Satellite pictures this morning show clouds bearing down on the South Andhra Pradesh, the Tamil Nadu coast, and a little distance away from the East Sri Lankan coast.
The cloud over stretched along Nellore-Kavali-Ongole in South Coastal Andhra Pradesh and Vedaranyam - Karaikal - Chidambaram - Cuddalore - Puducherry - Kelambakkam in Tamil Nadu.
The causative cyclonic circulation over Sri Lanka and the Gulf of Mannar (which separates the island nation from peninsular India) continued to hover unchanged from its position.
In its weather outlook for today, India Met Department (IMD) said heavy rain is likely at isolated places over Tamil Nadu, Puducherry, South Coastal Andhra Pradesh and Kerala.
It has also warned that thundershowers accompanied with lightning are possible at isolated places over Tamil Nadu, Puducherry, South Coastal Andhra Pradesh, Rayalaseema and Kerala.
As for tomorrow and the day after, heavy rain is likely at isolated places over Tamil Nadu, Puducherry, South Coastal Andhra Pradesh and Kerala.
On Saturday, rains will scale up to heavy to very heavy over Coastal Tamil Nadu and Puducherry and heavy over interior Tamil Nadu, South Coastal Andhra Pradesh, Rayalaseema and Kerala.
On Sunday, Coastal Tamil Nadu, Puducherry and Coastal Andhra Pradesh will remain in focus by when a likely storm developing in the Andaman Sea/Bay of Bengal would have taken proper shape.
VIGOROUS MONSOON
The IMD said that the North-East monsoon was vigorous over Tamil Nadu and Puducherry yesterday even thunderstorms broke out over Tamil Nadu, Puducherry and Kerala until early this morning.
Rainfall was recorded at many places over Tamil Nadu and Puducherry and isolated places over Kerala and Coastal Andhra Pradesh.
Twin cyclonic circulations located over Sri Lanka-Gulf of Mannar and Lakshadweep-Maldives islands are the systems currently dictating weather over the South Indian Peninsula and Sri Lanka.
The IMD expected a low-pressure area to form over the Gulf of Thailand with implications for Andaman Sea/Bay of Bengal where it is likely headed to.
But the Thailand Met Department has located a depression in the South China Sea, which it believes is moving into adjoining Gulf of Thailand but evolved twice over than what the IMD has in mind.