Nina elle 2017 - El Niño & La Niña (El Niño

Here is a description of the categories and criteria they use.

These changes disrupt the large-scale air movements in the tropics, triggering a cascade of global side effects.

Neither El Niño nor La Niña are observed or expected in coming 6 months.

The pattern shifts back and forth irregularly every two to seven years, and each phase triggers predictable disruptions of temperature, precipitation.

During La Niña winters, the southern tier of the United States is often drier than normal.

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