Meteorological terms for strong winds

Strong wind, the wind force near the surface layer reaches Beaufort scale 8 (average wind speed 17.2 ~ 20.7 m/s) or above. According to China's meteorological observation service, the wind whose instantaneous wind speed reaches or exceeds 17m/s (or the wind speed reaches or exceeds Grade 8 visually) is regarded as strong wind. A windy day is called a windy day. In China's weather forecast business, Beaufort's 6 (the average wind speed is 10.8- 13.8 m/s) and above are defined as strong winds.

Strong winds will damage ground facilities and buildings; The strong wind at sea affects navigation, offshore construction and fishing, which is very harmful and is disastrous weather.

There are many weather systems that produce strong winds, such as cold front, thunderstorm, squall line and cyclone. The strong wind of tropical storm appears in the strong pressure gradient area of vortex and rotates counterclockwise; The cold front gale is located after the front crossing; Thunderstorms and squall lines appear in the airflow flowing from the descending airflow, and they are dragged to the near ground by thunderstorms when they cross the boundary. The narrow tube effect of topography can increase the wind speed and make some areas become windy areas, such as Alashankou in northern Xinjiang and Taiwan Province Strait. ● In windy weather, when walking near the construction site, try to stay away from the construction site and pass quickly. Don't stay in tall buildings, billboards or trees.

● Strengthen buildings that are easily blown by the wind, such as doors and windows, enclosures and scaffolding, and properly arrange outdoor items that are easily damaged by strong winds.

● Motor vehicle and non-motor vehicle drivers should slow down.

● Immediately stop outdoor operations such as high altitude and water; Immediately stop the open-air collective activities and evacuate the crowd.

● Don't park the vehicle under tall buildings and trees to avoid glass, branches and other damage to the body. ● Pay close attention to fire hazards to avoid adding fuel to the fire and causing heavy losses.

● Pay attention to the weather forecast and prepare for the wind.

● Old people and children should not go out in windy weather.