Kallakkadal alert sounded: Coastal parts of Kerala, south Tamil Nadu warned of likely ocean swells

​​"There is a possibility of rough seas due to high waves of 0.5 to 1.5 metres during this period," according to the Indian National Centre for Ocean Information Services (INCOIS). INCOIS, the central agency that issues weather warnings for fishermen in the country, advised people to safely moor their fishing vessels in the harbour.