The maximum wind force of Suzhou tornado reached 17, which caused many casualties.
Around 19: on May 14th, some areas of shengze town, Wujiang District, Suzhou City, Jiangsu Province were suddenly attacked by tornadoes, which were preliminarily judged as EF3 tornadoes, and the maximum wind force in the center was 17. Tornadoes caused casualties, local power facilities and many houses were damaged.
As of 5: on the 15th, the search and rescue was over. According to statistics, the disaster * * * caused 4 deaths (including 1 death on the spot, 2 deaths due to critical illness and 1 death due to medical treatment after being found missing), 19 minor injuries (no life-threatening observation and treatment in the hospital) and 13 minor injuries (returning home after being treated by the hospital); 84 damaged farmers, with a damaged area of 1,5 square meters; There are 17 damaged enterprises with a damaged area of 13, square meters. There was no disaster in other parts of Suzhou.
at present, the power supply in some local power-off areas has been restored, and the scene order has basically returned to stability.
The formation of tornadoes can be divided into four stages:
1. The instability of the atmosphere produces a strong updraft, which is further strengthened due to the influence of the maximum transit airflow in the rapids.
2. Due to the interaction with the wind with vertical shear speed and direction, the updraft starts to rotate in the middle troposphere, forming a mesoscale cyclone.
3. With the development and upward extension of the mesoscale cyclone to the ground, it becomes thinner and stronger. At the same time, a small area of strengthening and cooperation is formed inside the cyclone, that is, the primary tornado, which produces the same process as the cyclone and forms the tornado core.
4. The rotation of tornado core is different from that in cyclone, and its intensity is enough to make tornado extend to the ground. When the developing vortex reaches the ground level, the ground pressure drops sharply and the ground wind speed rises sharply, forming a tornado.
The above contents refer to the xiaoxiang morning herald-Suzhou tornado. The maximum wind force reached 17, resulting in 4 deaths.