The well-marked low over southeast Bay and adjoining area has intensified into a depression over west-central Bay and adjoining area, Bangladesh Meteorological Department (BMD) said in a special bulletin on Sunday.
It was centred about 1,040km west-southwest of Chittagong port at 6am on Sunday, 985km west-southwest of Cox's Bazar port, 935km southwest of Mongla port and 925km southwest of Payra port, according to the special bulletin.
It is likely to intensify further, BMD predicted.
Meanwhile, the maritime ports of Chittagong, Cox's Bazar, Mongla and Payra have been advised to hoist distant cautionary signal no one.
The weather may remain mainly dry with temporary partly cloudy skies over the country, with chances of light rain at one or two places in Khulna, Barisal and Chittagong divisions, according to BMD.
Day temperatures may remain nearly unchanged, and nighttime temperatures may rise slightly across the country.
The mercury reached 36° – the highest – in Cox’s Bazar, while the minimum temperature was recorded at 16.8° in Tetulia of Rangpur division.