Why was it hot before the typhoon?

The hot weather before the typhoon is due to the strong spiral updraft near the typhoon center. After reaching a certain height, it will spread out like the surrounding area. When it reaches the periphery of the typhoon, it will mix with the surrounding air and sink to the lower level. Under the influence of downward flow, it is easy to form high temperature weather. Typhoon (English: Typhoon) is a tropical cyclone. Tropical cyclone is a low-pressure vortex that occurs on the surface of tropical or subtropical ocean, and it is a powerful and profound "tropical weather system". In China, tropical cyclones in the South China Sea and the Northwest Pacific are divided into six grades according to the maximum average wind speed near the center of the bottom layer, and those whose wind reaches 12 or above are collectively called typhoons.

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