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The deep depression over the southeast Bay of Bengal intensified into a cyclonic storm 'Mocha, according to Bangladesh Meteorological Department (BMD).
In a special weather bulletin issued at 8:30am on Thursday, the Met office also said maximum sustained wind speed within 54km of the cyclone centre is about 62kph rising to 88kph in gusts or squalls.
It was centred about 1295km south-southwest of Chattogram port, 1220km south-southwest of Cox's Bazar port, 1265km south-southwest of Mongla port and 1225km south-southwest of Payra port at 6am on Thursday (May 11).
The maritime ports of Chattogram, Cox’s Bazar, Mongla and Payra have been advised to lower distant cautionary signal No. 1 and hoist distant warning signal No. 2 instead.
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.
Meteorologist Bazlur Rashid confirmed the matter.