Light tto Moderate Rain with Thunderstorm and Lighting is likely to occur at isolated places over Coimbatore, Cuddalore, Dindigul, Erode, Karur, Madurai, Mayiladuthurai, Nagapattinam, Sivaganga, Thanjavur, Theni, Thiruvarur, Tiruvannamalai, Vellore, Viluppuram, Karaikal, Pondicherry in next 3 hours.