The low-pressure area over southwest Bay of Bengal and adjoining Sri Lanka coast intensified into a well-marked low over the same area at 06 am on Wednesday, according to Bangladesh Meteorological Department (BMD).
It is likely to move north-northwesterly direction and intensify further, said the Met office.
Besides, a deep depression over Strait of Malacca and adjoining area intensified into a deep depression first then into a cyclonic storm "Senyar’ over the same area and lay centered at near lat. 5.0°N & long. 98.0°E at 6 am on Wednesday.
It is likely to move westwards direction.
All fishing boats and trawlers over North Bay have been advised not to venture into the deep sea till further notice.