wind scale

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 magnitude of wind power is divided into 13, with the smallest being 0 and the largest being 12. The wind power on land is generally between 0 and 9, and the wind power of 10- 12 is rare on land. If there is wind, trees will be uprooted and buildings will be destroyed, which is extremely destructive. In order to facilitate memory, its formula is:

Level 0 still wind, calm, smoke billowing.

1 soft wind, smoke pointing in the direction, oblique to the sky.

Level 2 breeze, people can feel it, and the leaves move slightly.

There is a third-class breeze, the leaves are shaking and the flags are flying in the wind.

There is a breeze of level 4, and the dust is everywhere, and the paper is sent by the wind.

Level 5 breeze, pond water waves, small trees shaking.

There is a strong wind of level 6, it is difficult to carry an umbrella, and the wires are buzzing.

Level 7 gale, difficult to walk in the wind, tree bow.

There is a strong wind of magnitude 8, branches are broken, and the waves in the rivers and lakes are fierce.

The 9-level gale blew the roof and destroyed the chimney.

In addition, according to the need, the wind power can be converted into the corresponding wind speed, that is, the distance of air flow in unit time, in meters per second, and its conversion formula is for reference: two to one is one, and three levels plus one. Grades four to nine are not difficult to calculate, and the series is reduced by two times three. Ten to twelve are rare, so ten is easy to remember. Ten-level wind speed is twenty-seven, with one more level every four levels.

That is, the wind speed of the primary wind is equal to 1 m/s, the wind speed of the secondary wind is equal to 2m/s, the wind level of the tertiary wind is added with 1, and its wind speed is equal to 4m/s, and the series from 4 to 9 is subtracted by 2, and then multiplied by 3 to get the corresponding wind speed. The wind speed algorithm from 10 to 12 is the same. The wind speed of 10 is 27m/s, and then the wind speed of 1 1 is 3 1m/s by adding 4, and the wind speed of 12 is 35m/s. ..