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LATEST NEWS UPDATES | Monsoon ‘most likely' to be normal, says IMD

Monsoon ‘most likely' to be normal, says IMD

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published Published on Apr 27, 2012   modified Modified on Apr 27, 2012
-The Hindu

The India Meteorological Department announced on Thursday that the coming monsoon would “mostly likely” be normal. The average rainfall would be 99 per cent of the long period average [LPA], with a model error of plus or minus five per cent.

There was a 47 per cent probability of the rainfall being between 96 per cent and 104 per cent, 24 per cent probability of its being between 90 and 96 per cent, 17 per cent probability that it would be between 104 and 110 per cent, 8 per cent probability that it would be below 90 per cent and 4 per cent probability of its being above 110 per cent of the LPA.

In other words, rainfall is likely to be between 94 per cent and 104 per cent of the LPA, with a greater possibility of its being near the lower end of the band rather than the upper end.

A press release issued at a briefing noted that recent forecasts from international and national agencies indicated that there was a probability for the emergence of a weak El Nino condition during the later part of the season and the development of a weak negative Indian Ocean Dipole event during the second half of the year.If these came true, they could have an adverse impact on the rainfall at the tail-end of the season.

The forecasts come close on the heels of a conference of national and international weather experts organised by IMD under the aegis of the World Meteorological Organisation at Pune on April 19 and 20.A statement issued at the end of the meet, which looked at the likely monsoon scenario for the south Asia region, also predicted that rainfall during the season was most likely to be within the normal range, but that there was a “slight tendency” to be below normal.

The statement noted that in terms of spatial distribution, there was a likelihood of below normal rainfall over some areas of north-western and southern parts of South Asia, while being close to the long-period average over the remaining parts.

The Secretary of Ministry of Earth Sciences, Shailesh Nayak, declined to comment on the forecast made by the experts at the meet of the possibility of below normal rainfall in the south and northwest parts of the region, which corresponds to Tamil Nadu and other parts of the southern peninsular region and Rajasthan and other parts of northwest India, apart from Sri Lanka and some parts of Pakistan.

“That was a climate forecast for the South Asian region as a whole. The forecast we are making now is for India,” Mr. Nayak said.

He also noted that the forecast for different regions of the country would be made in June along with an update for the all-India rainfall forecast and month-wise forecasts for July and August.

“With the data available at the moment, only a long-term forecast for the country in its entirety and a season as a whole can be made now. One would have to wait till mid-June to make region-wise forecasts,” he added.

The IMD release noted that the forecast was being made following a detailed analysis of the various global parameters that are considered to have an influence on Indian monsoon.

It has also taken into account forecasts made by international institutions, including the WMO's Lead Centre for Long Range Forecast-Multi-Model Ensemble, the United State's National Centers for Environmental Prediction, the U.K.'s Meteorological office, the European Centre for Medium Range Weather Forecasts, the Japan Meteorological Agency, and the Asian-Pacific Economic Cooperation Climate Centre in Korea as also national institutions such as the Space Applications Centre, Ahmedabad, the Indian Institute of Tropical Meteorology, Pune, and CSIR's Centre for Mathematical Modelling and Computer Simulation, Bangalore.

The Hindu, 27 April, 2012, http://www.thehindu.com/todays-paper/tp-national/article3358897.ece


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