Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

High above the Arctic, scientists are tracking a major change in the atmosphere this January, an event similar to what triggered the deadly 2021 Texas freeze. That disaster killed more than 200 people ...

A winter storm descending on the US is expected to deliver heavy snow and ice to more than 150 million people across roughly ...

Strong winds, frigid temperatures, and snowfall moved across several states during the course of the last few days, and for ...

Sudden stratospheric warming is expected to keep a weakened vortex splintered, plunging the region back to record-breaking ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren’t going anywhere, as a major disruption to the Polar Vortex is coming this month.

Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.