Intense convective clouds are hovering over Chennai, Thiruvallur, Ranipet, Kanchipuram, Chengelpattu, Villupuram, Tiruvannamalai, Kallakuruchi, Cuddalore and Ramanathapuram districts, the Regional Meteorological Centre, Chennai, said this (Sunday) morning.

They have a ‘medium’ potential to trigger moderate to heavy rainfall until 11.30 AM, the update said. This turn of events comes about as a second successive rain-diving trough, apparently more resourceful than the predecessor, approaches the Tamil Nadu and Coastal Andhra Pradesh coasts.