The maritime ports of Chattogram, Cox's Bazar, Mongla and Payra have been advised to keep hoisting the distant warning signal number two as the deep depression turned into a cyclonic storm named Mandous over the Bay of Bengal.
The weather system over the southwest Bay and adjoining area moved west-northwestwards over the same area and is likely to move in a west-northwesterly direction, the Bangladesh Meteorological Department (BMD) said in a special bulletin on Thursday.
Cyclone Mandous was centred about 1,650km southwest of Chattogram port, 1,590km southwest of Cox's Bazar port, 1,565km southwest of Mongla port, and 1,550km southwest of Payra port at 6am, it said.
Maximum sustained wind speed within 54km of the cyclone centre is about 62km per hour rising to 88km per hour in gusts. Sea will remain very rough near the cyclone centre.
All fishing boats and trawlers over the north Bay and deep sea have been advised to remain close to the coast and proceed with caution. They are also advised not to venture into the deep sea.