"A cyclonic circulation lies over Southeast Bay of Bengal and neighbourhood in lower tropospheric levels. It is very likely to move west-northwestwards towards Tamil Nadu coast during next 4-5 days," said IMD in an official statement.

The weather forecasting agency further informed that a trough runs from the cyclonic circulation Southeast Bay of Bengal and neighbourhood to the Tamil Nadu coast in lower tropospheric levels. IMD has predicted light to moderate scattered/fairly widespread rainfall over Karnataka, Kerala and Mahe and Tamil Nadu, Puducherry and Karaikal during the next 5 days.

IMD further said, "Isolated heavy rainfall very likely over Tamil Nadu, Puducherry and Karaikal during next 5 days and over Kerala and Mahe on November 25 and 26. Isolated very heavy rainfall also very likely over Tamil Nadu, Puducherry and Karaikal on November 25 and 26."