What is the speed of the wind speed class?

Question 1: How many grades is the wind speed? Wind speed has a grade only if there is no grade, and wind speed is the basis of wind speed classification. Generally speaking, the greater the wind speed, the higher the wind level and the more destructive the wind is.

Meteorology, at present, it is generally divided into 12 grades according to the magnitude of wind: 0 grade wind is also called windless. Level 2 wind is called breeze, the leaves are slightly noisy, and people feel windy. Level 4 wind is called breeze, and the twigs of trees shake, which can blow up dust and paper on the ground. The 6-level wind is called strong wind, the branches are shaking, the wires are whistling, and it is difficult to walk with an umbrella. The 8-level wind is called strong wind, the twigs of trees can be broken, and people walk against the wind with great resistance. 10 wind is called gale, which is rare on land. Trees can be pulled up and buildings are seriously damaged. /kloc-winds above 0/2 are called hurricanes, which have great destructive power and are rare on land. In fact, in nature, the wind sometimes exceeds 12.

Question 2: How is the wind speed rated? 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 18, with the smallest being 0 and the largest being 17.

Wind speed is the forward speed of the wind. The greater the air pressure difference between two adjacent places, the faster the air flow, the greater the wind speed and the greater the wind force. Therefore, the magnitude of wind is usually expressed by wind power. The unit of wind speed is meters per second or kilometers per hour. When releasing the weather forecast, most of them use the wind level.

Question 3: What is the speed of each wind? Classification of wind power

Wind has both magnitude and direction, so the wind forecast includes wind speed and direction. The magnitude of wind speed is often expressed by several winds. The level of wind is determined according to the degree of influence of wind on ground objects. In meteorology, at present, it is generally divided into twelve grades according to the magnitude of wind power:

In the weather forecast, we often hear the expression "the north wind is 4 to 5", in which the wind refers to the average wind; If you hear the phrase "gust 7", gust refers to the wind with high and low speed, and the wind at this time refers to the high-speed wind.

Represented by wind vector, it consists of wind stems and wind plumes.

Wind handle: indicates the direction of the wind, with 8 directions.

Wind feather: 3 or 4 short strokes and triangles indicate strong wind, perpendicular to the right side of the wind pole (northern hemisphere).

wind scale

Wind speed (m/s) Sea surface wave height of land objects (m)

0 No wind, 0.0-0.2 smoke, straight up, calm, 0.0

1 soft wind 0.3- 1.5 smoke indicates that the wind direction is at the peak of microwave 0. 1 and there is no water drop.

2 breeze 1.6-3.3 Feel the wind, and the small wave crest will not be broken by 0.2.

3 breeze 3.4-5.4 standard propagation wavelet peak rupture 0.6

4 breeze 5.5-7.9 blows dust, small waves, foam peak 1.0.

5 Strong breeze 8.0- 10.7 Waves and foam peaks in swaying young trees 2.0

6 strong wind 10.8- 13.8 wire sound waves to water droplets 3.0

7 gale 13.9- 17. 1 difficulty in walking, peak breaking, foam strips 4.0

8 strong wind 17.2-20.7 damaged branches, wave 5.5.

9-level gale 20.8-24.4 Small damaged houses wave crest rollback 7.0

10 gale 24.5-28.4 uprooting trees, waves rolling and roaring 9.0

1 1 Storm 28.5-32.6 was generally damaged, and the peaks were all in water droplets 1 1.5.

12 hurricane 32.7- destructive wave +04.0

* * Note: The wind speed listed in this table refers to the wind speed value at10m above the flat ground.

Song of wind speed

Zero wind, straight smoke; The first wind, the smoke is slightly biased towards the second wind, and the leaves are crisp; The third wind, the flag fluttering; Four winds, dust, five winds and waves; Six winds, big trees shake; Seven winds, unable to move; Eight winds, broken branches; Grade 9 wind, smoke and halogen collapse; Ten winds, uprooted; Xi. Scarcity of land; Twelfth grade, less; The wind roared and the waves were huge.

Wind songs

The 0-level smoke column soared into the sky, and the 1 level smoke deviated with the wind.

Level 2 breeze blows the surface, level 3 leaves move the red flag exhibition,

Four-level small trees shake with leaves, and five-level branches shake paper.

It is difficult to walk with an umbrella at level 6 and inconvenient to walk against the wind at level 7.

Grade 8 wind breaks branches, grade 9 roof tiles fly,

The 10 tree fell from the ground, and 1 1. 12 is rare on land.

Question 4: What is the wind speed? There are three levels of wind speed: no wind, light wind and strong wind.

Question 5: How does the grade of wind speed distinguish the classification of wind?

According to the phenomenon caused by the wind to the ground objects, the wind force is divided into 13 grades, which are called wind grades, and recorded by numbers of 0 ~ 12 grades.

wind scale

Wind grade and symbol name Wind speed (m) * Sea surface wave height of land image (m)

0 No wind, 0.0-0.2 smoke, straight up, calm, 0.0

1 soft wind 0.3- 1.5 smoke indicates that the wind direction is at the peak of microwave 0. 1 and there is no water drop.

2 breeze 1.6-3.3 Feel the wind, and the small wave crest will not be broken by 0.2.

3 breeze 3.4-5.4 standard propagation wavelet peak rupture 0.6

4 breeze 5.5-7.9 blows dust, small waves, foam peak 1.0.

5 Strong breeze 8.0- 10.7 Waves and foam peaks in swaying young trees 2.0

6 strong wind 10.8- 13.8 wire sound waves to water droplets 3.0

7 gale 13.9- 17. 1 difficulty in walking, peak breaking, foam strips 4.0

8 strong wind 17.2-20.7 damaged branches, wave 5.5.

9-level gale 20.8-24.4 Small damaged houses wave crest rollback 7.0

10 gale 24.5-28.4 uprooting trees, waves rolling and roaring 9.0

1 1 Storm 28.5-32.6 was generally damaged, and the peaks were all in water droplets 1 1.5.

12 typhoon 32.7- destructive waves +04.0

Note: The wind speed listed in this table refers to the wind speed value at10m above the flat ground.

Question 6: What are the corresponding wind speeds of several winds in the weather forecast?

Question 7: What is the highest wind speed level?

wind scale

Signs of surface objects

Equivalent wind speed

Kilometer/hour

M/s

Quiet, straight.

Less than 1

0~ 0.2

1

Smoke can indicate the wind direction.

1-5

0.3~ 1.5

2

The face feels windy and the leaves move slightly.

6~ 1 1

1.6~3.3

three

Leaves and micro-technology are shaking and flags are flying.

12~ 19

3.4~5.4

four

It can blow up dust and paper on the ground, and the branches of trees will shake with it.

20~28

5.5~7.9

five

Small trees with swaying leaves make small waves on the inland water surface.

29~38

8.0 I 10.7

six

The branches are shaking, the wires are whirring, and it is difficult to lift the umbrella.

39~49

10.8~ 13.8

seven

The whole tree is shaking, so it is inconvenient to walk in the wind.

50~6 1

13.9~ 17.l

eight

When twigs break, people will feel great resistance to progress.

62~74

17.2~20.7

nine

The straw house is damaged and the branches can be broken.

75~88

20.8~24.4

10

Trees can be blown down and general buildings are damaged.

89~ 102

24.5~28.4

1 1

Rare on land, trees can be blown down, and general buildings are seriously damaged.

103~ 1 17

28.5~32.6

12

There is little land and great destructive power.

1 18~ 133

32.7~36.9

13

134~ 149

37.0~4 1.4

14

150- 166

4 1.5~46. 1

15

167~ 183

46.2――50.9

16

184~20 1

5 1.0~56.0

17

202~220

56. 1――6 1.2

What you said is equivalent to 2 1 wind.

Secondary maximum 1 1

Level 3 upper limit 19

The highest level 4. 28

Up to level 5. 38

The highest level is 6. forty-nine

After analogy

What you said is equivalent to a gust of wind 2 1! !