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 Brings Wet Summer to Plains; Western Drought Continues
forecast
May 21st, 2015
The West can expect its warm and dry weather to continue through the summer, while the central Plains will be relatively cool and wet.
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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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2015 Already Setting Heat Records
global temperature
April 17th, 2015
The first three months of 2015 set new global heat records.
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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
SSTs
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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'Warm Blob' in Pacific Ocean to Blame for Wonky US Weather
warm blob image plot
April 10th, 2015
A warm blob of water squished into a patch in the Pacific Ocean may be to blame for the weird weather the United States has experienced this year.
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