Twelve-level wind bell

First-class light smoke deviates with the wind;

The second breeze blows the face;

Three-level moving leaf red flag exhibition;

Four-stage branch flying paper;

Five-level small trees sway in the wind.

Level 6 is difficult to carry an umbrella;

It is inconvenient to walk in the wind in the seventh grade;

Eight winds blow off branches;

Nine-level roof flying tiles;

Ten-level uprooting trees and toppling houses;

Eleven or two grades are rare.

Extended data

Wind scale, referred to as wind scale, is a representation of wind strength (wind power). Wind power refers to the strength of the wind blowing on an object.

Generally speaking, according to various phenomena caused by wind blowing on objects on the ground or water surface, the wind force is divided into 13, with a minimum of 0 and a maximum of 12.

According to the national standard "Wind Grade" issued in June of 20 12, and according to the wind speed at the height of 10 meter in the standard meteorological observation field, the wind grade is divided into 18 grade in turn. There are three commonly used units to express wind speed, namely nautical mile/hour, meter/second and kilometer/hour, and the commonly used unit for typhoon forecast in China is meter/second.

reference data

Baidu Encyclopedia-Wind Grade Table