Globally, it was the fourth-warmest April on record, but for the oceans, it was record warm.
Things are heating up in the tropical Pacific! Our blogger explains how this might be a sign that El Niño is right around the corner.
Monthly and year-to-date climate highlights from NOAA National Centers for Environmental Information.
It’s springtime! Here’s why ENSO forecasters would rather skip the forecast even when a potentially significant El Niño appears to be developing.
There's a 50-60 percent chance of a much warmer than average May in parts of the Pacific Northwest, and a 50-60 percent chance of a much wetter than average May in parts of California.
With a 62% chance that El Niño conditions will develop by May–July, NOAA is issuing an El Niño Watch.
NOAA's network of moored buoys in the tropical Pacific is getting an upgrade that will help scientists better understand and predict El Niño and La Nina.
NOAA predicts moderate to major spring flooding along the upper Mississippi River from Minneapolis to St. Louis.
More often than not, La Niña brings dry winters to the U.S. Southwest. Was there something unusual about our current La Niña that would explain why the area got soaked instead?
Poster-sized collection of global temperature maps since 1850 makes it easy to spot the influence of global warming.