Weather today: Cyclone Ditwah to bring more rainfall in Chennai, Andhra Pradesh? Here's what IMD said in its latest bulletin

Cyclone Ditwah weakened into a deep depression and the weather system would be centred over the southwest Bay of Bengal within a minimum distance of 20 km from the coasts of North Tamil Nadu and Puducherry by the morning of Monday (December 1, 2025), the Regional Meteorological Centre said. More than 300 people have been killed in Sri Lanka as cyclone Ditwah left behind a trail of destruction in the island nation, according to the Disaster Management Centre’s latest update. Over 300 people are reported missing.

Tamil Nadu has been receiving heavy rainfall triggered by cyclone Ditwah and three people have died in rain-related incidents, reported news agency PTI. The cyclone is also expected to significantly intensify rainfall across Andhra Pradesh, according to the Indian Meteorological Department. The National Disaster Response Forces has been deployed in Nellore as a precautionary measure.

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Where is cyclone Ditwah?

"The Deep Depression (Remnant of Cyclonic Storm Ditwah) over southwest Bay of Bengal and adjoining north Tamil Nadu-Puducherry coasts moved northwards with the speed of 10 kmph during past 6 hours and lay centered at 2330 hrs IST of yesterday, the 30th November 2025 over the same region, near latitude 12.3°N and longitude 80.6°E, about 90 km south-southeast of Chennai (India), 90 km east-southeast of Puducherry (India), 110 km east-northeast of Cuddalore (India), 180 km north-northeast of Karaikal (India)," the IMD said in its latest weather bulletin on December 1.

The minimum distance of the centre of the deep depression from north Tamil Nadu-Puducherry coasts is about 50 km, the weather department added. "It is very likely to move nearly northwards parallel to North Tamil Nadu-Puducherry coasts and weaken gradually further into a depression by noon of today, the 01st December. The system will be centered over southwest Bay of Bengal within a minimum distance of 30 km by morning of today, the 01st December," the IMD further stated.

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Cyclone Ditwah: Heavy rainfall alert in Tamil Nadu

The RMC Chennai has predicted light to moderate rain at a few places over Tamilnadu (at many places over North Tamilnadu and at isolated places over South
Tamilnadu) and over Puducherry & Karaikal area with thunderstorm and lightning at one or two places. Heavy to very heavy rain is likely to occur at a few places over Tiruvallur, Ranipet Kancheepuram, Chennai, Chengalpattu and Vellore districts. Heavy rain is likely to occur at isolated places over Tirupattur,
Tiruvannamalai, Villuppuram districts and Puducherry, it added.

"Heavy to very heavy rainfall at some places with isolated extremely heavy rainfall over Tamil Nadu," the IMD said. Sea condition is likely to be high and it is very likely to improve gradually becoming very rough to rough, by morning of December 1 and gradually improve thereafter, the bulletin said.

Fishermen are advised not to venture into the sea and those out at sea should avoid southwest Bay of Bengal, Gulf of Mannar, Comorin area and along and off Tamil Nadu, Puducherry, south Andhra Pradesh till December 1, it said.

ALSO READ: Cyclone Ditwah tracker: Where is cyclone Ditwah and when will it make landfall? IMD warns of heavy rain in Andhra, Tamil Nadu and other states

Cyclone Ditwah brings heavy rain in Andhra

Moderate to heavy rains and strong winds were witnessed in parts of Nellore and Tirupati districts on Sunday as the cyclone Ditwah over the Bay of Bengal inched closer towards the eastern coastal regions of India. The AP govt has set up control rooms in the vulnerable districts to monitor and manage the situation arising from the cyclone, which may trigger heavy rainfall on Monday. Normal life was hit on Sunday as heavy rains lashed parts of the state, particularly Tirupati and Nellore districts.

Meanwhile, the IMD has warned that rainfall is likely to increase in some parts of Rayalaseema region and Prakasam and Nellore districts in south coastal Andhra, reports TOI. According to IMD, Tirupati, Kadapa and Annamayya districts in Rayalaseema, and Bapatla district in south coastal Andhra may receive heavy to very heavy rainfall, while districts like Chittoor, Sri Sathya Sai, Anantapur and Nandyal in Rayalaseema, and Palnadu, Guntur, Krishna, West Godavari and Konaseema in coastal Andhra are likely to get isolated heavy rainfall.

Local authorities have issued SMS alerts to residents in low-lying zones, urging them to take necessary precautions. People in vulnerable areas have been advised to remain vigilant, as parts of Guntur, Prakasam, Nellore, Chittoor, Tirupati, Annamayya and Kadapa districts face a heightened risk of flash floods.

(With inputs from TOI and agencies)