A polar vortex, a massive pocket of frigid air that ... temps south and impact up to 40 states across the U.S., including Delaware, meteorologists with AccuWeather said. The National Weather ...

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

Thanks to the polar vortex, it feels like one, too. Why is it so cold? The Philadelphia region was hammered Monday by the season’s first big storm, with some areas in Delaware and the lower ...

Christmas has passed, but the weather outside is still frightful. A snowstorm hit Delaware last week and was followed by a polar vortex dropping freezing temperatures in the region. The weather isn't ...

A blast of arctic air from Canada has brought the season's coldest weather to most of the United States. The system, known as ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not ...

That will be followed by a polar vortex that will cause temperatures ... and impact up to 40 states across the U.S., including Delaware, meteorologists with AccuWeather said.

A new year brings a new winter storm for Delaware and other parts of the U.S. that likely ... That will be followed by a polar vortex that will cause temperatures to drop next week. With the season's ...