Bazlur Rashid, an official at the Met Office, told bdnews24.com on Friday that the active southwestern monsoon had created deep clouds over the North Bay.
The country's coastal areas, he said, might be affected by heavy winds due to the deep clouds.
The maritime ports of Chittagong, Cox's Bazar and Mongla were advised to keep hoisted local cautionary signal No 3.
Fishing boats and trawlers plying the North Bay were also advised to move cautiously until further instructions.
It is feared that tidal waves, surging 1-3 feet higher than usual ones due to the southwestern monsoon and the appearance of the new moon, could flood the coastal areas of Cox's Bazar, Chittagong, Noakhali, Feni, Lakshmipur, Chandpur, Comilla, Bhola, Barisal, Patuakhali, Barguna, Pirojpur, Jhalakati, Bagerhat, Khulna, Satkhira, and adjacent islands and chars, Rashid said.
