The deep depression over the west central bay and adjoining area of Bangladesh has moved north-northwestwards further over the same area.
It was centered at 6pm on Friday about 905 kms southwest of Chittagong port, 855 kms southwest of Cox's Bazar port, 795 kms south-southwest of Mongla port and 785 kms south-southwest of Payra port.
According to a met office special bulletin, it is likely to intensify further and move in a north-northwesterly direction.
Under its influence, deep convection is taking place over the North Bay and squally weather might affect the coastal regions of Bangladesh and the maritime ports.
Maximum sustained wind speed within 48 kms of the depression centre is about 50 kph rising to 60 kph in gusts. Sea will remain rough near the deep depression centre.
The maritime ports of Chittagong, Cox's Bazar, Mongla and Payra have been advised to keep hoisted local cautionary signal No 3.
All fishing boats and trawlers over the North Bay have been advised to take shelter immediately.
They have also been advised to remain in shelter till further notice.