The National Oceanic and Atmospheric Administration [NOAA] has announced the long-predicted El Niño for this year has finally arrived. But it doesn't look quite like we thought it would.

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Despite last year's predictions that we could see a weather event that might rival the incredibly powerful El Niño of 17 years ago, the actual conditions we're seeing are surprisingly mild.

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NOAA describes the system as both "weak" and unlikely to have much immediate influence. Still, with researchers predicting that El Niño hanging around through the summer, there could be a few visible effects (like some extra rain) coming down the pipeline as the season continues.