The Depression in Bay of Bengal has been moving North as expected by Models. South Tamil Nadu has been seeing isolated rains continue under the influence of a prevailing wind instability as moist Easterlies and the slightly more drier Westerlies meet along the Western Ghats. Yesterday saw parts of Virudhunagar district record moderate rains along with parts of Tirunelveli & Thootukudi districts.
Today also we are likely to see rains continue for parts of South Tamil Nadu as low level wind discontinuity persists leading to evening thunderstorms in the region. The usual suspects along the Western Ghats with parts of Tiruneveli & Thootukudi districts will record light to moderate rains in one or two places.
The Depression under favorable conditions continues to track North/Northwest as for another 24 hours it is possibly going to intensify and become a Deep Depression during the time. Subsequently the increasing wind shear and possible interference from the incoming trough & overall dry air environment could gradually weaken it before landfall.
Mostly dry weather likely to prevail over rest of Tamil Nadu including Chennai.