"There is a possibility of rough seas due to high waves of 0.5 to 1.5 metres during this period," according to the INCOIS.
Rough seas. (Representational/ iStock)
Coastal areas of Kerala and southern Tamil Nadu may experience the ‘kallakkadal‘ phenomenon from 2.30 am on Saturday to 11.30 pm on Sunday, 5 May, weather agencies alerted fishermen and coastal residents. The red alert was issued for the phenomenon of “sudden swell of the seas causing rough waves” by Indian National Centre for Ocean Information Services and NDMA.