After Northeast Monsoon bids adieu, Chennai rains take a backseat. After witnessing three-digit rainfall in the month of December, rainfall amounts reduced by quite an extent during the month of January. So much so that the average rains in January are a mere 26 mm.
Moreover, rains follow a decreasing trend thereafter wherein the months of February as well as March happen to be the least rainiest months. As far as the month of January is concerned, there have been times when the city of Chennai as well as adjoining parts of Tamil Nadu does not even receive its average rains.
However, this time, rainfall activity is expected to occur over the state of Tamil Nadu during the coming four days or so. In fact, these rains will be seen over the entire state. As far as Chennai is concerned, the city will witness rains on January 9 and 10.
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On January 9 and 10, the entire Tamil Nadu will witness rains. However, rains will be slightly on the higher side as compared to the interior areas.
On January 11 and 12, the rain belt will shrink and the intensity will reduce. During this time, South Tamil Nadu including the coastal regions will see some rains.
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On January 13, rains will be very light over the region while dry weather conditions will take over on January 14.
The Northeast Monsoon has ended but the wind pattern continues to remain the same. Additionally, the ITCZ (Inter Tropical Convergence Zone) during this time, remains closer to the equator but on the southern hemisphere. Sometimes, a replica also extends northwards, this phenomenon is known as the double ITCZ which is the case at present responsible for giving rains over Tamil Nadu.
There are certain disturbances which are embedded in the ITCZ, one of them being a low pressure area in the Bay of Bengal currently moving northwards. Thus, these systems will be responsible for giving rains over the region.
IMAGE CREDIT: culturalindia.net
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