Much of northern and northeast south dakota is about to go through the most severe cold wave in several years. Wind chill indicies are already below zero in parts of the north. Travis Tarver with the National Weather Service in Aberdeen says conditions will only deteriorate further.
Tarver warns, "We actually have a stronger surge of Arctic Air that's gonna move into the region tonight. And it'll kick up the winds a little bit, and by Thursday morning, that's when it looks like we're gonna be in the heart of this cold air.