How is a typhoon formed? Why are there thunderstorms around typhoons?

Typhoon originated in tropical ocean, where the temperature is high and a large amount of seawater is evaporated into the air, forming a low pressure center. With the change of air pressure and the movement of the earth itself, the inflow of air also rotates, forming a counterclockwise air vortex, which is a tropical cyclone. As long as the temperature does not drop, this tropical cyclone will get stronger and stronger, and finally a typhoon will form.

Typhoon transit is often accompanied by strong winds and strong convective weather such as heavy rain or torrential rain. The wind rotates counterclockwise in the northern hemisphere (clockwise in the southern hemisphere). On the weather map, the isobar and isotherm of typhoon are approximately a set of concentric circles. The typhoon center is a low pressure center, which is dominated by the vertical movement of airflow. It was calm and sunny. Near the eye of the typhoon, there is a vortex wind and rain area with heavy wind and rain.