The Regional Meteorological Centre has maintained its red alert, indicating possibility of isolated extremely heavy rainfall, for various districts in Tamil Nadu on Saturday (November 29, 2025) and two districts on Sunday, as Cyclone Ditwah continues to move over coastal Sri Lanka and the adjoining southwest Bay of Bengal.
Cyclone Ditwah, which brought torrential downpour over Sri Lanka, moved slowly at a speed of 3 kmph over coastal Sri Lanka and southwest Bay of Bengal, about 410 km south-southeast of Puducherry and 510 km south of Chennai, according to a bulletin issued at 6 p.m. on Friday. It is very likely to move across Sri Lanka coast and adjoining Southwest Bay of Bengal and reach over southwest Bay of Bengal near North Tamil Nadu, Puducherry and adjoining south Andhra Pradesh coasts by early Sunday.
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Red weather alert, indicating possibility of rainfall above 21 cm at one or two places, has been issued to four districts — Cuddalore, Mayiladuthurai, Villupuram and Chengalpattu, along with Puducherry on Saturday as the weather system edges closer to TN region. Heavy to very heavy rainfall may lash 14 delta and northern districts, including Chennai, Salem, Thanjavur and Ranipet and six other districts, including Vellore, may get heavy rainfall on Saturday.
