Tropical storm-the wind near the center is 8 ~ 9, or the gust is 9 and may last.
Strong tropical storm-wind near the center 10 ~ 1 1, or gust 1 1 and may continue.
Typhoon-wind force near the center 12 ~ 13, or gust 13 and may continue.
Strong typhoon-wind force near the center 14 ~ 15, or gust 15 and may continue.
Super typhoon-winds near the center 16 or above, or gusts 17 and may continue.
Extended data:
Typhoon structure:
Typhoon is a deep low-pressure system, and its central air pressure is very low. There is an air flow converging towards the center at the lower level, and the air flow at the upper level mainly diverges outward. If the typhoon is cut horizontally, we can see that there are three obviously different areas, from the center to the outside: typhoon eye area, cloud wall area and spiral rain belt area.
Typhoon Eye Area: It's strange that the wind here is very light and the weather is sunny, with an average diameter of 40 kilometers. The sailors who participated in it humorously called Typhoon Eye "Xanadu".
Cloud wall area: the cloud wall area with a width of tens of kilometers and a height of more than ten kilometers around the typhoon eye, also called eye wall. The cloud wall is towering here, the wind is howling, the rain is pouring, the sea is churning, and the weather is the worst.
Spiral rain belt area: Outside the cloud wall, there are spiral rain belts, and several rain (cloud) belts gather spirally around the eye wall. The rain is tens to hundreds of kilometers wide and several Qian Qian meters long. There will be showers and windy weather where the rain belt passes.
Baidu Encyclopedia-Typhoon
Baidu Encyclopedia-Typhoon Level