Both typhoons and hurricanes are strong tropical cyclones produced on the surface of tropical oceans.

Typhoons are often accompanied by strong winds and heavy rains. The wind rotates counterclockwise. Isobars and isotherms are approximately a set of concentric circles. The central air pressure is the highest and the temperature is the lowest.

Cyclones in the Asia-Pacific region.

The diameter of air circulation is increasing, even several kilometers. Due to the high-speed rotation of the earth from west to east, there is friction between the airflow column and the surface, and the closer to the equator, the stronger the friction force, which leads to the counterclockwise rotation of the steering airflow column.

The external force is the force of the external environment flow field on the typhoon vortex, that is, the guiding force of the easterly belt of the basic airflow on the south side of the subtropical high in the northern hemisphere. Internal force mainly plays a role in the initial generation of typhoon, while external force is the leading force to manipulate the movement of typhoon, so typhoon basically moves from east to west. Due to the influence of the shape, position and intensity of subtropical high, the typhoon's moving path is not uniform and becomes diverse. Take the typhoon movement path in the western North Pacific as an example, Xiamen is a landing typhoon.

The typhoon moved to the northwest, crossed the Taiwan Province Strait, landed in the coastal areas of Guangdong, Fujian and Zhejiang, and gradually weakened into a low pressure. This typhoon has the greatest impact on China.