Matt Gagnon and Joe Lundberg discuss an upcoming cold front that will bring subzero temperatures and potentially break a record set in 1886. By morning, temperatures will be in the single digits, with some areas below zero. The forecast includes intermittent snow showers and persistent cold weather through mid-December, with highs in the low 20s. Lundberg predicts a white Christmas is likely due to the current snow cover. The cold weather is attributed to arctic air from Western Canada and Alaska, which will persist for the next 10 days.