The magnitude of the wind is expressed by wind power. The greater the wind, the greater the wind speed, and its performance is also different. Generally speaking, the wind level is mostly used when issuing weather forecasts. That is, start from level zero (no wind), then level one and two. . . . Each level corresponds to a range of wind speed. The following is a detailed wind level table, also called wind level table.
Grade name Wind speed (m/s) Wind characteristics 0 No wind 0～0.2 Smoke straight up, leaves do not move 1 Soft wind 0.3～1.5 The wind direction can be measured according to the smoke, and the weathercock does not move 2 Light wind 1.6～3.3 Leaves are sandy There is a feeling of wind on the face 3 Light breeze 3.4～5.4 Leaves and twigs move slightly 4 Gentle breeze 5.5～7.9 Dust, thin paper flying, twigs sway 5 Cool breeze 8.0～10.7 Small tree trunks and big branches swing 6 Strong wind 10.8～ 13.8 Large branches swing, and electric wires whistling noises 7 High winds 13.9～17.1 Small trees sway, big branches bent 8 Strong winds 17.2～20.7 Small trees and dead branches break, difficult to move in the wind 9 Strong winds 20.8～24.4 Large branches break, light objects move, destroying chimneys And tiles 10 Strong wind 24.5～28.4 Tree uprooting 11 Storm wind 28.5～32.6 Great damage 12 Hurricane greater than 32.6 Damage after damage
Remarks: The measurement of wind direction and speed can be directly measured and displayed with a wind direction anemometer.
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