Today (29.12.2021)
Light rain is likely to occur at isolated places over coastal Tamilnadu, Puducherry & Karaikal area. Mainly dry weather is likely to prevail over interior Tamilnadu.

Tomorrow (30.12.2021)
Thunderstorm with moderate rain is likely to occur at a few places over coastal Tamilnadu, Puducherry & Karaikal area.
Thunderstorm with light rain is likely to occur at isolated places over interior Tamilnadu.

FOG/MIST WARNING:
Today(29.12.2021) & Tomorrow(30.12.2021):
Shallow fog/mist is likely to occur at isolated pockets over Western Ghat districts & adjoining districts of Tamilnadu.

THUNDERSTORM WARNING:
Tomorrow (30.12.2021): Thunderstorm with lightening 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 rain is likely to occur in some areas. Maximum and minimum temperature is likely to be round 31˚C and 23˚C respectively.

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