Light to moderate Rain is very likely to occur at isolated places over Ariyalur, Chengalpattu, Chennai, Coimbatore, Erode, Kancheepuram, Krishnagiri, Ranipet, Salem, Tenkasi, Theni, The Nilgiris, Thiruvallur, Tiruppur, Tiruvannamalai, Vellore in next 3 hours.