A strong upward movement of air draws water vapour up from the surface of a warm ocean
this evaporated air cools as it rises and condenses to form a towering thunderstorm clouds
As the air condenses it releases heat which powers the storm and draws up more and more water from the ocean
several smaller thunderstorms join together to form s giant spinning storm. when the surface winds reach an average of 120km per hour(75 miles per hour) it is officially a tropical storm
the storm now develops an eye at its centre where air descends rapidly. The outer edge of the eye is the eyeball share the most intense weather conditions are.
as the storm is carried across the ocean by prevailing winds it gathers strength
on reaching land the storms energy supply(the water)is cut off.friction with land also slows and weakens it .