Tamil Nadu Weather: 11 Dists On Yellow Alert; Chennai to See On-and-Off Rains Till Tuesday

Tamil Nadu is set for an extended spell of rain over the next few days, with the Regional Meteorological Centre (RMC) and weather bloggers forecasting widespread showers across the state.

According to weather blogger RJ Pradeep, Chennai and the rest of the KTCC belt - Kanchipuram, Tiruvallur, Chennai, and Chengalpattu - will experience intermittent rains with sudden intense spells till Tuesday.

Low Pressure Near Sri Lanka to Drive Rainfall

A low-pressure area positioned near Sri Lanka is gradually moving towards the Comorin Sea (Kumari Kadal). This location typically strengthens rain bands over Tamil Nadu, bringing rainfall to most districts.

RJ Pradeep noted that whenever a low-pressure system sits over the Comorin Sea, "rainfall becomes widespread across Tamil Nadu," affecting central, southern, western, and northern districts.

Observed Rainfall

Light rain has already been recorded across several parts of Tamil Nadu, while moderate showers were reported in the Delta and South TN districts.

Chennai & KTCC Forecast

Residents in Chennai, Kanchipuram, Tiruvallur, and Chengalpattu can expect:

On-and-off showers with brief intense bursts

Rains likely until Tuesday

Occasional breaks between spells

The weather blogger explained:

"Chakkaram update: The chakkaram has been pushed now into December month. Still 8/9 more days to go. It is a complex system so we need to wait for more clarity.

Forecast for Next 24 Hours from 22.11.2025 8.30 am to 23.11.2025 8.30 am: Whenever Low Pressure is in Comorin Sea, rains will be widespread across Tamil Nadu. All districts will see on and off rains with breaks. So, central, south, west and north all districts will get moderate rainfall.

Heavy Rainfall Alert: Delta districts (Mayiladuthurai, Tiruvarur, Nagai) has chance of heavy rains in some places.

Very heavy rainfall areas: Thoothukudi, Ramanathapuram, Nellai, Thenkasi will have a chance of Very heavy rainfall in some places of the district.
Extreme heavy rainfall areas: Manjolai hills in Nellai has chance of extreme rainfall."

Official RMC Alert

The Regional Meteorological Centre has issued a warning for heavy rain at isolated places on Saturday over:

• Kanyakumari
• Tirunelveli
• Thoothukudi
• Tenkasi
• Ramanathapuram
• Pudukkottai
• Thanjavur
• Tiruvarur
• Nagapattinam
• Mayiladuthurai
• Cuddalore

The above districts are on yellow alert. For Chennai, the RMC predicts one or two spells of light to moderate rain, accompanied by thunderstorms and lightning over the next two days.

Sunday Forecast

On Sunday, heavy rain is likely in:

• Kanyakumari
• Tirunelveli
• Tenkasi
• Thoothukudi
• Ramanathapuram
• Sivaganga
• Madurai
• Virudhunagar
• Pudukkottai
• Thanjavur
• Tiruvarur
• Nagapattinam
• Mayiladuthurai
• Karaikal