Southwest monsoon normally sets in over Kerala around I June. This year, monsoon has set in over most parts of South Arabian Sea, Kerala, some parts of Tamilnadu, south Bay of Bengal and South Andaman Sea on 29 May 2011. Setting in of monsoon was delayed by about 10 days over Andaman Sea; however, it was early by 3 days over Kerala.
Due to strengthening of cross-equatorial flow over Arabian Sea and formation of an off-shore trough, monsoon further advanced rapidly and has covered entire Kerala, Tamilnadu and Goa, many parts of Karnataka and some parts of south Andhra Pradesh till today. Heavy to very heavy rainfall is occurring along the west coast for the last two days.>>More