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. Here's the forecast.

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march ...

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 ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

Frigid temperatures are expected to impact much of the central and eastern United States in the coming weeks. The first of three polar vortex systems is expected this month, according to AccuWeather.

WASHINGTON — A pattern flip that could send extreme cold air spilling into the region this winter may take shape. The polar vortex, which traps cold air near the North Pole, may experience a ...

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. Here's the forecast.