Chennai, Dec 26 (Reporter) The Well Marked Low Pressure Area over the Bay weakened into the Low Pressure area, even as incessant rains lashed Chennai and its neighbouring Northern districts, on Thursday. Met office said the Well Marked Low Pressure Area over the Bay over Southwest and adjoining Westcentral bay of Bengal off South Andhra Pradesh-North Tamil Nadu coasts moved westwards and weakened into a Low Pressure area over the same region at 0530 hrs today. The associated cyclonic circulation now extends up to 3.1 km above mean sea level. Under the influence of these systems, light to moderate rainfall, accompanied with thunderstorm and lightning is very likely to occur at a few places, with heavy rainfall at isolated places over Coastal Andhra Pradesh. Light to moderate rainfall at isolated places accompanied with thunderstorm and lightning will occur over Tamil Nadu, Puducherry and Karaikal. The Met office also forecast light to moderate rains at isolated places over Chennai, Tiruvallur, Chengalpattu, Kanchipuram, Vellore, Ranipet, Tiruvannamalai, Villupuram, Kallakurichi and Cuddalore districts of Tamil Nadu and Puducherry. Meanwhile, incessant rains lashed Chennai City and its suburbs and neighbouring districts this morning. The city experienced sharp showers in brief spells on a couple of occasions last evening. After a brief respite, rains returned this morning as the system persisted over the North Tamil Nadu Coast. The showers, were slightly heavy in some areas, though normal life was not affected. However, once the system weakened, rains abated and bright sunshine pierced the grey skies. Met office said some parts of Chennai and neighbouring districts of Kancheepuram and Tiruvallur received a maximum of three cms of rain, with Villivakkam coming under Tiruvallur district recording the highest of 4 cms of rainfall, during the last 24 hrs ending at 0830 hrs this morning. It was followed by ACS Medical College ARG (dist Kancheepuram), CD Hospital Tondiarpet (dist Chennai), Ambattur MW (dist Chennai), Ayanavaram Taluk Office (dist Chennai), Chennai Collector Office (dist Chennai), Poonamalle ARG (dist Tiruvallur) 3 each, Ambathur Rev (dist Chennai), Perambur (dist Chennai), Ranipet AWS (dist Ranipet), MGR Nagar (dist Chennai), Chennai(N) AWS (dist Chennai), Chennai (N) (dist Chennai), Gummidipoondi (dist Tiruvallur), Meenambakkam AWS (dist Chennai), Anna University (dist Chennai), Alandur (dist Chennai), Chennai (AP) (dist Chennai), Ennore AWS (dist Tiruvallur), Anna University ARG (dist Chennai), Ponneri (dist Tiruvallur), Puzhal ARG (dist Tiruvallur), YMCA Nandnam ARG (dist Chennai) 2 each, Some parts of Chengalpattu, Kallakurichi, Tiruvallur, Villupuram, Chennai and Tiruvannamalai districts recorded one cm of rain...////...