How tropical cyclones start

Clusters of thunderstorms grow and spin as warm air rises, cools, and condenses, releasing heat. This intensifies the low-pressure area, drawing more air toward the storm's centre. Cumulonimbus clouds form, and cooler air sinks, creating the eye. Tropical cyclones gain energy from warm ocean moisture. Tropical cyclones form May-November in the Northern Hemisphere (spin clockwise) and November-May in the Southern Hemisphere (spin counterclockwise).