(i) During winter, a high pressure area develops north of the Himalayas.
(ii) Cold dry winds blow from this region to the iow pressure areas over the
oceans to the south.
(iii) In summer, a low pressure area develops over interior Asia as well as
over northwestern India.
(iv) This causes a complete reversal of the direction of winds during
summer.
(v) Air moves from the high pressure area over the southern Indian ocean
in a south-westerly direction, crosses the equator and turns right towards
the low Pressure area over the Indian sub-continent.
(vi) These winds are known as south-west monsoon winds.
(vii) These winds blow over the warm oceans, gather moisture and bling
widespread rainfall over the mainland of India.