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风力和风速

分类: 气象
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风力是指风吹到物体上所表现出的力量的大小。一般根据风吹到地面或水面的物体上所产生的各种现象，把风力的大小分为18个等级，最小是0级，最大为17级。

风速是风的前进速度。相邻两地间的气压差愈大，空气流动越快，风速越大，风的力量自然也就大。所以通常都是以风力来表示风的大小。风速的单位用每秒多少米或每小时多少公里来表示。而发布天气预报时，大都用的是风力等级。

中国气象局于2001年下发的《台风业务和服务规定》将风力分为0到17级，共18个等级。

风级

名称

风速(米/秒)

风速(公里/小时)

陆地地面物象

海面波浪

浪高(米)

最高(米)

0

无风

0.0-0.2

<1

静，烟直上

平静

0

0

1

软风

0.3-1.5

1-5

烟示风向

微波峰无飞沫

0.1

0.1

2

轻风

1.6-3.3

6-11

感觉有风

小波峰未破碎

0.2

0.3

3

微风

3.4-5.4

12-19

旌旗展开

小波峰顶破裂

0.6

1

4

和风

5.5-7.9

20-28

吹起尘土

小浪白沫波峰

1

1.5

5

清风

8.0-10.7

29-38

小树摇摆

中浪折沫峰群

2

2.5

6

强风

10.8-13.8

39-49

电线有声

大浪白沫离峰

3

4

7

劲风（疾风）

13.9-17.1

50-61

步行困难

破峰白沫成条

4

5.5

8

大风

17.2-20.7

62-74

折毁树枝

浪长高有浪花

5.5

7.5

9

烈风

20.8-24.4

75-88

小损房屋

浪峰倒卷

7

10

10

狂风

24.5-28.4

89-102

拔起树木

海浪翻滚咆哮

9

12.5

11

暴风

28.5-32.6

103-117

损毁重大

波峰全呈飞沫

11.5

16

12

台风（飓风）

>32.6

>117

摧毁极大

海浪滔天

14

-

13


37.0-41.4

134-149





14


41.5-46.1

150-166





15


46.2-50.9

167-183





16


51.0-56.0

184-201





17


56.1-61.2

202-220





17级以上


≥61.3

≥221





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EarthWindMaphttp://earth.nullschool.net/


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