While predominantly dry weather prevailed over Tamil Nadu, Chennai saw some isolated rains yesterday afternoon with places in South Chennai enjoying a good spell of rains which came as a relief to the residents. The weather station in Anna University recorded 17 mm rains while the one at Taramani recorded 15 mm from the spell. Western suburbs like Anna Nagar did not record any rains as the thunderstorms moved from Northwest to Southeast direction. 
In the meanwhile with the tropical disturbance over Bangladesh completely dissipating we can expect the winds to come back to normal soon. As of now the trade winds are more Northerly and are expected to become Easterlies in a day or two. With a more Easterly trade winds Northeast Monsoon also is expected to pick up for Tamil Nadu. In the meanwhile we could see isolated rains continue over some parts of Tamil Nadu.
The rains will be more skewed towards South Tamil Nadu under the fading influence of an Upper Air Cyclonic Circulation that is around in the Comorin area. Along with South TN parts of Kerala also is likely to get a spell or two of rains. Coastal areas in the delta region could get some isolated spells of moderate rains in a few places as well.
North Tamil Nadu could see fairly dry conditions prevail with day time temperatures settling at around 33 / 34 degrees in the coastal areas like Chennai.