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El Niño

El Niño is a weather phenomenon that involves a warming of the Pacific Ocean west of Peru.

A strong El Niño is often associated with flooding rains and warm weather in Peru, drought in Indonesia, Africa, and Australia, torrential downpours and mudslides in southern California, a mild winter in the northeast, and fewer hurricanes in the southeast. Keep in mind that these effects aren't guaranteed, but an El Niño makes these conditions more likely to happen.

El Niños occur irregularly approximately every two to seven years. Warm water generally appears off the coast of South America close to Christmas, and reaches its peak warmth in the eastern Pacific during the late fall of the following year. After peaking, the waters will tend to cool slowly through the winter and spring of the next year. Effects can be felt continually around the globe for more than a year, though this is generally not the case in any one place.

NOAA El Niño Introduction

NOAA’s El Niño Portal

El Niño Update