Which places are prone to tornadoes?

When meteorological conditions are met, the plain area is a relatively high incidence area of tornadoes. The middle and lower reaches of the Yangtze River, the Pearl River Delta, the Northeast Plain and the North China Plain are all tornado-prone areas. The plain area is densely populated, so special attention should be paid to prevention and response.

Tornadoes in China are mainly divided into four grades. Among them, the intensity of the first-class tornado is weak, and the maximum gust wind speed near the ground (hereinafter referred to as Vmax) is less than or equal to 38 m/s; The secondary tornado has moderate strength, 38m/s < VMAX ≤ 49m/s; The intensity of the third-class tornado is strong, 49 m/s < < Vmax≤74 m/s; Class 4 tornadoes are extremely strong, with VMAX > 74m/s.

According to the characteristics of tornado itself and the limitations of forecasting and early warning, there should be three levels of prevention:

First, a long time before the weather, such as a few hours to a few days, the weather forecast will have a reliable guess of the tornado background, that is, the possibility of strong convective weather. At this time, we should pay more attention to the subsequent approaching forecast and early warning;

Second, when paying attention to the approaching forecast and warning issued by the meteorological department a few minutes to a few hours ago, we should reduce going out and go to a safe place to avoid strong convective weather and possible tornadoes;

Third, when faced with the threat of tornado, if you are outdoors, you should observe the dynamics of tornado and avoid its path in time. If you are indoors, you should stay away from doors, windows and the outer walls of the house and hide in a relatively solid and permanent reinforced concrete structure building. The safest place is the basement or semi-basement.

In case of telephone pole collapse, house collapse and other emergencies, the power supply should be cut off in time to prevent electric shock or fire; When driving out and encountering a tornado, you must never drive to avoid it, and don't avoid it in the car. You should leave the car immediately and take refuge in low-lying areas.

The above content refers to the cover news-Suzhou Wuhan was hit by a tornado Expert: At present, China has entered a period of high incidence of strong convection.