How are the winds of each series divided?

According to meteorological regulations, when the wind speed is ≥ 17.2m/s, it is called gale. Strong wind is a natural phenomenon and a fast airflow. Gale can be divided into cold wave gale, thunderstorm gale, typhoon and tornado for different reasons.

In the weather forecast, we often hear 2 or 3 or 4 or 5 winds. So how do we identify the level of wind in life? Let the table below help us.

Wind power grade (level)

Fengshen

name

Water surface and ship sign

Land physical evidence image

Equivalent wind speed (m/s)

Calm; calm

The sea is calm.

Quiet, straight.

0~0.2

1

cold-caused ailment

Microwave is like a fish scale, without splash. Ordinary fishing boats feel a little shaky.

Smoke can indicate the wind direction, the leaves are slightly shaking, but the wind vane can't turn.

0.3~ 1.5

2

light breeze

Wavelet, the wavelength is still short, the waveform is remarkable, and the peak is bright but not broken. Fishing boats can move at a speed of 2-3 kilometers per hour with the wind when sailing.

People's faces feel windy, the leaves make a slight noise, the weather vane can turn, and the tall grass begins to shake.

three

gentle breeze

With the increase of wavelet, the peak begins to crack, the tail is bright, and sometimes there are scattered white waves. The fishing boat began to shake and the sail moved at a speed of 5-6 kilometers per hour with the wind.

Leaves and branches are shaking, flags are flying and tall grass is shaking.

3.4~5.4

four

Hefeng

Smaller waves, longer wavelengths, Bai Bo appear in groups. When the fishing boat is full of sails, it can tilt its hull to one side.

It can blow up the dust and paper on the ground, the branches shake and the tall grass fluctuates.

5.5~7.9

five

fresh breeze

The middle wave has obvious long wave shape, forming many white waves, and fishing boats need to shrink some sails.

Small trees with swaying leaves have small waves on the inland water surface, and the tall grass waves fluctuate obviously.

8.0~ 10.7

six

gale

Slight waves began to form, and bigger foam peaks were everywhere. Fishing boats with double sails should pay attention to risks when fishing.

The branches are shaking, the wires are whirring, it is difficult to hold an umbrella, and tall grass falls to the ground from time to time.

10.8~ 13.8

seven

A sudden wind

Slight waves, the foam formed by broken waves is strip-shaped along the wind direction, and the fishing boat no longer leaves the port and anchors in the sea.

The whole tree shakes and the branches bend, making it inconvenient to walk in the wind.

13.9~ 17. 1

eight

Dafeng

The wave is medium and long, and the edge of the peak begins to break into droplets, and the foam is obviously banded along the wind direction. Fishing boats near the port cannot stay out of it.

The twig is broken, and people feel great resistance when they go forward.

17.2~20.7

nine

fierce/wild/violent wind

Wild waves, there are dense strips of foam along the wind direction, and the peaks begin to roll, and water droplets will affect visibility, making it difficult for motorboats to sail.

Straw houses are damaged, roof tiles are torn off, and branches can be broken.

20.8~24.4

10

fierce/wild/violent wind

Wild waves, long and undulating peaks, pieces of foam, white dense strip foam along the wind direction, the sea is bumpy and has a sense of vibration. Visibility is affected, and sailing by motor boat is quite dangerous.

It is rare on land. When you see it, you will uproot trees or seriously damage buildings.

24.5~28.4

1 1

storm wind

Unusually rough waves, the sea surface is completely covered by foam blowing along the wind direction, and the waves are broken into foam everywhere, which affects the visibility and makes motorboats extremely dangerous.

There are few on land, and some general buildings are seriously damaged.

28.5~32.6

12

hurricane

The sea surface turned completely white, and the visibility was seriously affected.

Land is rare, and its destructive power is enormous.

32.7~36.9