The prevailing easterly wave activity over the Bay of Bengal is expected to trigger scattered to fairly widespread rain/thundershowers over Tamil Nadu, Puducherry, Karaikal, Kerala, Mahe and Lakshadweep for four more days, according to an update by the India Meteorological Department (IMD).

The easterly wave has also spawned a cyclonic circulation over the South-West Bay of Bengal off the Sri Lanka coast, over the Comorin area and adjoining Sri Lanka. This circulation is helping to pull in the rain bands associated with the easterly wave to both over Sri Lanka and southern parts of Tamil Nadu.

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