Classification of typhoons
Typhoons are classified according to the maximum wind strength near the center of the tropical cyclone. In the past, the Chinese Meteorological Department called winds of magnitude 8 to 11 typhoons, and those of magnitude 12 and above were called strong typhoons. Since January 1, 1989, the internationally unified classification method has been adopted. When the maximum wind force near the center is between level 8 and 9, it is called a tropical storm. When the maximum wind force near the center is between level 10 and level 11, it is called a severe tropical storm. The maximum wind speed near the center is called a severe tropical storm. When the wind force is level 12 or above, it is called a typhoon. For simplicity of description, they are still collectively referred to as typhoons below.
Wind force level table
Wind force level
Signs of land objects on the ground
Approximate wind speed
0
Quiet, the smoke goes straight up.
Less than 1 km/h
0～0.2 m/s
1
Smoke can indicate wind direction.
1-5 kilometers/hour
0.3～1.5 meters/second
2
The human face feels windy , the leaves move slightly.
6～11 kilometers/hour
1.6～3.3 meters/second
3
Leaves and micro-swaying Continuously, the flag is unfurled.
12~19 kilometers/hour
3.4~5.4 meters/second
4
Can blow up dust on the ground and paper, tree branches swaying.
20~28 km/h
5.5~7.9 m/s
5
Small tree with leaves Swinging, small waves on the water inland.
29~38 kilometers/hour
8.0 to 10.7 meters/second
6
The big branches shook and the wires There was a whirring sound and it was difficult to lift the umbrella.
39～49 kilometers/hour
10.8～13.8 meters/second
7
The whole tree is shaking, and it feels like walking in the wind inconvenient.
50～61 kilometers/hour
13.9～17. l meters/second
8
A small branch is broken, and people feel great resistance when moving forward.
62～74 kilometers/hour
17.2～20.7 meters/second
9
The thatched house was damaged, Large branches can be broken.
75~88 kilometers/hour
20.8~24.4 meters/second
10
Trees can be blown down , , General buildings were damaged.
89~102 km/h
24.5~28.4 m/s
11
Rare on land, large Trees can be blown down and buildings can be severely damaged.
103～117 kilometers/hour
28.5～32.6 meters/second
12
Rarely on land, Its destructive power is great.
118～133 kilometers/hour
32.7～36.9 meters/second
13
134～149 kilometers/ Hours
37.0～41.4 meters/second
14
150 to 166 kilometers/hour
41.5～ 46.1 meters/second
15
167～183 kilometers/hour
46.2——50.9 meters/second
16
184～201 kilometers/hour
51.0～56.0 meters/second
17
202～ 220 kilometers/hour
56.1-61.2 meters/second
U.S. Army Joint Typhoon Warning Center (one-minute average wind speed)
Series pressure (millibar mb) miles/hour (knot/hour)
Tropical Depression (TD) -- ＜34
Tropical Storm (TS) -- 34～63
Typhoon (1) >980 64～82
Typhoon (2) 980～965 83～95
Typhoon (3) 965～945 96～113
Typhoon or Super Typhoon (4) 945～920 114～135
Super Typhoon (5) ＜920 ＞135
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TW Central Weather Bureau (ten-minute average wind speed)
TW Central Weather Bureau (ten-minute average wind speed) p>
Beaufort level meters/second (m/s) kilometers/hour (km/hr)
Mild typhoon level 8~11 winds 17.2~32.6 63~117
p>
Moderate typhoon with winds of level 12~15 32.7~50.9 118~183
Strong typhoon with winds of level 16 or above＞51.0＞184
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Hong Kong Observatory (10-minute average wind speed )
Category kilometers per hour (km/hr)
Tropical depression (TD) <62
Tropical storm (TS) 63～87
Severe Tropical Storm (STS) 88～117
Typhoon (TY) ＞118