Light to moderate rain with thunderstormL likely to occur at isolated places over Ramanathapuram, Ranipet, Salem, Sivaganga, Tenkasi, Thanjavur, Theni, The Nilgiris, Thiruvallur, Thiruvarur, Tiruchirappalli, Tirunelveli, Tiruppur, Tiruvannamalai, Vellore, Viluppuram, Karaikal, Pondicherry in next 3 hours.