Light to Moderate Rain with Thunderstorm and Lightning is very likely to occur at isolated places over Coimbatore, Dharmapuri, Erode, Karur, Krishnagiri, Mayiladuthurai, Nagapattinam, Namakkal, Perambalur, Pudukkottai, Salem, Thanjavur, The Nilgiris, Thiruvarur, Tiruchirappalli, Karaikal in next 3 hours.