El Nino and La Nina

El Niño and La Niña are parts of an oscillation in the ocean-atmosphere system (called the El Niño Southern Oscillation, or ENSO cycle) that can impact weather and climate conditions across the globe. El Niño features warmer-than-average temperatures in the waters of the equatorial Pacific Ocean, while La Niña features colder-than-average waters. Read our stories below on the latest ENSO conditions and research into how the cycle affects global weather patterns.
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El Niño Can Predict Tornado Season's Severity
Rope Tornado
March 16th, 2015
This year's El Niño may deliver a quiet tornado season.
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La Niña Events May Spike with Climate Change
A satellite image reveals cooler ocean waters near the equator in the Pacific.
January 26th, 2015
The weird weather phenomenon known as La Niña could occur nearly twice as often in the future as it does now, due to global warming, researchers say in a new study.
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2014 Will Be Earth's Hottest Year on Record, Despite US Cold
October global temperatures.
November 20th, 2014
Arctic storms could bury Buffalo under heaps of snow until Christmas and 2014 will still be the hottest year on Earth since 1880, climate scientists said today.
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After Much Ado, El Niño Officially Declared
warm Episode relationships map - summer, la nina, el nino
March 5th, 2015
A weak El Nino has finally emerged a year after its first signs of forming, but weather impacts will be muted.
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Odds of El Niño Fall to 58 Percent
November 6th, 2014
El Niño conditions continue to sputter in the tropical Pacific Ocean, pushing back the odds of even a weak El Niño emerging this winter, forecasters said today (Nov. 6).
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Where Is El Nino? And Why Do We Care?
Warm Episodes Relationships map, el nino
October 9th, 2014
El Niño still hasn't emerged, but forecasters give it a two-thirds chance of forming by the end of the year.
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Hot News: 2014 On Track to Become Warmest Year
Temperature difference chart, global warming
October 20th, 2014
The "odds are good" that 2014 will be the warmest year in the books, fueled by record ocean warmth.
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