Wind speed refers to the rate of movement of air relative to a fixed place on the earth. The common unit is m / s, 1m / s = 3.6 km / h. Wind speed has no grade, and wind has grade. Wind speed is the basis for dividing wind grade. Generally speaking, the higher the wind speed, the higher the wind level, and the more destructive the wind is. Wind speed is one of the main parameters of climatological research. The measurement of atmospheric wind is of great significance and significance for global climate change research, space industry, and military applications. [1]
Wind rating | The name of the wind | Wind speed (m / s) | Wind speed (Km / h) | Coast fishing boat symbol | Land conditions | Surface conditions |
0 | No wind | 0 ~ 0.2 | less than 1 | Quiet | Quiet, smoke straight up | Calm |
1 | light air | 0.3 ~ 1.5 | 1 ~ 5 | The ordinary fishing boat shakes slightly | Smoke can indicate the wind direction, but the vane cannot turn | Weilang |
2 | Breeze | 1.6 ~ 3.3 | 6 ~ 11 | When the fishing boat is sailing, it can move with the wind 2 ~ 3km per hour | The human face feels windy, the leaves are rattling, and the wind vane can turn | Xiaolang |
3 | breeze | 3.4 ~ 5.4 | 12 ~ 19 | The fishing boat gradually shakes and can move with the wind 5 ~ 6km per hour | Leaves and twigs sway, flags unfold | Xiaolang |
4 | Zephyr | 5.5 ~ 7.9 | 20 ~ 28 | When the fishing boat is full, | Can blow up ground dust and paper, the twigs of the tree move slightly | Light waves |
5 | Fresh wind | 8.0 ~ 10.7 | 29 ~ 38 | Retracting the fishing boat (that is, taking away one of the sails) | Leafy twigs sway, wavelets in inland water | Zhonglang |
6 | Gale | 10.8 ~ 13.8 | 39 ~ 49 | Fishing boat doubles down, fishing needs risk | Big branches sway, wires whisper, and parachuting is difficult | Big wave |
7 | blast | 13.9 ~ 17.1 | 50 ~ 61 | Fishing boats rest in port and anchor at sea | The whole tree shakes and it is inconvenient to walk in the wind | Giant wave |
8 | Gale | 17.2 ~ 20.7 | 62 ~ 74 | Incoming fishing boats cannot stay out | The branches are broken, and people feel great resistance to moving forward | Raging waves |
9 | Gale | 20.8 ~ 24.4 | 75 ~ 88 | Difficulty sailing on a steamboat | Building is damaged (chimney and roof tiles move) | Stormy |
10 | Squall | 24.5 ~ 28.4 | 89 ~ 102 | Steamboat sailing is dangerous | It is rare on land, and it can cause trees to be damaged when seen. | Stormy |
11 | storm | 28.5 ~ 32.6 | 103 ~ 117 | Steamboat is extremely dangerous | Few on land, some must be severely damaged | Extraordinary phenomenon |
12 | hurricane | 32.7 ~ 36.9 | 118 ~ 133 | Sky-high waves | Very few on land, great destructive power | Extraordinary phenomenon |
13 | hurricane | 37.0 ~ 41.4 | 134 ~ 149 | - | Very few on land, great destructive power | Extraordinary phenomenon |
14 | hurricane | 41.5 ~ 46.1 | 150 ~ 166 | - | Very few on land, great destructive power | Extraordinary phenomenon |
15 | hurricane | 46.2 ~ 50.9 | 167 ~ 183 | - | Very few on land, great destructive power | Extraordinary phenomenon |
16 | hurricane | 51.0 ~ 56.0 | 184 ~ 201 | - | Very few on land, great destructive power | Extraordinary phenomenon |
17 | hurricane | 56.1`61.2 | 202 ~ 220 | - | Very few on land, great destructive power | Extraordinary phenomenon |
