First of all, the direction of the wind column represents the direction of the wind. The wind pole pointing to the west indicates the east wind, and so on, you can know the wind direction.

Second, the wind tail represents the wind speed instead of the wind level, the long wind tail represents the wind speed of 4m/s instead of two levels, the short wind tail represents the wind speed of 2m/s, and the pennant represents the wind speed of 20m/s ... So if you want to know the wind speed, you can add up the values represented by the wind tail in turn.

wind scale

The "changeable weather" section in junior high school only requires six winds and eight winds. Occasionally, Changfeng is called four winds twice, and Wufeng twice and a half. It is estimated that a lazy middle school teacher summed up the law: "Oh, there are two winds at the end of the long wind and one wind at the end of the short wind." So this statement spread happily.

The wind scale we usually use is based on Platts scale, which is usually divided into 0- 12. The classification of Purkinje Scale is not uniform. In order to prevent typhoon, we expanded the scale of Pu. If a low pressure can be named "typhoon", its central wind speed will basically exceed 12.

In this case, the Beaufort scale is basically a fraction in front of the typhoon, and it can't be used to measure the power of the typhoon at all, so we introduced the wind scale of 13- 18.