The Regional Meteorological Centre has warned that several atmospheric systems are influencing weather conditions across southern India. A trough extending across central-western, southwestern and Kanyakumari sea regions, along with upper-air cyclonic circulations over the Bay of Bengal and the southeast Arabian Sea, is expected to trigger rainfall across Tamil Nadu.
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Light to moderate rain accompanied by thunderstorms and lightning is likely in many parts of the state. Heavy rainfall, along with gusty winds reaching 40–50 kmph, is expected in the districts of Nilgiris, Coimbatore, Tiruppur, Dindigul, Theni, Karur, Tiruchirappalli, Namakkal, Erode, Salem, Dharmapuri, Krishnagiri, Tirupattur, Vellore, Ranipet, Tiruvannamalai and Villupuram.