necessary to guard against the impact of typhoon and rainstorm in July and August on the eastern and southern regions of our province.

The reasons for the heavy rain in Henan are:

Because most of Henan Province is located in the warm temperate zone, the south is subtropical, which belongs to the continental monsoon climate with the transition from the north subtropical zone to the warm temperate zone, and has the characteristics of the transition from the plain to the hilly mountain climate from east to west, the average annual precipitation is generally between 407 ~ 1298 mm, and the rainfall is the most in June and August.

Henan has a warm temperate-subtropical, humid-semi-humid monsoon climate with abundant rainfall in summer. Henan province is located in the transitional zone between north and south climate, with many kinds, high intensity and high frequency of meteorological disasters, which is one of the provinces with frequent meteorological disasters in China.

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. At that time, Henan was on the edge of subtropical high control, and the convection was very unstable. In addition, a typhoon "fireworks" is being generated, and a large amount of water vapor is guided and transported to Henan. Convective weather developed repeatedly in Funiu Mountain area of Henan Province and moved to Zhengzhou.

Convergent uplift occurred in front of the mountain, and the terrain led to concentrated rainfall range and strong rainfall. 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.