This season is also called North East Monsoon Season. It starts in the middle of September and extends up to middle of December. On September 23rd the direct rays of the sun falls on Equator. Therefore, there is a change in temperature and pressure in the land and water bodies. In this period the Indian sub-continent. The high pressure formed in the northern part of Bay of Bengal results in movement of wind from northeastern part of India towards southwestern region.
These winds blow along the eastern coast of India and Bay of Bengal. In this season due to pressure variation between the Bay of Bengal and main land of India variable winds cyclones take birth in this season and cause great damage in the eastern coast of India. The coastal areas of Tamilnadu, Andhra Pradesh, Odisha and West Bengal come under the frequent effect of cyclones. Some cyclones recorded in the last few years are Bola, Nargis, Nisha, Laila, jal, Neelam etc.
