The well-marked low over northwest Madhya Pradesh and the adjoining area is likely to weaken gradually, said the weather department on Wednesday.
Under its influence, deep convection is also taking place over North Bay and adjoining area, the Met office said in a special bulletin.
Besides, the monsoon is strong over North Bay, it added.
Squally weather may affect the maritime ports, North Bay and adjoining coastal areas of Bangladesh.
Maritime ports of Chattogram, Cox’s Bazar, Mongla and Payra have been advised to keep hoisted local cautionary signal No 3.
"All fishing boats and trawlers in the North Bay have been advised to remain close to the coast and proceed with caution until further notice," the department said.
They are also advised not to venture into the deep sea, it added.
Meanwhile, light to moderate rains or thundershowers accompanied by temporary gusty winds are likely to occur at most places over Rangpur, Rajshahi, Dhaka, Mymensingh, Khulna, Barishal, Chattogram and Sylhet divisions with moderately heavy to very heavy showers at places over the country, according to the Bangladesh Meteorological Department.
