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

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the North Pole. Real feel temperatures throughout the northeast, including ...

After this weekend's snow storm moves out, cold Arctic air will move in.

The polar vortex has broken, and severe temperatures are set to dominate most of the country in the coming days. Temperatures in the 10s are forecast for much of the Northeast, and subzero ...

An unusually strong disruption in the upper atmosphere is setting the stage for a winter pattern that could lock much of the United States into bitter, prolonged cold. Forecasters are tracking a polar ...