BB-10, now as a depression is currently at 10N and 84E, with a core pressure of 1002 mb.
As the system is just South of the favourable ridge (mentioned earlier), it will track West, and due to adjacent wind shear at 20 knts, it will deepen more, and develop a stronger wind force in the Northern semi circle. This semi circle will have winds upto 30 knts, and Chennai will get gusty NE winds of the same speed from Sunday night itself.
BB-10 will move into central coastal TN around Monday night, with centre at Nagapattinum/Karaikal. Heavy falls in Puddukotai and Thanjavur districts. But, rainfall will be increasing throughout the TN regions from Sunday evening, with heavier falls in the Northern coastal regions.
After crossing land, the system weakens.
See Chart and details in vagaries
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