A well developed tropical cyclone has a particular shape. The tropical cyclones vary greatly in size, however all have particular shape and structure.
- A low pressure core around which the tropical cyclone rotates. The low pressure at the center of the tropical cyclone is amongst the lowest that occur on Earth's surface at sea level. For some cyclones the pressure dips below 900 mb, and these are the most devastating tropical cyclones.
- At the center of the cyclones the temperature is greater than the surroundings. A warm core is formed as a result of condensation of the upward rising moist air, that releases latent heat of condensation.
- All cyclones have a Central Dense Overcast (CDO). A CDO is a dense shield that contains the eye and the eyewall of the tropical cyclone. The classic tropical cyclone contains a symmetrical CDO, i.e. it is perfectly circular and round on all sides. This is the zone where maximum activity occurs.
- An eye of the cyclone is most remarkable and characteristic feature of all tropical cyclone. It is the area of sinking air at the center of circulation. The eye is characterized by clear skies and calm weather. It is circular in shape and in size ranges from 8 - 200 km.
- The eyewall is the band around the eye with maximum wind speed, heaviest rainfall and greatest height. It is responsible for the maximum damage caused by a cyclone.
- At the upper level of tropical cyclone winds move away from the center resulting in anticyclonic rotation.
- In a tropical cyclone, the rainbands are oriented in the same direction as the horizontal winds and it seems to spiral into the center of the tropical cyclone. These bands are known as spiral bands.