The maritime ports of Chattogram, Cox's Bazar, Mongla and Payra have been asked to lower cautionary signal No 3, as squally weather is unlikely over the Bay.

The weather office had earlier advised the maritime ports to hoist cautionary signal No 3 -- which means a depression has formed and may affect the port later -- in the wake of the formation of a low pressure area over the Bay of Bengal.

But squally weather is unlikely over the North Bay and adjoining coastal areas of Bangladesh, the Met office said in a special bulletin on Thursday.

However, all fishing boats and trawlers in the North Bay and the deep sea have been advised to proceed with caution till this evening, it added.

On Wednesday, the well-marked low pressure area over the northwest Bay and adjoining areas moved west-northwards and weakened into a low.