Heavy rainfall and thunderstorms are forecasted for 12 districts in Tamil Nadu today, according to the Regional Meteorological Centre (RMC). The districts set to experience significant rainfall include Chennai, Chengalpattu, Tiruvallur, Kancheepuram, Nilgiris, Coimbatore, Ramanathapuram, Pudukottai, Nagapattinam, Thoothukudi, Tirunelveli, and Kanyakumari.
The RMC has also issued a yellow alert for 19 districts in Tamil Nadu, predicting heavy rains over the next two days. This weather pattern is linked to a cyclonic system and an upper air circulation above the sea.
Areas anticipated to receive considerable rainfall are Coimbatore, Tiruppur, The Nilgiris, Madurai, Erode, Virudhunagar, Theni, Dindigul, Tenkasi, Tirunelveli, Kanyakumari, Krishnagiri, Ramanathapuram, Dharmapuri, Salem, Namakkal, Karur, Thoothukudi, and Sivaganga.
Although a cyclonic circulation over the Gulf of Mannar has diminished, an upper air circulation persists over the southwest Bay of Bengal, close to the southern Andhra coast. Extended forecasts indicate that coastal Tamil Nadu may face below-normal rainfall, while other regions could see above-normal precipitation through November 7. From November 8 to 14, near-normal to slightly above-normal rainfall is expected across much of Tamil Nadu.
Fishermen are advised to avoid venturing into the sea for the next 48 hours, as winds of 35-45 km/h, with gusts up to 55 km/h, are anticipated along the southern Tamil Nadu coast, the Gulf of Mannar, and around the Cameron region.
The Northeast Monsoon, which started on October 17, has already delivered significant rainfall to Tamil Nadu. The India Meteorological Department (IMD) forecasts that northern Tamil Nadu will experience normal to above-normal rainfall, while the southern regions are expected to have normal levels of rainfall, although many southern districts have already seen substantial downpours.
For the October-December period, the IMD projects that the southern peninsular region, which includes Kerala, Tamil Nadu, and Andhra Pradesh, will receive 112% of the long-term average rainfall of 33.4 cm. Typically, Tamil Nadu receives an average of 44 cm during the northeast monsoon period.