Chennai, Dec 11(Reporter) Yesterday’s Well Marked Low Pressure Area over the Southwest and adjoining Southeast Bay of Bengal lay over southwest Bay of Bengal off Sri Lanka coast with the associated upper air cyclonic circulation extending up to mid-tropospheric levels. The system is very likely to continue to move west-northwestwards towards Sri Lanka-Tamil Nadu coasts during the next 24 hours, Met office on Wednesday said. It is expected to bring in heavy rains in North Tamil Nadu and in Cauvery delta and also in southern districts for the next 2-3 days. Met office said as of now it is unlikely to intensify as a Cyclone as there are still several stages left. It has now only became a Well Marked Low Pressure. Then it should become as Depression, Deep Depression and then as Cyclone, Regional Met office Director S.Balachandran said, adding the movement of the systems was being continuously monitored. There might be heavy rains, some times very heavy at isolated places, but it would not be to the extent of the Cyclone Fengal induced rains that battered several districts. Heavy to very heavy rain is likely to occur at isolated places over Cuddalore, Mayiladuthurai, Nagapattinam, Thanjavur, Tiruvarur, Pudukkottai districts of Tamil Nadu and Karaikal area. Heavy rain is also likely to occur at isolated places over Sivaganga, Ramanathapuram, Tiruchirappalli, Perambalur, Ariyalur, Kallakurichi, Villupuram, Chengalpattu, Kancheepuram, Chennai, Tiruvallur districts of Tamil Nadu and Puducherry. Heavy to very heavy rain is likely to occur at isolated places over Ariyalur, Thanjavur, Tiruvarur and Pudukkottai districts of Tamil Nadu tomorrow. Heavy rain is likely to occur at isolated places over Chennai, Tiruvallur, Kancheepuram, Chengalpattu, Tiruvannamalai, Villupuram, Kallakurichi, Cuddalore, Perambalur, Tiruchirappalli, Sivaganga, Ramanathapuram, Mayiladuthurai, Nagapattinam, Coimbatore, Tiruppur, Karur, Theni, Dindigul, Madurai, Virudhunagar, Tenkasi, Thoothukudi districts of Tamil Nadu Puducherry and Karaikal area. On December 13, heavy rain is likely to occur at one or two places over Nilgiris, Coimbatore, Tiruppur, Theni, Dindigul, Madurai, Virudhunagar, Tenkasi, Tirunelveli, Thoothukudi, Ramanathapuram, Sivaganga, Kanyakumari districts of Tamil Nadu. There is expected to be lull for two days and on December 16 and 17 heavy rain is likely to occur at one or two places Chengalpattu, Villupuram, Cuddalore, Mayiladuthurai, Nagapattinam, Thanjavur, Tiruvarur, Pudukkottai, Ramanathapuram districts of Tamil Nadu, Puducherry and Karaikal area. Surface winds, speed reaching 35-45 kmph, at times, likely over coastal and adjoining areas of Surface winds, speed reaching 35-45 kmph, at times, likely over coastal and adjoining areas of Tamil Nadu, Puducherry and Karaikal areas for the next 2 days...////...