The low is likely to intensify, said a Met office bulletin on Sunday.
Under its influence, steep pressure gradient persists over the north bay and adjoining areas.
Squally weather is likely to affect the maritime ports, north bay and adjoining coastal areas of Bangladesh.
Under the influence of the low, the low-lying areas of the coastal districts of Cox’s Bazar, Chattogram, Noakhali, Laxmipur, Borguna, Bhola, Patuakhali, Barishal, Pirojpur, Jhalakati, Bagerhat, Khulna and Satkhira and their offshore islands and chars are likely to be inundated by wind-driven surge of 2-4 feet height above normal astronomical tide.
All fishing boats and trawlers over the north bay have been advised to remain close to the coast and proceed with caution till further notice.
They have also been advised not to venture into the deep sea.