Shot of Cold Air Across the North

A punch of Arctic air will push across the northern tier of the nation the next few days. Temperatures will tumble to below average levels this weekend into early next week. The jet stream will dive southward from Canada, bringing the cold air. The mercury will plunge 10 to 20 degrees from today (Thursday) into Friday as a cold front drops southward through the Upper Midwest and Great Lakes. Readings will stay colder than normal through this weekend and into early next week. The cold air will reach the Northeast later this weekend. Temperatures will remain below normal through the middle of next week from the Northern Plains to New England