Today (14.12.2021)
Thunderstorm with moderate rain is likely to occur at a few places over districts of Coastal Tamilnadu, Puducherry & Karaikal area.
Light to moderate rain is also likely to occur at a few places over rest Tamilnadu.

Tomorrow (15.12.2021)
Moderate rain is likely to occur at a few places over districts of Coastal Tamilnadu, Puducherry & Karaikal area.
Light to moderate rain is also likely to occur at a few places over rest Tamilnadu.

THUNDERSTORM WARNING:
Today(14.12.2021): Thunderstorm with lightning is likely to occur at isolated places over Tamilnadu.

LOCAL FORECAST FOR CHENNAI CITY AND NEIGHBOURHOOD:
For next 24 HRS:
Sky condition is likely to be partly cloudy. Light to moderate rain is likely to occur in some areas.
Maximum and minimum temperature is likely to be around 31˚C and 24 ˚C respectively.

Reference:
http://imdchennai.gov.in/tn_fc.pdf
http://www.imdchennai.gov.in/hrw_district.htm