How is the magnitude of the wind measured? How are the levels of wind divided?

The strength of the wind is usually expressed in terms of the wind rating, which can be estimated by the situation when the ground or sea surface objects are blown by the wind. At present, the internationally accepted wind estimation is based on the Beaufort wind scale. The Beaufort was the first wind rating standard for British admirals in 1805.

First it was only used at sea, and then it was also used on land, and it has been repeatedly revised to become the common wind scale today.

Beaufort scale for land applications.

Beaufort Wind Grade Wind Vulgar Term.

General Narrative Meters per second m s miles per hour.

No wind calm

Smoke straight up Less than 1

Soft breeze light breeze

Smoke alone indicates the direction of the wind, but not the wind vane.

Slight breeze

The human face feels the wind, the leaves shake, and the ordinary wind vane turns.

Gentle breeze

Leaves and twigs sway, flags flutter.

Japanese-style moderate breeze

Dust and shredded paper are blown by the wind, and the branches of the trees are shaken.

Fresh breeze

The leafy tree began to sway.

Strong breeze

The branches of the tree swayed, the wires whistled, and it was difficult to open the umbrella.

Swift near gale

The whole tree shakes, and it is difficult to walk against the wind.

Elementary school students know that summed up by the phenomena of life"Grade 10 song"

For example, the zero-level smoke column goes straight to the sky, and the first-level green smoke deviates with the wind;

The scientific method is measured with professional instruments.

Gentle drizzle and a gentle breeze.

In meteorology, the wind force is divided into 12 levels according to the wind speed, plus no wind level 0, a total of 13 levels. Exceeding the maximum level of 12 is called level 12 or above.

Level 0 Calm Wind <1 kmh.

Category 1 soft wind 1 5 km h.

Level 2 Light wind 6 11 kmh.

Level 3 Light Wind 12 19 kmh.

Category 4 Zephyr 20 28 kmh.

Level 5 Breeze 29 38 kmh.

Category 6 strong wind 39 49 kmh.

Category 7 Wind 50 61 kmh.

Category 8 Gale 62 74 kmh.

Category 9 Gale 75 88 kmh.

Category 10 Squally 89 102 kmh.

Category 11 storm 103 117 km h.

Category 12 hurricane >117 kmh.

As for the 17 and 15 levels, they are calculated based on the wind speed.

As for the 12-18 scale, it is a typhoon.

The magnitude of the wind is divided into 13 grades, which are called wind levels, referred to as wind scales, and are recorded in the number of 0 to 12 grades. The wind direction is generally expressed in 8 directions, namely: north, northeast, east, southeast, south, southwest, west, and northwest.

No Wind: Category 0 wind, wind speed of 0 m s, manifested as immobility of leaves.

Soft wind: Category 1 wind, wind speed of meters and seconds, manifested by slight movement of leaves.

Soft wind: Category 2 wind, wind speed of meters and seconds, manifested by the slight movement of leaves.

Breeze: Category 3 wind, with a speed of meters and seconds, which is manifested as small branches shaking endlessly.

Zephyr: Category 4 wind, wind speed of meters and seconds, manifested by small tree branches shaking.

Breeze: Category 5 wind, wind speed of meters and seconds, manifested by large tree branches shaking.

Strong Wind: Category 6 wind, wind speed of meters and seconds, manifested by the shaking of the whole tree.

Gale: Category 7 wind, with a speed of meters and seconds, manifested by broken branches.

Gale: Category 8 wind, wind speed of meters and seconds, manifested by large tree branches breaking.

Gale: Category 9 winds with a speed of meters and seconds, which manifests as small trees being blown down.

Gale: Category 10 winds with a speed of meters and seconds, manifested as trees with thick bowls being blown down.

Storms, hurricanes: 11 12 winds, wind speed greater than 28 m s, manifested by large trees being blown down or uprooted.

Meteorologically: when the wind speed is meters and seconds, it is called a gale. Gale is a natural phenomenon, it is the rapid movement of air.

Gale can be divided into cold wave gales, thunderstorms, typhoons, and tornadoes due to different causes. In the weather forecast, we often hear about the wind type key socks force or level. So how do we identify the level of wind in our lives?

Let the table below help us. Wind Rating (Grade) Name of Wind Water and Vessel Signs Land Physical Evidence Considerable Wind Speed (m Seconds) 0 No Wind The sea is calm and the smoke is straight up 0 1 Soft wind The microwave is like a fish scale, and there is no wave. Ordinary fishing boats are slightly shaken Smoke can indicate the direction of the wind, and the leaves are slightly shaken, but the wind vane cannot be rotated 2 Light wind Small waves, the wavelength is still short, the waveform is significant, and the crest of the wave is bright but not broken.

When the fishing boat spreads its sails, it can move with the wind 2-3 kilometers per hour The human face feels the wind, the leaves make a slight sound, the wind vane can turn, and the tall grass begins to shake 3 The breeze The small waves increase, the crest of the wave begins to break, the end of the wave is bright, and sometimes there can be scattered white waves. The fishing boat began to flutter, and the sails moved with the wind at 5-6 kilometers per hour The leaves and twigs swayed, and the flags and tall grass swayed 4 The wind and the waves became longer, and the white waves appeared in groups. When the fishing boat is full of sails, it can make the hull tilt to one side It can blow up dust and paper on the ground, the branches are shaken, and the tall grass is undulating in waves 5 Clear and strong wind Medium waves, with a more significant long wave shape, many white waves are formed, and the fishing boat needs to shrink the sail Part of the small trees with leaves swaying, and there are small waves on the inland water surface, and the waves of the tall grass are obviously undulating 6 Strong winds Mild waves begin to form, and there are larger white foam peaks everywhere, fishing boats double their sails, and fishing needs to be aware of risks Large branches shake, wires whirring, umbrellas are difficult, and tall grass falls to the ground from time to time 7 Strong winds Mild waves, broken waves into white foam along the wind direction in the shape of strips, fishing boats no longer leave the port, at the sea anchor.

The whole tree shakes, the large branches bend down, and it is inconvenient to walk in the wind 8 Strong winds Moderately large waves, with long wavelengths, the edges of the crest begin to break into droplet sheets, and the white foam is in a distinct strip along the wind direction. Fishing boats in the near harbor will not stay Branches are broken, and people move forward, feeling great resistance 9 Gale Gale Waves, thick bands of white foam along the wind direction, the crest of the wave begins to roll, droplets can affect visibility, and sailing ships are difficult to navigate The grass house is damaged, the roof tiles are lifted, and the branches of large trees can be broken 10 Gale Wild waves, the crest of the wave is long and rolling, the white foam appears in pieces, and the white foam is a white dense strip along the wind direction, and the sea surface is bumpy and vibrating. Visibility is affected, and sailing is dangerous Rare on land, when seen, trees can be uprooted or buildings can be heavily damaged 11 Storm Extremely rough, the sea surface is completely covered by white foam blowing along the direction of the bright wind, the waves break into foam everywhere, visibility is affected, and the sailboat encounters extreme danger Very few on land, and some buildings are seriously damaged 12 Hurricane The sea is completely white, and visibility is seriously affected Very few on land, and its destructive power is extremely great.

Meteorologically: when the wind speed is meters and seconds, it is called a gale. Gale is a natural phenomenon, it is the rapid movement of air. Gale can be divided into cold wave gales, thunderstorm gales, typhoons and tornadoes due to different causes.

In weather forecasts, we often hear wind magnitude or magnitude. So how do we identify the level of wind in our lives? Let the table below help us.

Wind rating (level).

Windy. Name.

Signs of water surface and vessels.

Terrestrial physical evidence.

Considerable wind speed (m s).

No wind. The sea is calm.

Quiet, smoke straight up.

Soft wind. The microwave is like a fish scale, and there are no waves. Ordinary fishing boats shook slightly.

Smoke can indicate the direction of the wind, and the leaves shake slightly, but the weather vane cannot turn.

Light breeze. Small wavelets, the wavelength is still short, the waveform is significant, and the crest is bright but not broken. When the fisherman boat spreads its sails, it can move with the wind for 2-3 kilometers per hour.

The wind is felt on the human face, the leaves are faintly heard, the weather vane can turn, and the tall grass begins to shake.

Breeze. The small waves increase, the crest of the wave begins to break, the end of the wave is bright, and sometimes there can be scattered white waves. The fishing boat began to flutter, and Zhang Fan moved with the wind at 5-6 kilometers per hour.

The leaves and twigs swayed, the flags and the tall grass swayed.

and wind. Small waves, the wavelength becomes longer, and white waves appear in groups. When the fishing boat is fully sailed, the hull can be tilted to one side.

It blows dust and paper from the ground, tree branches shake, and tall grass undulates in waves.

Fresh wind. Medium waves, with a more pronounced long-wave shape, many white waves are formed, and fishing boats need to be partially downset.

Small leafy trees sway, inland water surface has small waves, and tall grass waves are obviously undulating.

Strong winds. Mildly large waves are starting to form, there are bigger foam peaks everywhere, fishing boats are doubling down on their sails, and fishing needs to be aware of the risks.

The branches of the trees swayed, the wires whirred, the umbrellas were difficult, and the tall grass fell to the ground from time to time.

Gales. Mild waves, broken waves into white foam along the wind direction in the shape of strips, fishing boats no longer leave the port, at the sea anchor.

The whole tree shakes, the large branches bend down, and it is inconvenient to walk in the wind.

Gale. Moderately large waves, with longer wavelengths, the edge of the crest begins to break into droplet sheets, and the white foam appears in distinct bands along the wind direction. Fishing boats in the vicinity of the harbor will not be able to stay.

The twigs are broken, and the person moves forward, feeling the resistance.

Gale force. Wild waves, white foam along the wind direction in the form of old and medium dense bands, the crest of the wave begins to roll, droplets can affect visibility, sailing difficult sailboats.

The grass house was damaged, the roof tiles were lifted, and the branches of the large sedan chair could be broken.

Wind. Wild waves, the crest of the wave is long and rolling, the white foam appears in pieces, and the white foam is a white dense strip along the wind direction, and the sea surface is bumpy and has a sense of vibration. Visibility is impossible, making sailing dangerous to navigate.

It is rare on land, and when seen, it can uproot trees or cause serious damage to buildings.

Storm. The sea was completely covered by white foam blowing in the direction of the wind, and the waves broke into foam everywhere, affecting visibility and causing extreme danger to the sailing boat.

There are very few buildings on land, and some buildings have been severely damaged.

Hurricane. The sea turned completely white, and visibility was severely affected.

There are very few on land, and its destructive power is extremely high.

The magnitude of the wind is often expressed in terms of the number of winds. The level of wind is determined based on the degree of influence of the wind on objects on the ground. 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.

Category 2 wind. The level 6 wind is called a strong wind, the branches of the Chang Crack Group are shaking, the wires are whirring and the orange sound is resistant, 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.

The level 10 wind is called a strong wind, and the source shed is rarely seen on land, which can uproot trees, and the damage to buildings is heavier.

Winds above level 12 are called typhoons or hurricanes (called typhoons in the Pacific region), and they are extremely destructive and rare on land.

Category 6 winds. 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.