Wind grade representation

Wind direction and wind direction are represented by wind vanes on the weather map. Weather maps are divided into ground maps and high-altitude maps. Generally speaking, our daily wind is the wind on the ground map.

Wind direction: expressed by vector pole, that is, F in LZ, indicating the direction of wind. The direction of the wind direction is based on the longitude and latitude lines on the map. In other words, if LZ gets a weather map, let the latitude be horizontal, up north and down south. Then observe the wind vane, and the vertical direction of F points to the direction of wind blowing. There is an F in this picture, which means the north wind, and the head (the side with bars) of F points to the north (that is, the top), which means the wind blows from the north, that is, the north wind blows to the south.

Wind speed: indicated by sagittal feathers. It's a bar on F, and the bar is long or short. The long stroke means 4m/s, the short stroke means 2m/s ... The small pennant means 20m per second.

The above is someone else's answer on Baidu, just saying what the wind speed is.

The following is a comparison of wind speed and wind level.

The number in the title is the wind level, and the first of the last two numbers is kilometers per hour.

The second is meters per second.

breathless

& lt 1

0-0.2

silent

silent

1

gentle breeze

1-5

0.3- 1.5

Smoke can point the way, but the weather vane does not move.

microwave

2

Breeze breeze

6- 1 1

1.6-3.3

The face feels windy and the vane turns.

small wave

three

A gentle breeze

12- 19

3.4-5.4

Leaves and branches are shaking and flags are flying.

small wave

four

Breeze and breeze

20-28

5.5-7.9

It can blow up paper and dust on the ground.

fine

five

A fresh breeze

29-38

8.0- 10.7

Small trees with swaying leaves.

moderate sea

six

strong breeze

39-49

10.8- 13.8

The branches shook and the wires whizzed.

High wave

seven

Moderate gale

50-6 1

13.9- 17. 1

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

turbulent

eight

gale

62-74

17.2-20.7

When the twig is broken, people have great resistance to advance.

open sea

nine

strong breeze

75-88

20.8-24.4

The building was hardly damaged.

Surging waves-great momentum

10

The whole gale gale

89- 102

24.5-28.4

Trees will be uprooted and buildings will be damaged.

Surging waves-great momentum

1 1

Storm storm

103- 1 17

28.5-32.6

It is rare on land, and there will be extensive damage.

Surging waves-great momentum

12

Hurricane hurricane

& gt 1 17

32.7-36.9

Rarely seen on land, it is extremely destructive.

The waves are monstrous.