How many levels of wind are there? What is the wind rating?

Force Scale Name Sea Surface Condition Coastal Vessel Signs Land Ground Signs Wind Speed at a Standard Height of 10 m Relative to Empty Flat Land Wave Nautical mile Hour Meter Seconds Kilometer Hour Average (m) Highest (m) 0 Quiet Wind Quiet, Smoke Straight Up Less than 1 0 Less than 1 1 Soft Wind Usually Fishing Boats Shake Slightly Smoke can indicate the direction of the wind, but the wind vane does not move 1 3 1 5 2 Light wind When the fishing boat spreads its sails, it can move 2 3 kilometers per hour with the wind The human face feels the wind, the leaves are slightly sounding, and the wind vane can rotate 4 6 6 11 3 Breeze The fishing boat gradually feels bumpy, It can move 5 6 kilometers per hour with the wind Leaves and twigs sway incessantly, and the flag is raised 7 10 12 19 4 Zephyr When the fishing boat is full, it can tilt the hull to one side Can blow dust and paper from the ground, and the twigs of the tree shake 11 16 20 28 5 Clear wind The fishing boat retracts its sails (i.e. a part of the sail is removed) The leafy trees are swaying, and there are small waves on the surface of the inland water 17 21 29 38 6 Strong winds Fishing boats double their sails, and fishing needs to be aware of risks Large branches are shaking, wires are whirring, and umbrellas are in trouble 22 27 39 49 7 Winds Fishing boats are anchored in the harbor, anchor at sea The whole tree shakes, and the feeling of walking against the wind remains unchanged 28 33 50 61 8 Gale Fishing boats entering the port do not stay Branches are broken, and people feel great resistance to move forward 34 40 62 74 9 Gale Difficult to sail on steamboats Minor damage to buildings (chimney tops and bungalows shaking) 41 47 75 88 10 Strong winds Steamboat navigation is dangerous Rare on land, can uproot trees or cause serious damage to buildings when seen 48 55 89 102 11 Storms Steamboats are extremely dangerous Rare on land, and if there are widespread losses 56 63 103 117 12 Hurricane Waves Rare on land, extremely destructive 64 71 118 133

There are 12 levels in the old classification, and the new 17 levels are in total.

In meteorology, it is generally divided into twelve levels according to the magnitude of the wind:

Level 0 wind is also called no wind.

Level 2 wind is called light breeze, and the leaves are slightly sounding, and the human face feels windy.

The level 4 wind is called the Japanese wind, and the twigs of the tree shake and can blow up dust and paper on the ground.

The level 6 wind is called a strong wind, the branches of large trees are shaking, the power lines are whirring, and it is difficult to walk with an umbrella.

Category 8 winds are called gales, and the branches of trees can be broken, and it is very difficult for people to walk in the wind.

Category 10 winds are called squalls, which are rare on land, and can uproot trees, causing serious damage to buildings.

Winds above level 12 are called typhoons or hurricanes, which are extremely destructive and rare on land.

There are many types of wind due to differences in wind speed, direction, and humidity. Gale, gale, gale, squall, storm and hurricane, these common types of wind, Beaufort wind force are:

Grades seventh, eighth, ninth, tenth, eleventh and twelfth.

Wind force refers to the amount of force that the wind exhibits when it hits an object. Generally, according to the various phenomena caused by the wind blowing on the ground or water surface, the magnitude of the wind force is divided into 18 levels, the minimum is 0, and the maximum is 17.

Wind speed is the forward speed of the wind. The greater the pressure difference between two adjacent places, the faster the air flow and the greater the wind speed, the greater the wind force. Therefore, the magnitude of the wind is usually expressed in terms of wind force.

The unit of wind speed is expressed in how many meters per second or how many kilometers per hour. When issuing weather forecasts, most of them use wind ratings.

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