Upcoming cyclonic storm,'Biparjoy', has intensified due to deep depression caused over the Southeast Arabian Sea.

On Tuesday evening, the Meteorological Department of India(IMD) said, a new cyclonic storm,' Biparjoy' has intensified into a deep depression over the Southeast Arabian Sea. Bangladesh has given the name 'Biporjoy' .

Impact of Low-Pressure System on Monsoon Onset in Kerala

"The deep depression  caused over southeast and adjoining east-central Arabian Sea moved nearly northwards with a speed of 4 kmph, has now intensified into a cyclonic storm 'Biparjoy'. It may move towards northwards and turn slowly into a very severe cyclonic storm in next 12 hours and travel towards north to Northwest till it's landfall on Pakistan.

Obstruction to Monsoon Progression and Rainfall Distribution

Sea conditions are likely to be very high along and off the Kerala-Karnataka coasts and Lakshadweep-Maldives areas on June 6 and Konkan-Goa-Maharashtra coasts from June 8 to June 10. Fishermen out at sea have been advised to return to the coast.

The formation of the low-pressure system over the southeast Arabian Sea is expected to significantly  influence the advent of the monsoon on the Kerala coast. The monsoon onset over Kerala will be  a meek and mild one. It is expected to happen on June 8 or June 9.

The advancement of the monsoon deep inland has been obstructed by this depression created in the Arabian Sea. Hence , the monsoon winds may reach coastal parts but will struggle to reach beyond the Western Ghats. As a result of the cyclonic storm and a low pressure created in the Bay of Bengal, the southern peninsula will  also get rain.

Delayed Monsoon Arrival in Kerala and its Implications

The southwest monsoon generally sets in over Kerala on June 1 with a diversion of about seven days. In mid-May, the  (IMD) said monsoon might arrive in Kerala by June. Scientists said that delayed onset of monsoon over Kerala does not mean that the monsoon will reach other parts of the country late.

Normal Rainfall Predictions Despite El Nino Conditions

Despite the emergence of the El Nino conditions India is expected to get normal rainfall during the southwest monsoon season. The Northwest India  will receive normal to below-normal rainfall. East and northeast, central, and south peninsula might receive normal rainfall at 94-106 per cent of the long-period of 87 centimetres in average.