How tropical storms form
Tropical storms form over tropical oceans, usually during late summer or early autumn, requiring heat and moisture to get started. As warm air rises, it cools and condenses, changing from a gas to a liquid and creating an area of low pressure. As the Earth rotates, it creates wind that blows inwards towards the center of this low-pressure area, drawing water up from the ocean. For the system to be officially named a tropical storm, winds must reach up to .