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La Nina’s Demise Means Predicting Summer Weather Just Got Harder

  • Pacific returns to its neutral state, El Nino could come later
  • Ocean cooling and warming affects temperatures, rainfall
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Photographer: Richard Newstead/Getty Images

With the end of a Pacific La Nina and no clear signal of where ocean temperatures are heading, predicting spring and summer weather that will impact agriculture and energy markets just got a little harder.

A weak La Nina, which starts when the equatorial Pacific cools, has ended, the U.S. Climate Prediction Center said in a report Thursday. With its collapse, the U.S. raised the odds that a El Nino could form by the end of 2017 to 50 percent from 36 percent, though the agency has yet to issue a watch for the ocean-warming phenomenon.