Structure of tropical cyclone:

i. Tropical cyclones are characterised by large pressure gradients.

ii. The centre of the cyclone is mostly a warm and low-pressure, cloudless core known as eye of the storm.

iii. Generally, the isobars are closely placed to each other showing high-pressure gradients.

iv. Normally, it varies between 14-17mb/100 km, but sometimes it can be as high as 60mb/100km.

v. Expansion of the wind belt is about 10-150 km from the centre.