Science News
Early Polar Vortex Breakdown to Bring Cold Snap by Thanksgiving
An unusually early polar vortex breakdown is expected to send Arctic air into the U.S. around Thanksgiving, cutting across El Niño's warmer pattern.
El Niño
Science News
Polar Vortex Breaks Down Earlier Than Ever Recorded, Scientists Say
Scientists say the polar vortex broke down earlier than ever recorded, which could send Arctic air south and complicate the El Niño winter outlook.
Science News
Earliest Stratospheric Warming on Record Raises Dry-Winter Worry
A sudden stratospheric warming has arrived earlier than any in records back to the 1940s. A Reading meteorologist says drought, not snow, is the UK concern.
Earth
El Niño and La Niña Explained: What They Are and Why They Matter
A patch of ocean along the equator, thousands of miles wide, can shift rainfall in California and the Gulf Coast. Here is how the cycle works and where it stands now.