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Chennai heavy rain alert on Jan 10 as Bay system intensifies; Delta districts under orange alert

Tamil Nadu weather alert | On January 7th, light to moderate rain is likely at a few places over coastal Tamil Nadu, Puducherry and Karaikal areas. Dry weather is expected over interior Tamil Nadu. Light fog is likely at a few places in interior Tamil Nadu during the early morning hours.

January 10 (Heavy Rain Alert for Chennai): Heavy to very heavy rain is likely in Cuddalore, Villupuram, and Chengalpattu districts and Puducherry.
January 10 (Heavy Rain Alert for Chennai): Heavy to very heavy rain is likely in Cuddalore, Villupuram, and Chengalpattu districts and Puducherry.
| Updated on: Jan 06, 2026 | 04:42 PM
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Chennai: The India Meteorological Department (IMD) has issued a series of weather alerts for Tamil Nadu and Puducherry, forecasting heavy to very heavy rainfall over the next several days as a low-pressure system intensifies over the Bay of Bengal. The Met Department has specifically placed Chennai, Tiruvallur, Kanchipuram, and Chengalpattu under a heavy rain warning for January 10, with an orange alert already in effect for several Delta districts on January 9.

Tamil Nadu weather report: Weather system in BoB intensifying rapidly

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According to the IMD, the upper air cyclonic circulation over the equatorial Indian Ocean has now consolidated into a deep low-pressure area over the southeast Bay of Bengal as of 5:30 AM today. The system is expected to intensify further into a depression within the next 24 hours and continue moving west-northwestward over the southwest Bay of Bengal in the subsequent 48 hours.

This development is likely to significantly activate the Northeast Monsoon over Tamil Nadu's coastal and northern regions.

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Tamil Nadu weather update: Detailed rainfall forecast & District-wise alerts

  • January 7–8: Isolated light to moderate rain expected in coastal areas, with dry weather prevailing in the interior. Morning fog is likely in parts of interior Tamil Nadu.
  • January 9 (Orange Alert): Heavy to very heavy rainfall is forecast in one or two places in Mayiladuthurai, Nagapattinam, Thanjavur, Thiruvarur, and Pudukkottai districts, and Karaikal. Heavy rain is also likely in Ramanathapuram, Sivaganga, Tiruchirappalli, Ariyalur, Cuddalore, Villupuram, and Chengalpattu, and Puducherry.
  • January 10 (Heavy Rain Alert for Chennai): Heavy to very heavy rain is likely in Cuddalore, Villupuram, and Chengalpattu districts and Puducherry. Heavy rain is expected in a wider zone including Mayiladuthurai, Nagapattinam, Thanjavur, Thiruvarur, Ariyalur, Perambalur, Kallakurichi, Tiruvannamalai, Ranipet, Kanchipuram, Tiruvallur, and Chennai districts, and Karaikal.
  • January 11–12: Light to moderate rainfall is expected to continue in many areas, with heavy rain possible in parts of north coastal Tamil Nadu, including Chennai and its neighbouring districts.
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