As expected, the depression over West-central Bay of Bengal has weakened overnight to a well-marked low-pressure area on Tuesday.
It will undergo another round of weakening before it curls in towards the north Tamil Nadu-south Andhra Pradesh coasts in another couple of days.
The India Meteorological Department (IMD) assessed that it would still be able to trigger some rains along the coast, which may spill into the interior Peninsula later.
Kerala (-25 per cent) was the lone rain-deficit State in the peninsula thus far during the North-east monsoon season. Neighbouring met subdivisions Telangana, coastal Andhra Pradesh, Konkan and Goa have recorded surplus rain. Tamil Nadu, coastal Karnataka, Rayalaseema, Marathwada and Madhya Maharashtra have witnessed normal rainfall during this period.
Global models are forecasting a wave of fresh rains for southern Tamil Nadu and adjoining Kerala from end-November into early December. On Tuesday, satellite pictures showed rain-bearing clouds over West-central, North-east and East-central Bay of Bengal and Andaman Sea.
An IMD forecast valid until Friday said that rain or thundershowers are likely over coastal Andhra Pradesh as the low-pressure system approaches.
Thundershowers have been forecast at one or two places over Rayalaseema, Tamil Nadu and Kerala on Wednesday and at a few places thereafter. Telangana, coastal and south interior Karnataka and Lakshadweep may witness thundershowers from Thursday.
An extended forecast valid until Tuesday next said that rain or thundershowers would occur at many places over peninsular India.