As expected, La Niña petered out in April.
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.
NOAA meteorologists say there's no reason to fear severe hurricanes this summer and fall as a result of this spring's severe tornadoes.
A strengthening La Niña is expected to translate into another winter of extreme weather, according to U.S. forecasters.