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Fair chance of weak weather-shifting La Nina pattern in final quarter

Fair chance of weak weather-shifting La Nina pattern in final quarter
From Reuters - October 5, 2017

GENEVA (Reuters) - A weak La Nina pattern, possibly affecting weather and rainfall over large parts of the world, may develop and cool the Pacific Ocean in the final quarter of this year, the World Meteorological Organization (WMO) said on Thursday.

La Nina, which can cause floods and droughts, has a 50 to 55 percent probability of emerging in the period, the U.N. agency said in a forecast based on climate models from leading prediction centers worldwide.

The La Nina event, if it does occur, will likely remain weak, the Geneva-based WMO said in a statement, noting that a La Nina event occurred last year.

La Nina is the opposite phase of El Nino in the interplay between the atmosphere and ocean over the tropical Pacific, collectively known as the El Nino/Southern Oscillation (ENSO).

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