Many grow into hurricanes - or typhoons if they are west of the International Date Line in the northern Pacific. Tropical storms, hurricanes and typhoons often move out of the tropics to hit places in the middle latitudes. Forms over a tropical ocean. Center of storm is warmer than the surrounding air. Has no fronts.
Strongest winds are near the Earth's surface.
Center of storm is colder than the surrounding air. Strongest winds in the upper atmosphere.