Height = 15 km for both hurricane and tstorm. Diameter = 150 -300 km for hurricanes (compared to 15 km for t storms) Hurricanes and typhoons are tropical cyclones, with surface winds turning ocunterclockwise and spiraling in. Eye = center of hurricane: relatively clear, relatively calm, low pressure at sea level. Hurricanes are made of thunderstomrs: eyewall = ring of thunderstorms around the eye, spiral bands = bands of t storms extending out from the eye wall. Tropical cyclones organized to create their own fuel. Compare with individual thunderstomrs: use the warm, humid boundary-layer air as fuel, consume nearby supplies of fuel, run out of fuel and die, are short lived (15-30 min) They manipulate the environment to continually create new fuel from heat stored in the ocean. Low pressure in eye sucks in boundary-layer (bl) air (air in the bottom 1 km of the atmosphere) As air gets closer to eye, it moves faster.