Difference between rainfall in north west part of india and south west part of india
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Winter rainfall or off-monsoon rainfall has two main components. In south, it is called as North east monsoon and in the North west it is called Western Disturbances.
North east monsoon starts in mid-October causing by reversal of trade winds. Trade winds blow from the Siberian high while passing over North Bay of Bengal, picks up moisture and dumps as rainfall over the southern states like Tamil Nadu, Kerala, Andhra Pradesh and Karnataka. Due to the disturbed weather activity over Bay of Bengal, low pressure systems generate and develop in to cyclones which gives most of the rainfall.
However in North west India, post monsoon, dry weather settles down predominantly. At times, low pressure systems form over Mediterranean sea in the west which traverse east. When these weather systems pass over North west India it precipitates as winter rainfall. Western slopes of Himalayas gets most of the rainfall out of this.
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North east monsoon starts in mid-October causing by reversal of trade winds. Trade winds blow from the Siberian high while passing over North Bay of Bengal, picks up moisture and dumps as rainfall over the southern states like Tamil Nadu, Kerala, Andhra Pradesh and Karnataka. Due to the disturbed weather activity over Bay of Bengal, low pressure systems generate and develop in to cyclones which gives most of the rainfall.
However in North west India, post monsoon, dry weather settles down predominantly. At times, low pressure systems form over Mediterranean sea in the west which traverse east. When these weather systems pass over North west India it precipitates as winter rainfall. Western slopes of Himalayas gets most of the rainfall out of this.
Hope this helps
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