Question

Give an account of weather conditions and characteristics of the Retreating Monsoon.

Answer 1

Hint:The south-west monsoon starts retreating from northern India in early October. Hence, the months of October and November are known for the retreating monsoon.Retreating Monsoon rainfall in some places is as heavy as the summer monsoon Interior parts of Deccan mainly dry because they lie in the rain shadow of the Eastern Ghats.

Complete answer:
The reason for this retreat is that the monsoon trough of low pressure over the Ganga plains becomes weaker due to the apparent movement of the sun Southward. The low pressure trough is gradually replaced by high pressure. The retreat of the monsoon is marked by clear skies and drop in night temperature. The land remains moist. The combination of high temperature and humidity gives rise to oppressive weather. Thun is commonly known as October heat'. Day temperature rises due to clear skies.
The low pressure conditions are transferred to the centre of Bay of Bengal by early November This shift of the low pressure area is marked by cyclonic depressions which originate over the Andaman Sea. Some of the cyclonic depressions result in heavy and widespread rains on the coast of Tamil Nadu and parts of Odisha. These cyclonic storms move from the north-east to the south-west The retreating monsoons are generally dry except in the coastal areas of Tamil Nadu. Odisha and parts of Karnataka.

Note:There are tropical depressions (low pressure system) originating in the Bay of Bengal caused by local variations of heat and moisture. They lead to tropical cyclones in November and December. Such cyclones generally originate in the neighbourhood of the Andaman Islands and travel west or northwest over the Bay of Bengal. Whenever they occur, they cause great loss of life and property due to heavy rain in the eastern coastal regions of India.