Why the amount of rainfall in India decreases from east to west and which type of cyclones cause rainfall in northwestern India during winter where do they originate?
Rainfall decreases from the east to the west in Northern India because there is a decrease in the moisture content of the winds. Western cyclonic disturbance cause rainfall in north western India during winter. The western cyclonic disturbances which enter the Indian subcontinent from the west and the north-west during the winter months originate over the Mediterranean Sea and are brought into India by the westerly jet stream.