Today (09.12.2021)
Thunderstorm with heavy rain is likely to occur at isolated places over Ramanathapuram, Thoothukudi, Madurai, Virudhunagar, Sivaganga, Ariyalur and Perambalur districts of Tamilnadu.
Thunderstorm with light to moderate rain is likely to occur at many places over rest Tamilnadu, Puducherry and Karaikal area.

Tomorrow (10.12.2021)
Light to moderate rain is likely to occur at a few places over coastal Tamilnadu and south Tamilnadu.
Light rain is likely to occur at isolated places over north interior Tamilnadu.

HEAVY RAINFALL WARNING:

Tomorrow (09.12.2021): Heavy rain is likely to occur at isolated places over Ramanathapuram, Thoothukudi, Madurai, Virudhunagar, Sivaganga, Ariyalur and Perambalur districts of Tamilnadu.

THUNDERSTORM WARNING:
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. Thunderstorm with light to moderate rain is likely to occur in some areas. Maximum and minimum temperature is likely to be around 30˚C and 25 ˚C respectively.

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