Structure of Tropical Cyclone

The tropical cyclone is a cyclonic windstorm having an organized vortex, formed over the warm sea surface. A cyclone generally occurs in the areas of coordinated wind flow around low-pressure.

The tropical cyclone is a closed atmospheric circulation which consists of lower pressure, warm air supply, cloudiness, heavy rainfall and relatively calm air. Mostly tropical cyclones are circular having large diameter.

Owing to its peninsular shape surrounded by the Bay of Bengal in the east and the Arabian Sea in the west, the tropical cyclones in India also originate in these two important locations.

Though most of the cyclones originate between 10°-15° north latitudes during the monsoon season, yet in case of the Bay of Bengal, cyclones mostly develop during the months of October and November.

Originate between 16°-2° N latitudes and to the west of S2° E. By July the place of origin of these storms shifts to around 18° N latitude and west of 90°E near the Sunderban Delta.