What is the level of the wind What is the level of the wind

The following is from Encyclopedia:

Definition of technical terms.

Chinese name: wind scale English name: wind force scale Definition: A method of expressing wind power, usually using the Beaufort wind scale. Discipline: Atmospheric Science (first-level discipline) ; Atmosphere (secondary discipline).

Wind is usually expressed in terms of wind direction and wind speed (wind force and wind magnitude). Wind speed refers to the distance traveled by an airflow per unit of time, expressed in meters and seconds or kilometers of hours.

Beaufort Scale Wind Level 0 Overview No Wind Land Quiet, Smoke Straight Up Coast Considerable Wind Speed (m s) Wind Level 1 Overview Soft Wind Land Smoke can indicate direction, but the wind vane cannot rotate Coast Fishing boats do not move Considerable wind speed (m s) Wind Level 2 Overview Light Breeze Land The human face feels windy, the leaves are slightly sounding, and the ordinary weather vane rotates Coast When the fishing boat spreads its sails, it can move with the wind Considerable wind speed (m s) Wind Level 3 Overview Breeze Land The leaves and twigs are shaking endlessly, and the flag is waving Coastal The fishing boat gradually feels the dust Equivalent wind speed (m s) Wind level 4 Overview Japanese wind Land Can blow dust and paper on the ground, and the twigs of trees shake Coast When the fishing boat is full, leaning to one side Considerable wind speed (m s) Wind level 5 Overview Breeze Land Small trees swaying Coast Waves on the water surface Considerable wind speed (m s) Wind level 6 Overview Strong wind Land Large branches are shaking, power lines are whirring, and it is difficult to lift an umbrella Coast Fishing boats double down their sails, fishing must be aware of danger Equivalent wind speed (m s) Wind level 7 Overview Wind Wind Land Big trees shake, and it is inconvenient to walk in the wind Coast Fishing boats are in the harbor, Anchoring to overseas Considerable wind speed (m s) Wind magnitude 8 Overview Gale Land Tree branches are broken, walking upwind feels very resistant Coast Ships in close port do not stay Considerable wind speed (m s) Wind magnitude 9 Overview Gale Land Chimney and roof of bungalow are damaged (chimney top and flat roof shake) Coast Steamboat navigation is difficult Considerable wind speed (m s) Wind magnitude 10 Overview Squall Wind Land Rare on land, can uproot trees and destroy houses Coast Steamboat navigation is dangerous Considerable wind speed (m s) Wind level 11 Overview Storm Land Rare on land, some are bound to suffer major damage Coast Steamboat encounters extreme danger Considerable wind speed (m s) Wind magnitude 12 Overview Hurricane Land Very few on land, its destructive power is extremely high Coast Waves Considerable wind speed (m s) or more.

It is a standard used to express the magnitude of the wind.

Wind Level 0 Overview No Wind Land Quiet, Smoke Straight Up.

Wind Level 1 Overview Soft Wind Land Smoke can indicate direction, but the wind vane cannot rotate Wind Level 2 Overview Light Breeze Land The human face feels windy, the leaves are slightly sounding, and the ordinary weather vane rotates the wind level 3 Overview Breeze Land Leaves and twigs shake endlessly, and the flag wind level 4 Overview Japanese wind Land can blow dust and paper from the ground, and the twigs of trees shake Wind Level 5 Overview Breeze Land Small trees sway.

Wind Level 6 Overview Strong Wind Land Large tree branches shaking, power lines whirring, difficulty lifting umbrellas Wind Level 7 Overview Wind Wind Land Big trees shaking, windward walking inconvenient Wind Level 8 Overview Gale Land Tree branches breaking, windward walking feels very resistant Wind Level 9 Overview Gale Land Chimneys and the roof of the bungalow are damaged.

Wind Magnitude 10 Overview Hurricane Land Rare on land, can be uprooted and destroyed 11 Overview Storm Land Rare on land, some will be heavily damaged Wind Scope 12 Overview Hurricane Land Very rare on land, and its destructive power is extremely large from the encyclopedia.

A way to represent the force of the wind.

Wind comes to grading Wind has both magnitude and direction, therefore, the wind BAI forecast includes wind du

Speed and wind direction. The magnitude of the wind speed is often expressed by several levels of wind. The level of wind is determined based on the degree of influence of the wind on objects on the ground.

In terms of meteorology, it is generally divided into 12 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 hurricanes, which are extremely destructive and rare on land. In weather forecasting, it is common to hear terms such as "north wind force 4 to 5", in which case the wind refers to the average wind force; If you hear a phrase such as "gust of 7", the gust refers to the wind speed fluctuates, and the wind force at this time refers to the wind force when it is large.

According to the phenomenon caused by the wind on the ground object, the size of the wind is divided into 13 grades, which are called wind levels, and the DAO is used

0 12 grade numeric record. Return.

A: Wind rating table.

Wind levels and symbols.

Name: Wind speed (m)*

Land objects. Sea surface waves.

Wave height (m) 0 no wind.

The smoke is calm up.

The soft wind and smoke indicate the direction of the wind.

There are no droplets at the microwave peak.

The breeze feels windy.

The small crest is not broken.

The peak of the small wave of the breeze flag is broken.

And the wind blows up the dust.

The crest of the white foam of small waves.

The wind blows and the trees sway.

Medium wave fold peak group.

Strong wind power lines have sound.

Big waves to droplets.

Difficulty walking with a blast.

Breaking the peak foaming into strips.

Strong winds break tree branches.

The waves grow high and there are waves.

Gale damages the house slightly.

The crest of the wave rolls upside down. The wind uprooted the trees.

The waves roll and roar.

Storm damage is widespread.

The crest of the wave is full of droplets.

12 typhoons. The destruction is huge.

The waves are raging. Note: The wind speed listed in this table refers to the wind speed value at 10 meters above the ground on flat ground.

I remember having it in elementary school textbooks.

Level 0: Straight up.

Grade 1: The green smoke is slightly slanted.

Level 2: Light breeze on the surface.

Level 3: Flag fluttering.

Level 4: Paper dust returns.

Level 5: Waves in the pool.

Level 6: Difficult to answer with an umbrella.

Level 7: Difficult to walk in the wind.

Level 8: Wind blows branches.

Level 9: Chimney destroyed.

Level 10: Pull down trees and houses.

Level 11: Rare on land.

Level 12: Waves are overwhelming.

There are 18 levels of wind. 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.

Wind is a natural phenomenon caused by the movement of air, and it is caused by the heat of solar radiation. Sunlight shines on the earth's surface, causing the surface temperature to rise, and the air on the surface of the earth is heated and expands lightly and rises. When the hot air rises, the cold air at a low temperature flows in laterally, and the rising air cools and becomes heavier and falls, and the air heats up to rise due to the high surface temperature, and the flow of this air generates wind.

There are 13 levels of wind, with the lowest being 0 and the largest being 12. The name corresponding to the magnitude of each level of wind is as follows: level 0 wind is called quiet wind, level 1 wind is called soft wind, level 2 wind is called light wind, level 3 wind is called light wind, level 4 wind is called gentle wind, level 5 wind is called calm and clear wind, level 6 wind is called strong wind, level 7 wind is called squency, level 8 wind is called gale wind, level 9 wind is called gale wind, level 10 wind is called squall, level 11 wind is called storm, and level 12 wind is called hurricane.

Measuring instruments and methods for wind scales:

1. Lightweight anemometer.

A device commonly used in the field to measure the magnitude of the wind, consisting of an induction part and a counter.

The portable anemometer is generally placed in an open place with no tall obstacles around it, and the watch body is vertical. Turn off the switch before observation and write down the number of the pointer. After waiting for a minute or two, turn on the switch and turn on the stopwatch at the same time to record the time.

At this point, the observer quickly leaves the anemometer and stands downwind of the instrument.

Nearly 100 seconds after the instrument was activated, the observer quickly approached the instrument, turned off the switch at plus 100 seconds, and noted the second pointer indication. The difference is calculated from the two readings, which indicates the number of scales taken by the anemometer hand during the observation time, and is recorded in the record sheet.

2. Wind speed and wind vane.

Some lightweight anemometers, in addition to the structural performance of the anemometer mentioned above, are also equipped with a wind vane on the shaft to indicate the wind direction, called a wind speed and wind vane.

3. Wind speed and wind level alarm.

A wind-level wind speed alarm is mainly composed of a single-chip microcomputer, a digital display, an alarm and a wind speed sensor, which can measure the wind speed of 1-12 and quickly display the wind speed at that time.

The level of wind is wind. Wind classification: There are 12 levels.

Wind Scale: Name: Wind Speed (n s) Ground South Image.

0 No wind is quiet, smoke is straight up.

1 Soft wind Smoke indicates the direction of the wind.

2 Light Breeze Feel the wind.

3 Breeze Flag.

4 The wind blows dust.

5 The sedan group is strong and the trees are swaying.

6 Strong winds The wires have sound.

7 Winds Difficulty walking. Closed sensitive orange.

8 Gale Tear down tree branches.

9 Gale Minor damage to the house.

10 The Wind uplifts up the trees.

11 The storm was badly damaged.

12 Hurricanes are greater than destroying enormous.

In 2001, the China Meteorological Administration (CMA) issued the Regulations on Typhoon Operations and Services, which added the wind level from 12 (generally referring to the wind power of a typhoon) to 17

Grade: Wind speed.

13 meters of seconds.

14 levels of meters and seconds.

15 levels of meters and seconds.

16 meters of seconds.

17 levels of meters and seconds.

If there is a high wind of meters and seconds, it is said to be more than 17).

Note: The wind speed listed refers to the wind speed value at 10 meters above the ground on flat ground. If there is a high wind of meters and seconds, it is said to be more than 17).

There are 13 levels of wind strength, with the lowest being 0 and the largest being 12.

Level 0 smoke column soars into the sky; Grade 1 light smoke deviates with the wind; Level 2 breeze blows on Minna's face; Level 3 Leaf Movement Red Flag Exhibition; Level 4 winds blow off pieces of paper; Level 5 small trees swaying in the wind; Level 6 difficulty in lifting an umbrella; Level 7: Inconvenient to walk in the wind; 8. The polar wind blows the branches of the trees; Level 9 roof flying tiles; Level 10: Tree uprooting and house downfall, rare on land.

Historical originsMore than 200 years ago, there were no instruments to measure the magnitude of the wind, and there were no uniform regulations, and each country expressed it according to its own method. At that time, there was a man named Beaufort in England, who carefully observed the situation of various objects on land and sea in winds of different sizes, and accumulated 50 years of experience before dividing the winds into 13 grades in 1805. Later, after research and supplementation, the original description was explained more clearly, disturbing the eggplant and adding the speed of each level of wind, which became the "jargon" for forecasting wind strength.