The isobars are generally circular, and close to each other resulting into steep pressure gradient.
They may be a thousand kilometers in diameter and about 15km in height.
The central area is designated as an ‘eye’ of cyclone. The eye of cyclone is surrounded by clouds so high and dense that the day time sky above looks dark. The central part of the tropical cyclone has clear sky in which the air descends from the above.
They do not have fronts.
They derive their energy from the latent heat.
The clouds in the cyclone are cumulonimbus having vertical extension up to about 12-15km.
They give torrential rainfall.
Majority of tropical cyclones decay when they come over the land or when they recurve northward over oceans.