A low-pressure area is forming over the east-central Bay of Bengal and adjoining area, which could intensify into a cyclonic storm, the Met Office said.

Fishermen have been advised not to go deep into the sea. Those who are already there should return to the coast by Sunday, as per a special bulletin of the Met department.

At the same time, maritime ports have been asked to hoist remote warning signal no. 1.

The storm is likely to move north-westwards and reach the Odisha-West Bengal-Khulna coast around May 26, according to the weather department.

A trough of westerly low lies over West Bengal and adjoining areas, extending up to North Bay, it said.

Rains or thundershowers accompanied by temporary gusty winds are likely to hit some places in Rangpur, Mymensingh and Sylhet divisions and one or two areas in Rajshahi and Dhaka divisions, as well as the regions of Jashore, Kushtia Cumilla and Noakhali.

Weather may remain mainly dry elsewhere in the country.

Several parts of Bangladesh — including Dhaka, Khulna and Barishal divisions — are currently witnessing a mild to moderate heat wave and it may continue, according to the weather department.