The Line Meaning of Four Colors in Typhoon Track Real-time Release System

Different lines in the typhoon track map indicate the forecast paths of several weather stations, and the weather stations of each forecast path are marked with different colors.

In China, tropical cyclones in the South China Sea and the Northwest Pacific are classified into six grades according to the maximum average wind force near the bottom center, in which the wind force is 12 or above, which is collectively called "typhoon".

Typhoon can be divided into general typhoon (maximum wind 12 ~ 13), strong typhoon (maximum wind 14 ~ 15) and super typhoon (maximum wind ≥ 16). 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. The structure of typhoon is divided into typhoon eye area, cloud wall area and spiral rain belt area from center to outside.

Structure of typhoon:

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.