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

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing ...

New York’s being hit by an arctic polar vortex, making temperatures drop hard overnight after a snow storm hit on Sunday.

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 ...

Winter is making its presence known in New York City, as the polar vortex is bringing brutally cold temperatures to the ...

The vortex creates milder weather across northern latitudes ... and climate regulation. The extreme cold temperatures from a weakened polar vortex, although seasonal and cyclical in nature ...

MINNEAPOLIS, Minnesota — Our entire region is under an Extreme Cold Weather Warning until 12 p.m. Tuesday; wind chills could fall as low as -45 degrees. This Arctic blast is thanks to a polar vortex.

Answers as to why these strange temperatures and weather events are prevalent may be found in the polar vortex. The polar vortex is a large area of low pressure and cold air surrounding both of ...

“If the polar vortex is left alone ... develop particularly large meanders along its path, allowing brutally cold weather to sneak farther south than usual. This was a factor in February ...