A well-marked low-pressure area brewing over the Bay of Bengal has gained momentum and is expected to bring heavy to very heavy rainfall to Tamil Nadu over the next five days. The India Meteorological Department (IMD) has issued orange and yellow alerts for several districts, forecasting intense rains from today onwards.
According to the weather office, the low-pressure system, initially formed over the East Equatorial Indian Ocean and adjoining Southeast Bay of Bengal, has moved west-northwestward, becoming a well-marked low-pressure area over the southeastern Bay of Bengal. This system is likely to intensify further into a depression over the central parts of the south Bay of Bengal by Monday.
As the system moves northwestward toward the Tamil Nadu and Sri Lanka coasts in the coming days, it is expected to bring heavy rains across the state. The weather department has specifically warned of very heavy rainfall in the Cauvery delta districts, including Mayiladuthurai, Thanjavur, Tiruvarur, and Nagapattinam, for the next three days. Additionally, heavy rainfall is expected in the northern coastal districts, including Chennai and its neighbouring districts of Tiruvallur, Kancheepuram, and Chengalpattu.
The IMD has issued yellow alerts for Chennai and its surrounding areas, including Tiruvallur, Kancheepuram, and Chengalpattu, from November 27 to 29. Villupuram, Cuddalore, and the delta regions are also on high alert due to the impending downpour.
The IMD has advised authorities to be prepared for potential disruptions due to heavy rains, particularly in low-lying areas and districts prone to flooding. Farmers, fishermen, and the general public are urged to exercise caution and stay updated on weather alerts. Coastal areas are also advised to be vigilant, as strong winds and rough seas are expected in the coming days.
This weather system is likely to continue influencing Tamil Nadu’s weather until the end of the week, with the potential for localized flooding in the affected areas. The IMD continues to monitor the system’s progress closely and will provide further update
Heavy rain is also likely to occur at isolated places over Ramanathapuram, Sivaganga, Pudukkottai, Ariyalur, Cuddalore and Villupuram districts and Puducherry tomorrow.
On November 26, Heavy to very heavy rain is likely to occur at isolated places over Thanjavur, Cuddalore, Tiruvarur, Nagapattinam, Mayiladuthurai and Pudukkottai districts and Karaikal area.
Heavy rain is also likely to occur at isolated places over Villupuram, Chengalpattu, Kancheepuram, Ramanathapuram, Sivaganga, Ariyalur, Perambalur, Tiruchirappalli and Kallakurichi districts and Puducherry.
On Wednesday, Heavy to very heavy rain is likely to occur at isolated places over Cuddalore, Villupuram, Mayiladuthurai, Tiruvarur and Nagapattinam districts of Tamil Nadu and Puducherry and Karaikal area.
Heavy rain will also occur at isolated places over Thanjavur, Ariyalur, Perambalur, Kallakurichi, Tiruvannamalai, Ranipet, Tiruvallur, Kancheepuram, Chengalpattu and Chennai districts, the same day.
On November 28, Heavy rain is likely to occur at isolated places over Tiruvallur, Chennai, Kancheepuram, Chengalpattu, Villupuram, Cuddalore, Mayiladuthurai, Nagapattinam, Tiruvarur and Thanjavur districts, Puducherry and Karaikal area, while Heavy rain is likely to occur at isolated places over Chennai, Tiruvallur, Kancheepuram and Chengalpattu districts on Friday (November 29).
In view of likely formation of Depression over central parts of South Bay of Bengal, fishermen are advised not to go for deep sea fishing were advised to follow further updates.
Squally weather with wind speed 35 kmph to 45 kmph and gusting to 55 kmph is likely to prevail over South Tamilnadu coast, adjoining Comorin area and Gulf of Mannar, tomorrow.
The next day on Tuesday, squally weather with wind speed 50 kmph to 60 kmph and gusting to 70 kmph is likely to prevail over Tamil Nadu coast, Comorin area and Gulf of Mannar.
Rough to very Rough Sea condition is very likely to prevail along and off Tamil Nadu and Puducherry coasts.
For the next two days on November 27 and 28, squally weather with wind speed 55 kmph to 65 kmph and gusting to 75 kmph is likely to prevail over Tamil Nadu coast.