Triple polar vortex sends temperatures plunging in central and eastern U.S. as 1st Arctic cold blast moves in YahooCold Weather Forecast to Bring Chilliest Temperatures of the Season The New York TimesA ‘triple dip polar vortex’ is coming. Will Colorado be affected? The ColoradoanArctic blast hits CT, making Friday the coldest day since February. Here’s when the cold eases up CT InsiderIowa weather: Another round of measurable snow this weekend KCCI