The El Niño Southern Oscillation (ENSO) is a natural pattern of ocean and atmospheric changes in the tropical Pacific Ocean that can influence the weather pattern ...

NOAA is to start using a new index, known as 'RONI,' to classify El Niño and La Niña events.

The El Niño-Southern Oscillation (ENSO), the most prominent interannual climate variability signal, has been widely studied for its teleconnections with Antarctic sea ice variability. However, its ...

One expert says 2027 could be even hotter than the last three years, which have been the top three warmest on record ...

The tools scientists have relied on for decades to track El Niño and La Niña are breaking down, and the reason is ...

Two major weather agencies think it's increasingly likely that El Niño will form in the eastern tropical Pacific Ocean later ...

The upper panel illustrates how ENSO influences the equatorial Atlantic and Indian Oceans, and how these two ocean basins in turn feed back to ENSO. On the right side of the panel, the schematic shows ...

The latest forecast indicates La Niña conditions could return just in time for winter despite El Niño-Southern Oscillation-neutral conditions well past the end of summer, according to the National ...

NOAA’s latest climate update about one of the biggest drivers for this spring and summer is here.

El Niño–Southern Oscillation (ENSO) is a coupled ocean–atmosphere phenomenon centered in the tropical Pacific, characterized by quasi-periodic fluctuations between warm (El Niño), cold (La Niña), and ...