What is the strong wind?

According to the wind level, the strong wind is above 6.

According to various phenomena caused by wind blowing on objects on the ground or water surface, the magnitude of wind power is divided into 18, with the minimum being 0 and the maximum being 17.

Wind speed is the forward speed of the wind. The greater the air pressure difference between two adjacent places, the faster the air flow, the greater the wind speed and the greater the wind force. Therefore, the magnitude of wind is usually expressed by wind power. The unit of wind speed is meters per second or kilometers per hour. When the weather forecast is released, the wind level is mostly used.

The wind rating table is based on the wind speed of 10 meters above the ground on the flat land. Generally, it is expressed by 0 to 12 * * 13, but in special circumstances, there is a wind level above 13. For example, when Typhoon Sang Mei hit Fujian in 2006, the maximum gust measured at Hezhangyan in Fuding was above 17 (75.8m per second).

Extended data:

There are 2-3 kinds of gusts superimposed on the strong wind speed, especially the gust every 3-5 minutes is the most regular. During the gale, even in the boundary layer, the vertical airflow of the upper and lower layers of the system is reversed, and the downward airflow below 120m is stronger, but at least from 280m, it turns into a strong upward airflow.

In nature, the wind sometimes exceeds 12. For example, the central wind force of a strong typhoon or tornado may be much larger than the magnitude of 12, but the wind above the magnitude of 12 is rare, so the magnitude is generally not specified.

In the weather forecast, we often hear the expression "the north wind is 4 to 5", in which the wind refers to the average wind; If you hear the expression "gust 7", gust refers to the wind with high and low wind speed, and the wind at this time refers to the maximum wind force.

Baidu Encyclopedia-Level of Wind

Baidu Encyclopedia-Wind Grade Table