The Bay of Bengal is witnessing another developing weather system that could bring fresh rainfall and strong winds to India's eastern and southern co. The depression over southeast Bay of Bengal and adjoining areas of Andaman and Nicobar Islands and Andaman Sea moved west-northwestwards with speed of 30 kmph during past six hours and lay centered about 960 km east-southeast of Chennai (Chennai), 980 km southeast of Vishakhapatnam (Andhra Pradesh) and 1030.