SYDNEY: An El Nino weather pattern this year appears almost certain, Australia's Bureau of Meteorology said yesterday in a revised forecast, raising the prospect of drought in Australia and an even weaker monsoon in India.

The odds for El Nino, an abnormal warming of the eastern Pacific Ocean that creates havoc in weather patterns across the Asia-Pacific region, had risen significantly since two weeks ago, when the bureau said there was a more than 50 percent chance.

"El Nino is a little bit like recession, you are in it before you can say you have one. If it continues as it is now, the historians will say the El Nino started in May," said David Jones, head of the bureau's climate analysis.