The Western region is a region which has been the source of the wind from the west monsoon wind. South Bay of Bengal came to blows from the mountain before the clash onma. Rainfall is higher than in the destination wind.
In the western part of the area from the wind. Which is influenced by the southwest monsoon winds blowing from the Bay of Bengal hit the mountain before. To get higher rainfall in the wind.
The section west of the region is the wind, which was influenced by the wind, monsoon, West, southwest winds from the bay of Bengal against the mountain. Make up water content was higher than that in the wind.