Clouds converging from south east of Chennai. It won`t be like yesterday rains but will be decent spell. Rains will start in 30 to 60 mins depending on the location you reside. South guys will get early.
Meanwhile look at the numbers, to me this betters the 2014 and 2017 first spells of monsoon rains. Particularly North Chennai has got a pounding from rains. 300 mm+ rains in 36 hrs are extreme spells.