India Met Department has said that a low-pressure area would develop over South Andaman Sea and neighbourhood in two days time.
There is already an upper air cyclonic circulation present in the area, which is expected to descend to lower levels to set up the 'low' by Thursday (November 26), the Met Department said.
This is widely believed to be the system bringing in the next wave of heavy to very heavy rain along the Tamil Nadu, Puducherry, and Coastal Andhra Pradesh belt through the weekend.
Weather models will put this system under constant watch for signs of intensification since it has a lot of ground to cover before it reaches coast tentatively in another week's time (Tuesday, December 1).
Thunderclouds have been converging over the Andaman and Nicobar Islands, and some of them have broken away and floated half-way down towards the stretch to East India, satellite pictures show.
WEATHER WARNING
A weather warning issued by the Met Department this afternoon said the following:
Tomorrow (Wednesday): Heavy rain at isolated places over Andaman and Nicobar Islands.
Thursday : No weather warning for Tamil Nadu-Puducherry coast.
Friday : Heavy rain at isolated places over Coastal Tamil Nadu and Puducherry.
Saturday : Heavy to very rain at isolated places over Coastal Andhra Pradesh, Tamil Nadu and Puducherry.
Meanwhile, satellite pictures this afternoon indicated that thundershowers may break out over parts of the West Coast Thiruvananthapuram, Kochi, Kozhikode, Mangaluru and Goa.
MUTED NOW
On the other hand, proceedings are muted over Tamil Nadu in what is a brief lull ahead of the next wave of rains.
Also, the existing low-pressure area that has been sustaining the rains over many parts of the South Peninsula has weakened this afternoon, the Met update said.
However, the troughs that had linked the 'low' with Lakshadweep and the mainland have merged, and is still capable of generating some rain along the coast and the interior.