What is the secret behind this Chennai rains
Posted on: 20/May/2016 11:39:53 AM
Normally during the month of May, Chennaites have to suffer from the scorching heat. When people were suffering from the intensity of this summer heat, a sudden miracle had happened. This miracle brought a great relief to the sun borne people. Chennai got sharp showers.
So when people where pondering about these rains, a weather man attributes three factors for these rains. One of them being the land and sea breeze which spark some light showers over the area. Secondly, the wind discontinuity over Peninsular India which is a semi-permanent feature during the Pre-Monsoon season keeps oscillating and is confined to the interiors. It also travels to the coast rarely resulting in some rainfall activity.
Thirdly, the Inter Tropical Convergence Zone (ITCZ) which is a huge band of convective clouds oriented east-west, extending up to 1000 km with a width of about a couple of 100 km. This system in the equatorial region of the Indian Ocean runs close to the southern parts of India and Sri Lanka.
When a well-marked low pressure area forms over the region, the rain spread is more and the system is capable of giving heavy rain over nearby areas. Thus, heavy rains were witnessed in Chennai and its adjoining areas during the month of May when the city remains hot and mostly dry.
