According to what, how many grades does Beaufort wind have?

Grade 12:? Hurricane (typhoon, also known as hurricane).

13: TY? (Typhoon)

14 and 15: STY (strong typhoon).

Grades 16 and 17: Super TY? (Super typhoon).

The following is the comparative relationship between wind grade and wind speed of gale above 12:

12: 32.7-36.9 m/s

Grade 13: 37.0-4 1.4m/s

Grade14: 41.5-46.1m/s.

15: 46.2-50.9 m/s

Grade16: 51.0-56.0m/s

Grade17: 56.1-61.2m/s

type

Due to the difference of wind speed, wind direction and humidity, many types of wind will be produced. Blast, gale, gale, gale, storm and hurricane, these common wind types, Beaufort wind force are seven, eight, nine, ten, eleven and twelve respectively.

Gust: When the air speed is high and low, the wind will be high and low, and there will be waves of feeling when blowing on people. This is a recognized gust of life. Meteorology, wind speed usually refers to the average situation within 2 minutes, with high or low wind speed, and gust usually refers to the maximum instantaneous wind speed during this period. If the weather forecast, today's wind is 4-5, and the gust is 6, which means that today's average wind is 4-5, and the maximum instantaneous wind can reach 6.