A low-pressure area developed over the southwest region of the Bay of Bengal, near Sri Lanka’s coast. This is expected to result in heavy rainfall in several areas of Tamil Nadu.
The Regional Meteorological Centre therefore issued an orange alert in four districts of the state, including Tiruvarur, Nagapattinam and Karaikal, warning of a rainfall of 12 to 20 cm on Sunday. Several other districts, including Sivagangai and Ramanathapuram, are also expected to receive heavy rain as the low pressure develops over the sea.
The Indian Meteorological Department predicted light rains along with thunderstorms in Tamil Nadu from 17 November, with lightning in several parts of Karaikal, Tamil Nadu, and Puducherry. The IMD listed several other districts where heavy rain can be expected. These include Chennai, Kancheepuram, Tiruvallur, Chengalpattu, Kallakurichi, Villupram, Cuddalore, Nagapattinam, Mayiladutharai, and Thanjavur.
The latest observation by the Indian Meteorological Department showed that the low-pressure area above the coast of Sri Lanka has stayed stationary as recorded at 5:30 am on 16 November. Officials further confirmed that a cyclonic upper-air circulation of 5.8 km above mean sea level exists and is tilted southwestward after gaining height. This system is expected to move towards the west-northwest direction in the next 24 hours, as per the IMD.
An upper air cyclonic circulation also persists over South Bangladesh and areas around it, measuring 1.5 km above the sea level. A cyclonic circulation is also active over the Southeast Arabian Sea and the South Kerala coast, 0.9 km above mean sea level. The upper-air circulation has evolved into a low-pressure area over the Southwest Bay of Bengal, reinvigorating the Northeast monsoon and now finally bringing the latest lull to an end.
