Polar vortex: Temperatures 'getting dramatically warmer' as cold spell thaws
Wednesday, January 8, 2014 - 06:00
in Earth & Climate
The brutally cold "polar vortex" that plunged millions of Americans into a deep freeze was easing Wednesday -- but temperatures remained between 10 and 20 degrees below seasonal averages.The weather system was receding north, having set new record low temperatures in 50 cities on Tuesday.