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A Market-Roiling La Nina Is Dividing World Weather Forecasters

  • Weak Pacific trends leave lots of room for interpretation
  • Every nation has a different way to measure the beginning
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Photographer: Valery Hache/AFP via Getty Images

A meteorological clash of nations is confounding the world’s commodity markets.

Global weather agencies can’t agree on whether to expect a La Nina event in coming months. The U.S. has backed off its prediction, Australia remains watchful, while Japan has decided La Nina is already here. Disagreements arise because each nation has different standards for measuring the weather.