Chennai, June 17, 2026:
Several districts across Tamil Nadu are expected to witness thunderstorms, lightning, and scattered rainfall on June 17, while isolated moderate rains are likely in parts of southern Tamil Nadu and the Western Ghats region.
Weather conditions are expected to remain unstable across parts of South India, with rainfall activity also forecast in Kerala, Karnataka, Telangana, Andhra Pradesh, and Odisha.
Moderate Rain Likely in Southern Tamil Nadu
Isolated moderate rainfall is expected over:
- Nagercoil
- Kanyakumari
- Tirunelveli Ghats (Manjolai)
- Tenkasi
- Valparai
- Nilgiris
These areas could experience intermittent showers along with cloudy conditions during the day.
Thunderstorm Alert for Multiple Tamil Nadu Districts
Moderate to intense thunderstorms are possible in:
- Coimbatore
- Tiruppur
- Erode
- Krishnagiri
- Dharmapuri
- Tirupathur
- Vellore
- Tiruvannamalai
- Kallakurichi
- Villupuram
- Puducherry
- Cuddalore
- Mayiladuthurai
- Chidambaram
- Karaikal
- Thanjavur
- Tiruvarur
- Nagapattinam
- Pudukkottai
- Sivagangai
- Dindigul
- Madurai
- Thoothukudi (Interior Areas)
- Virudhunagar
Residents in these districts are advised to remain cautious during thunderstorms and avoid open areas during lightning activity.
Chennai and KTCC Region Forecast
Chennai and the surrounding KTCC (Chennai, Tiruvallur, Kancheepuram, Chengalpattu) region are likely to experience warm and humid conditions during the day.
However, isolated light to moderate rainfall cannot be ruled out if afternoon convective activity combines with favorable sea breeze conditions.
Rainfall Expected Across South India
With weak monsoon conditions continuing along the west coast, isolated light to moderate rains are also likely over:
Kerala
- Thiruvananthapuram
- Kochi
- Kottayam
- Pathanamthitta
- Thrissur
- Idukki
- Kozhikode
- Palakkad
- Malappuram
Karnataka
- South Coastal Karnataka
- Bengaluru and adjoining regions
Other Areas
- Telangana (including Hyderabad)
- Rayalaseema
- North Andhra Pradesh
These regions may witness isolated thunderstorms and brief rain spells.
Heavy Rain Possible in Eastern and Northern India
Moderate to heavy rainfall activity is also expected over:
- Odisha
- West Bengal
- Northeastern States
- Punjab
- Haryana
- Himachal Pradesh
- Jammu & Kashmir
Weather agencies continue to monitor developments as monsoon activity remains uneven across different parts of the country.