The India Meteorological Department (IMD) has issued the following Forecast and Nowcast warnings across Tamil Nadu on Monday (27 July):

• Forecast: A yellow alert for thunderstorms accompanied by lightning and squalls has been issued for Ariyalur, Chengalpattu, Chennai, Coimbatore, Cuddalore, Dharmapuri, Dindigul, Erode, Kallakurichi, Kancheepuram, Kanniyakumari, Karur, Krishnagiri, Madurai, Mayiladuthurai, Nagapattinam, Namakkal, the Nilgiris, Perambalur, Pudukkottai, Ramanathapuram, Ranipet, Salem, Tenkasi, Thanjavur, Theni, Thoothukudi, Tiruchirappalli, Tirunelveli, Tirupathur, Tiruppur, Tiruvallur, Tiruvannamalai, Tiruvarur, Vellore, Viluppuram and Virudhunagar. No warning has been issued for Sivagangai.
• Nowcast: No warning has been issued, valid till 0400 hours (local time) on Monday (27 July).