A cold front from an expanding polar vortex brought chilly temperatures to North and Central Florida. Temperatures are ...

Solar activity could cause stronger-than-usual auroras, making the northern lights visible in more U.S. regions than usual.

Snowpiles stretch across highways before sunrise, headlights pushing through swirling flakes as plows carve narrow lanes ...

A strong geomagnetic storm could push the northern lights much farther south than usual, putting on a celestial show for ...

Frigid Arctic air is pushing south into the United States, and fortunately, it doesn’t look like freezing temperatures will ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

Temperatures across Indiana are set to be even colder tonight, as temperatures plunge into single digits and at the zero mark, with wind chills dipping well below zero.

Temperatures across Michigan are forecast to plunge to the some of the coldest in the U.S., dipping well below zero in place ...

Arctic air is taking cold to another level this week and the US could be facing bouts of it well into December thanks to the polar vortex.

The relentless early-season cold isn't letting up, as another shot of frigid temperatures is set to plunge into the country.

Several inches of snow are expected to fall on Dec. 2 in the Northeast and Mid-Atlantic, with freezing rain and iced-over roads in some areas.

Polar vortex disturbance is causing frigid Artic air to surge southward, bringing cold temperatures and possibly snow to many ...