Rain or thundershowers would occur at many places over North Coastal Tamil Nadu, Puducherry, South Coastal Andhra Pradesh while isolated rain or thundershower may occur over Karnataka, Rayalaseema and Lakshadweep, he said.
According to the observations recorded at 8.30am today, the Met office said Sathanur Dam in Tiruvannamalai district received highest rainfall of 10 cms in the last 24 hours ending 8.30 am.
For Chennai, the official said, sky conditions would generally be cloudy with few spells of rain or thundershowers.