A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.

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

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

A lobe of the Polar Vortex is going to swing through Ontario just north of Michigan. The upper-air forecast gives us an easy look at this strong winter player. The general meaning of the Polar ...

A polar vortex is bringing arctic air into the country next week. Forecast maps show when freezing temperatures will sweep ...

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 seen ...

A polar vortex over southern Ontario means Waterloo region, Guelph and Wellington County will experience very cold ...

A polar vortex is currently hitting the United States ... According to the Windy weather map, temperatures are currently freezing or below in most of the United States, with the coldest ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...