New Delhi, May 27: The onset of South West Monsoon over Kerala is likely in the next three to four days, the Indian meteorological Department said.
''IMD's meteorological analysis and interpretation of Numerical weather prediction models indicate strengthening and deepening of cross equatorial wind flow over south Arabian Sea during the next three to four days.
Consequently, fairly widespread rainfall is likely over Lakshadweep, Kerala and Coastal Karnataka. Thus conditions are becoming favourable for the onset of the monsoon over Kerala during next three to four days,'' the IMD said.
The Met office said with the strengthening of Westerly winds and development of convection over Bay of Bengal, Southwest Monsoon has further advanced into some more parts of South and Central Bay of Bengal and parts of northeast Bay of Bengal.
''The northern limit of Monsoon as on May 26 passes through five degree North Latitude and 83.0 degree East Longitude, 10.0 degree North Latitude and 84.0 degree East Longitude, 15.0 degree North Latitude and 87.0 degree East Longitude and 20.0 degree North Latitude and 93.0 degree East Longitude.
An off-shore trough extends from Karnataka to Kerala coast with an embedded low pressure area over Southeast and adjoining East-Central Arabian Sea. An east-west shear zone is also establishing over South Peninsula along nearly 10 degree North Latitude.