New Delhi, May 14 -- Heavy to extremely heavy rainfall is expected in parts of India on Wednesday (May 14) as the southwest monsoon advances this week.

The India Meteorological Department said on Tuesday that southwest monsoon advanced into parts of the south Bay of Bengal, south Andaman Sea, Nicobar Islands, and some areas of the north Andaman Sea on Tuesday.

Neeth K Gopal, Regional Director, IMD, Thiruvananthapuram, told news agency PTI on Wednesday that the monsoon flow is progressing very well.

"It has reached Andaman Seas and some parts of South Bay. So, this is the first entry point as well as South West Monsoon monitoring is concerned," he said.

"We have forecasted it to happen on 13th of May. Today, it has reached as expected,...