During this stage, the thunderstorms become more organized, and the system strengthens rapidly. The minimum surface pressure drops quickly, resulting in the development of gale-force winds.
The circulation center becomes well-defined, and an eye may begin to form. Satellite and radar observations reveal the distinct spiral banding pattern of the system.
The premature stage of a tropical cyclone can cause severe wind and storm surge effects on the coastlines, but the damage is typically limited to a small area.