Comment on Polar vortex threatens extreme cold in the Northeast - UPI.com

UPI.comPolar vortex threatens extreme cold in the NortheastUPI.comWASHINGTON, Feb. 13 (UPI) -- A blast of Arctic air is set to make its way across the Northeast United States causing severe wind chill that may lead to below freezing temperatures. The National Weather Service declared the pattern "the coldest air mass ...Polar Vortex Triggers Subzero Temperatures, 'Life-Threatening' Wind ChillNBCNews.com'Polar vortex' drives bitter cold into central, eastern U.S.WKYC-TVPolar Vortex Brings Extreme Wind Chill to Midwest, NortheastNBC 6 South FloridaFusion -Today.comall 56 news articles »