Bay of Bengal Vortex Triggers 120-Hour Rain Fury, IMD Warns Southern States

• IMD issues heavy rainfall alert for 5 days (120 hours) due to a cyclonic circulation in the Bay of Bengal.
• Tamil Nadu, Puducherry, and Karaikal are expected to experience intermittent light to heavy rains.
• A low-level atmospheric trough and upper-air cyclonic circulation are contributing to the weather disturbance.
• Past rains caused waterlogging, crop damage, traffic jams; night temperatures may drop by 2-4°C till Jan 7.
• Fishermen advised to avoid the sea; the heavy rainfall alert is valid till January 9.

Why It Matters: IMD warns of 5-day heavy rain in Southern India due to Bay of Bengal cyclonic circulation.