While a storm sweeps through the Midwest into the Northeast early this week and another storm begins its journey along the southern tier of the nation, the stage will become set for arctic air to blast southward across the Plains.

Following an unusually chilly weekend on the northern Plains, the core of the cold will take aim at the region on Tuesday. Highs in the 20s today and on Monday will be replaced by temperatures in the teens and even the single digits for some. After the initial plunge, temperatures will hover as much as 10 to 15 degrees colder than normal in cities including Fargo, Omaha, Minneapolis and Chicago by midweek.

Story by AccuWeather.com Meteorologist Katie Storbeck.