A low-pressure area is likely to form over Southeast Bay and adjoining area around 21 October and it may intensify into a depression, according to Bangladesh Meteorological Department.
The seasonal low lies over South Bay, extending its trough to North Bay.
Rain/thunder showers is likely to occur at one or two places over Khulna, Barishal & Chattogram divisions in 24 hours commencing 9am on Sun day, said a Met office bulletin.
One to three low-pressure systems likely over Bay of Bengal this month
Weather may remain mainly dry with partly cloudy sky elsewhere over the country.
Day and night temperature may remain nearly unchanged over the country.