News on June 2nd, a few days agoRare simultaneous tornadoes in Haizhou District, Fuxin District, Shenyang Faku County, Tieling Kaiyuan City, Liaoning ProvinceAs a result, roofs have been lifted off in some areas, and even moving vehicles have been rolled up half of their bodies. at the same time, many high-speed trains have been delayed or suspended.
According to media reports, Qian Daili, a senior experimenter in the atmosphere and Environment experiment Teaching Center of Nanjing University of Information Engineering, said that according to the analysis of previous historical data,Generally speaking, tornadoes in Liaoning last for more than 5-10 minutes, less for more than 20 minutes, and even less for as long as 30 minutes.
In addition, according to expert research, the tornado in Liaoning is mainly caused by the joint influence of the upper trough and the lower shear line in Liaoning Province.
Due to the gradual transport of high-altitude cold air to Liaoning, and the confluence of low-level warm and humid air to Liaoning, a very strong form of instability has emerged.As a result, tornadoes rarely seen in history occurred in Liaoning almost at the same time.
It is understood that as a highly destructive strong convective weather, tornadoes are a small-scale air vortex produced under strong unstable weather conditions. The central wind force can reach 50-150 meters per second, and the diameter is generally between a few meters and hundreds of meters.
Tornadoes generate and disappear quickly.It is often accompanied by severe convective weather systems such as thunderstorms, hail and rainstorms.It's very destructive.
According to the Fujita series, the tornado strength can be divided into 6 grades from EF0 to EF5, with EF0 being the lowest and EF5 the highest.