IMD: Oct-Dec rainfall to be above normal, after 108% in June-September

“The seasonal rainfall southeastern peninsular India volition beryllium 112 percent of the Long Period Average of 334.13mm implicit during October – December,” Mrutyunjay Mohapatra, manager general, IMD, astatine the clip of issuing the forecast for the post-monsoon season.

Also known arsenic wintertime monsoon, rainfall during the past 4th of the calendar twelvemonth is predominant implicit Rayalaseema, Yanam, coastal Andhra Pradesh, Puducherry, Tamil Nadu, Kerala and southbound interior Karnataka. For Tamil Nadu, this is the main rainfall season, wherein the state’s large rainfall of the twelvemonth is recorded.

However, with the impending La Nina conditions emerging on the equatorial Pacific Ocean, determination could beryllium beneath mean rainfall implicit Tamil Nadu and Puducherry during the upcoming season. La Nina is known to suppress the northeast monsoon implicit India.

“During La Nina years, Tamil Nadu and Puducherry person beneath mean rainfall,” added the IMD chief.

However, with the Indian Ocean Dipole, which is the counterpart of the El Nino Southern Oscillation from the Pacific Ocean, apt to stay neutral during the upcoming weeks, the northeast monsoon’s show volition mostly beryllium connected the intra-seasonal developments, the IMD officials said.

The southwest monsoon withdrawal is apt to prime up gait during the adjacent fewer days and rainfall cessation from implicit northwest and bluish India is imminent. The extended scope forecast issued by the IMD suggested that the northeast monsoon onset could beryllium connected clip this year. The mean day for the onset is astir October 15 with a modular deviation of astir 4 days.

Over the country, October volition proceed to stay a rainy month, the IMD has forecast. The all-India rainfall during this period has been forecast to beryllium 115 per cent of the Long Period Average of 75.4mm. ‘Above’ mean rainfall volition lash a bulk of the geographical regions spanning cardinal and peninsular India, Uttar Pradesh and neighbourhood areas. October could beryllium adust implicit Jammu and Kashmir and eastbound India region.

Both time and nighttime temperatures are acceptable to soar implicit the northeast region, Jammu and Kashmir, West Bengal, Odisha, Gujarat and Rajasthan, Punjab.