"The yesterday's well marked low pressure area now lies over west central and adjoining south west bay of southern Andhra and northern Tamil Nadu coast," Director of Regional Meteorological Centre (RMC) here S R Ramanan told PTI.
Asked if the present system could develop into a depression, he said, "it may move further and might develop into a depression, we are closely monitoring."
The North East monsoon, which accounts for 48 per cent of total annual rainfall of Tamil Nadu, has set in yesterday with several parts of the state experiencing rains.