Chennai weather: IMD predicts heavy rain in several parts of Tamil Nadu due to cyclonic circulationChennai experienced light to moderate rainfall since Wednesday night, with predictions of heavier showers in the city and surrounding areas. Districts like Chengelpet, Kanchipuram, and those along the coast from Villupuram to Ramanathapuram are also expected to see increased rainfall. This weather pattern is attributed to stronger easterlies and a cyclonic circulation over the Bay of Bengal.