(a) The part of South-West monsoons which blows over Arabian sea is responsible for high rainfall on the Western coast and Northern plains of India.
These winds enter through Saurashtra and enter Northern plains. These winds strike the Himalayas and , give fairly good rainfall as they have abundant moisture.
(b) South-West monsooi? winds are perpendicular to the direction of Western Ghats. Thus, they give heavy rainfall on the windward side of the Western Ghats. Central Peninsula lies on the leeward side of the Western Ghats. Thus, the Arabian Sea branch of South-West monsoon does not reach this region.