The deep depression over Southeast Bay and adjoining Southwest Bay moved west-northwestwards, intensified into a Cyclonic storm "Murasu" and now lies over Southwest and adjoining Westcentral Bay.
It now lies at 12pm on Sunday about 1350 km southwest of Chittagong, 1290 km southwest of Cox's Bazar, 1260 km southwest of Mongla and 1245 km southwest of Payra Port, said a special bulletin of met office.
It is likely to move west-northwestwards and intensify further into a severe cyclonic storm. Then it may cross the Andhra Pradesh coast of India by Monday as a severe cyclonic storm.
Maximum sustained wind speed within 54 km of the cyclone centre is about 62 kph, rising to 88 kph in gusts or squalls.
Sea will remain very rough near the cyclone centre.
Maritime ports of Chittagong, Cox's Bazar, Mongla and Payra have been advised to lower distant cautionary signal number one but instead hoist distant warning signal No 2.
All fishing boats and trawlers over North Bay have been advised to come close to the coast and proceed with caution till further notice.