Severe cyclonic storm Mandous is set to weaken into a cyclone, as it heads towards the north Tamil Nadu coast, and makes landfall around Mamallapuram between midnight on Friday and the early hours of Saturday. Some of the weather stations in TN that received moderate to heavy rains till 5.30 am on Friday are: Nungambakkam 5.3 cm; Meenambakkam 5 cm; …