Maritime ports of Chittagong, Cox's Bazar, Mongla and Payra have been advised to keep hoisted local cautionary signal no three due to a land depression formed in the Bay.
The depression over Gangetic West Bengal, adjoining Odisha, and southwestern part of Bangladesh moved north-north-eastwards and was centred at 9am on Saturday over western part of Bangladesh, said a special bulletin of Met office.
It is likely to move in a north or north-easterly direction further and weaken gradually. Under its influence steep pressure gradient persists and deep convection is continuing over North Bay.
Under the influence of the land depression the low-lying areas of the coastal districts of Cox's Bazar, Chittagong, Noakhali, Laxmipur, Feni, Chandpur, Bhola, Barisal, Patuakhali, Jhalokathi, Pirozpur, Borguna, Bagherhat, Khulna, Satkhira and their offshore islands and chars are likely to be inundated by wind driven surge of 1-2 feet height above normal astronomical tide.
All fishing boat and trawlers over North Bay have been advised to remain in shelter till further notice.