Light to Moderate Rain with thunderstorm is very likely to occur at a few places over Chengalpattu, Chennai, Coimbatore, Dharmapuri, Dindigul, Kancheepuram, Krishnagiri, Ranipet, Tenkasi, The Nilgiris, Thiruvallur, Thoothukkudi, Tirunelveli, Tirupathur, Tiruvannamalai, Vellore in next 3 hours.