Southwest Monsoon has hit the coast of Kerala on Friday marking the start of the rainy season, four days after its normal onset date. Generally it hits the coast of Kerala on 1st June every year. This time it has missed the predicted date by IMD and has arrived four days later than its normal onset.
“Southwest Monsoon has set in over Kerala, on Friday, June 5, 2015 as against the normal date of June 1,” the Indian Meteorological Department (IMD) said.
“It has further advanced into entire south Arabian Sea, some more parts of Central Arabian Sea, entire Lakshadweep area and Kerela, some parts of coastal and southern interior Karnataka, Tamil Nadu, remaining parts of southeast Bay of Bengal and some parts of central and northeast Bay of Bengal,” it said.
The IMD added that conditions are favourable for further advance of Southwest Monsoon into some parts of Karnataka, Tamil Nadu, some more parts of Rayalaseema and coastal Andhra Pradesh, and northeast India in next 48 hours.
The southwestern summer monsoons occur from July through September. The El Nino, an event marked by warmer surface waters in the Pacific Ocean, increases the chance of droughts in the Asia-Pacific region, including Australia, Southeast Asia and India.
But private weather forecaster Skymet said monsoon will be good this year as the Indian Ocean Dipole (IOD) phenomenon counters an El Nino weather event. Thar Desert and adjoining areas of the northern and central Indian subcontinent heats up considerably during the hot summers. This causes a low pressure area over the northern and central Indian subcontinent. To fill this void, the moisture-laden winds from the Indian Ocean rush in to the subcontinent. These winds, rich in moisture, are drawn towards the Himalayas. The Himalayas act like a high wall, blocking the winds from passing into Central Asia, and forcing them to rise. As the clouds rise theirtemperature drops and precipitation occurs. Some areas of the subcontinent receive up to 10,000 mm (390 in) of rain annually.
The southwest monsoon is generally expected to begin around the beginning of June and fade away by the end of September. The moisture-laden winds on reaching the southernmost point of theIndian Peninsula, due to its topography, become divided into two parts: the Arabian Sea Branch and the Bay of Bengal Branch.
The MET department had initially predicted that this year the rainy season would make its fall on May 30 with “below normal” Monsoon, but later downgraded its forecast to “deficient” rainfall.
On June 2, IMD scaled down this year’s June to September monsoon rainfall forecast citing an El Nino weather pattern, raising fears of the first drought in six years. El Nino, an event marked by warmer surface waters in the Pacific Ocean, increases the chance of droughts in the Asia-Pacific region, including Australia, Southeast Asia and India.
But private weather forecaster Skymet said monsoon will be good this year as the Indian Ocean Dipole (IOD) phenomenon counters an El Nino weather event. Finance minister ArunJaitely has sought to allay fears over predictions of deficient monsoon saying conclusions on that basis either on inflation or some kind of distress situation are “far-fetched“.
He also said in the last 48 hours, ever since the IMD predicted deficient monsoon this year, the conclusions were being drawn up in an exaggerated manner and it was necessary to place the finance ministry’s view on the subject.
Dismissing the slide in the stock markets in last three days as not a trend, the Minister said revenue, especially indirect tax collections — a key indicator, has shown an impressive jump.
The southwest Mansoon plays crucial role in the agriculture products in India as the Khareef crop entirely depends upon the SW monsoon.