"Arctic Blast to Bring Record Low Temperatures Across the US"

The polar vortex is set to bring an arctic blast into the US, resulting in the coldest temperatures felt so far this winter, with weekend temperatures potentially dropping 30-50 degrees below average and wind chills approaching -50 degrees in some places. The mild winter has been attributed to El Niño, but a sudden stratospheric warming event in the Arctic is causing the polar vortex to wobble, allowing cold air to move south. The duration of the extreme cold remains uncertain, but there are indications that the minor warming in the stratosphere may reinforce colder weather patterns in some areas over the next couple of weeks.