The first is a trough of low pressure moving generally westward with the trade winds known as the tropical wind. Next is the tropical disturbance, an organized area of ​​thunderstorms that usually forms in the tropics. As a rule, they retain their identity for 24 hours and are accompanied by heavy rain and gusts of wind. Next comes the tropical cyclone, a generic term designating any organized depression developing over tropical and sometimes subtropical waters. Tropical depressions, tropical storms, and hurricanes are all examples of tropical cyclones. Next is the tropical depression, an organized area of ​​low pressure in which sustained winds reach 38 mph or less. Next is the tropical storm, a tropical cyclone with maximum sustained wind speeds ranging from 39 to 73 mph. And finally, a tropical cyclone with sustained winds of at least 120 km/h, known as