Light to moderate Rain with TS is likely to occur at isolated places over Chennai, Erode, Kallakurichi, Nagapattinam, Namakkal, Perambalur, Ranipet, Salem, Thanjavur, Thiruvallur, Thiruvarur, Tiruchirappalli, Tirupathur, Tiruvannamalai, Vellore, Viluppuram, Karaikal, Pondicherry in next 3 hours.