Chennai - 11:27pm, light steady rain continue over polichalur zone for past 1hour.

Weather Instagram at June 29, 2014 at 03:34PM

#chennai - 3:30pm, a heavy T shower is now sweeping N-W suburbs. #weather

from Instagram

#Chennai - 2:25pm, T showers seen now over N,N-W suburbs, at around 30 to 60km from city.

-- update at 3:37pm --
#Chennai - 3:30pm, A super T shower is now over W,N-W suburbs and some over central zones of city ... http://ow.ly/i/63WGH 

RT @vasudevan_k: Heavy rains in Perambur area now. #ChennaiRains @weatherofindia (3:38pm)

More T showers possible today for S,S-E Karnataka, S Andhra, N,N-E,N-central Tamilnadu.

Chennai can expect a T shower today as well, after 4pm

Bangalore city is also expected to receive a T shower today evening.
Not expected to be widespread.