The expression of wind force of 1- 18 in weather forecast.

No wind 2-3, 3-4, 4-5, 5-6, 6-7, 7-8, 8-9, 9- 10,1,12.

What is the wind direction? North wind northeast wind east wind southeast wind southwest wind west wind northwest wind

Description: Wind is represented by wind vector and consists of wind stems and feathers.

Description of wind feather (wind speed): horizontal bar 4m/s, half horizontal bar 2m/s, small flag 20m/s ... The specific level and wind speed correspond to the following contents:

Wind speed (m/s)

0 No wind 0.0-0.2

1 soft wind 0.3- 1.5

2 breeze 1.6-3.3

3 Breeze 3.4-5.4

4 Breeze 5.5-7.9

Level 5 strong breeze 8.0- 10.7

6 strong wind 10.8- 13.8

7 gale 13.9- 17. 1

8 gale 17.2-20.7

Level 9 gale 20.8-24.4

10 gale 24.5-28.4

1 1 Storm 28.5-32.6

12 typhoon above 32.7?

Description of wind direction stalk (wind direction):? Refers to the direction in which the wind blows. Eight directions, professionals also have 16 direction, divided according to 360 direction. The specific division of labor is as follows:

Azimuth symbol center angle/angle range/.

North 0 348.76- 1 1.25

North-northeast 22.5 1 1.26-33.75

Northeast 45 33.76-56.25

Northeast 67.5 56.26-78.75

E 90 78.76- 10 1.25

Southeast ese112.5101.26-123.75

Southeast135123.76-146.25

Southeast Shanghai Stock Exchange157.5146.26-168.75

s 180 168.76- 19 1.25

South by southwest 202.5191.26-213.75

Southwest 225 2 13.76-236.25

West-southwest 247.5 236.26-258.75

W 270 258.76-28 1.25

West-northwest 295.5 28 1.26-303.75

Northwest northwest 3 15 303.76-326.25

North by northwest 337.5 326.26-348.75

The wind speed of static wind C is less than or equal to 0.2m/s.