Deep convection is taking place over north Bay and adjoining coastal areas of Bangladesh under the influence of the low over the northwest Bay and adjoining west central Bay, said a Met Office bulletin last night.
"Squally weather may affect the maritime ports and the coastal regions of Bangladesh," it warned.
Chittagong, Cox's Bazar and Mongla seaports have been advised to keep hoisted local cautionary signal number three.
All fishing boats and trawlers over the north Bay have been advised to come close to the coast and proceed with caution till further notice.