From Accuweather.com:
Rest assured folks, it's darn cold up north! In far northern Canada, the temperature dipped to 13 below this morning. It's too early for any cold that harsh across the lower 48 states, but there will be a significant change to colder weather across the country next week. Places across the northern Plains and Upper Midwest that have had highs in the 60s and 70s recently will suddenly experience daytime highs in the 30s and 40s and overnight lows in the 20s. The change to colder will be produced by a dramatic southward shift of the jet stream as shown above. Story by AccuWeather.com Expert Senior Meteorologist John Kocet.
For the record, I am opposed to the cold. Never liked it, never will.