An Arctic air mass that has gripped much of the northern half of the U.S. is expected to arrive overnight Monday in North Texas, bringing with it below-freezing temperatures, bitterly cold weather and the chance later in the week for the possibility of a wintry mix of precipitation,

There is now a 60-70% chance that our entire forecast area observes at least measurable snowfall,” the National Weather Service in Fort Worth said Sunday.

Chances are rising that snow and freezing rain are coming at the end of several days of extreme cold in Dallas-Fort Worth. An intense winter storm is moving into the region Sunday, with wind chills expected to drop into the low teens overnight.