What is the reason for the strong wind of level 12 in Yueyang, Hunan?
The reporter learned from the Hunan Provincial Meteorological Bureau on the 16th that due to the simultaneous influence of the middle and low-level warm and humid jets and surface cyclone waves, strong convective weather such as strong winds, hail, and short-term heavy precipitation occurred in many places in Hunan. .
Strong winds of level 8 or above are common in the Dongting Lake area. The winds in Zhongzhou, Matang, Xinkai, and Jangkou towns in Yueyang County reached EF1 tornado magnitude (level 12) on the evening of the 15th. In some areas As a result, houses collapsed or damaged, agricultural greenhouse facilities were damaged, and trees were broken due to disasters.
It is understood that this severe convective weather is fierce and destructive. According to the person in charge of the Yueyang Flood and Drought Disaster Prevention Center, officials and people in the disaster-stricken areas of Yueyang City are making every effort to rescue and provide disaster relief. Relevant departments such as electricity, communications, urban management, and transportation are rushing to drain waterlogged water, clean up broken trees, and relocate people threatened by the storm. people, etc., to prevent secondary disasters.
Extended reading - The mechanism of strong wind:
The horizontal movement of air is called wind. Wind is a physical quantity that represents the movement of airflow. Wind is a vector, which not only has a numerical magnitude (wind speed), but also a direction (wind direction).
The movement of air is caused by force. In addition to gravity, the forces acting on the air also include the pressure gradient force caused by the uneven distribution of air pressure, the geostrophic deflection force caused by the rotation of the earth, and the relative motion between air layers and between the air and the ground. The friction force generated is due to the inertial centrifugal force generated when the air moves in a curve. Different combinations of the horizontal components of these forces constitute different forms of atmospheric horizontal motion.
Among them, the air pressure gradient force is the direct cause and driving force for the horizontal movement of air.
For the above content, please refer to the Beijing Daily Client - A strong wind of magnitude 12 occurred in Yueyang, Hunan, and some areas were affected