Wind Grade Table of Campus Meteorological Station

The name of the grade refers to the characteristics of land objects, which is equivalent to the wind speed (m/s) at a height of 10 meter on the flat ground. The average wind speed is 0, and the smoke rises linearly. 0.0 ~ 0.20 1 Soft wind and smoke can indicate the direction of the wind, and the leaves shake slightly. 0.3 ~ 1.5 1.2 The breeze made people feel the wind, the leaves made a slight sound, the flags began to fly, and the tall grass began to shake. 1.6 ~ 3.323 The leaves and twigs of the breeze kept shaking, the flag spread, and the tall grass kept shaking. 3.4 ~ 5.444 The wind can blow up the dust and paper on the ground, the branches shake and the tall grass fluctuates. 5.5-7.975, the leaves and small trees are swaying in the cool breeze, there are small waves on the inland water surface, and the high grass waves fluctuate obviously. 8.0 ~ 10.796 Strong winds shake branches, wires whir, it is difficult to hold umbrellas, and tall grass falls to the ground from time to time. 10.8 ~13.8127 The whole tree shook and its branches bent, making it inconvenient to walk in the wind. 13.9 ~17.1.1.68 Strong winds will break twigs, and people will feel great resistance when they go against the wind. 17.2 ~ 20.7 19 9 The thatched cottage is damaged, the roof tiles are lifted, and the branches can be broken. 20.8 ~ 24.4 23 10 Trees can be blown down and general buildings are damaged. 24.5 ~ 28.4 26 1 1 Storm trees can be blown down, and general buildings are seriously damaged. 28.5 ~ 32.6 3 1 12 hurricanes are rare on land and have great destructive power. & gt32.6》33