Light to Moderate rain with Thunderstorm with Lightning is likely to occur at isolated places over Coimbatore, Dharmapuri, Dindigul, Erode, Karur, Krishnagiri, Namakkal, Ranipet, Salem, Tenkasi, The Nilgiris, Tirunelveli, Tirupathur, Tiruppur, Tiruvannamalai, Vellore in next 3 hours.