A deep trough over the Southwest, Great Basin, and Plains will keep conditions below to much below normal across the western 2/3rds of the U.S. into the new year. Wind Chill Advisories are up for the Northern Plains where wind chills could reach 35 degrees below zero tonight. pic.twitter.com/56NZAefE8d

— NWS (@NWS) December 28, 2018