"A low pressure area has formed over Southeast Bay of Bengal and neighbourhood on December one and now lies as a well
marked low pressure area over Southwest and South East Bay of Bengal and may concentrate into a depression during the next 24 hours", a weather bulletin said.
Few places in Tamil Nadu, coastal Karnataka, Kerala and Lakshadweep received rainfall during the last 24 hours as per the observations recorded at 8.30 am today.
For Chennai, the sky condition is expected to be generally cloudy while few spells of rainfall or thundershower would occur, it said.