North of the Himalayas is the Tibetan Plateau. It is called “the roof of the world”. However, the Tibetan Plateau is very dry because the plateau and the mountains act as a gigantic rain shadow. The rain falls instead on the south side of the mountains. This has greatly influenced the climate of the Indian subcontinent. Not only does it block the extremely cold winter winds blowing from Central Asia from entering Subcontinent, it also forces the Bay of Bengal Monsoon branch to shed its moisture along NE and Northern Indian States, Bhutan, Nepal and Bangladesh.