Cause analysis of Zhengzhou 720 rainstorm

The reason for the formation of Zhengzhou 720 rainstorm is that this area of Henan Province is affected by the vortex system, and the water vapor in the east of low altitude is constantly replenished. In addition, due to the uplift of Taihang Mountain, it caused such heavy rainfall.

Henan is on the edge of subtropical high, and the energy of convective instability is sufficient. Under the guidance of the typhoon periphery and the east-south airflow of subtropical high, a large amount of water vapor is transported to the inland areas of China, which provides a rich source of water vapor for heavy rainfall in Henan and has high precipitation efficiency. When several convective clouds pass through a place in turn, the precipitation they produce will accumulate, which will lead to heavy rain, even heavy rain.

Taihang Mountain is the tail of the whole southwest section of Taihang Mountain, which constitutes the natural dividing line between Shanxi Plateau and North China Plain. The Funiu Mountain Range, which extends from Qinling Mountains to Henan, constitutes an important watershed of the three major water systems of the Yellow River, Huaihe River and Yangtze River.

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

Matters needing attention in rainstorm weather

1, when it rains, thunders and lightning, don't go to the trees or the walls of buildings to hide from the rain.

2. When it rains, thunders and lightning, try to avoid wires, don't pass under them, and don't touch them with your hands.

3. When it rains, thunders and lightning, try to wear shoes, and don't walk barefoot or play with water.

4. Try to operate all electrical equipment without using a mobile phone.

5. Try not to take the motorway and take the sidewalk.

6. When crossing the intersection, pay attention to the traffic and don't grab the road with the motor vehicle.

7. When taking all kinds of traffic vehicles, you should warn the drivers on board that they must go slowly, don't grab the road, don't grab time, and would rather be late than have a traffic accident.

Refer to the above content: Baidu Encyclopedia-July 20, Zhengzhou rainstorm