With the warm November we had, then a quick snow early in the month of December which in turn insulated the warm soil, even with two periods of very cold temperatures the frost depth in North Dakota and northwestern Minnesota is very shallow. In fact, there are some locations in the region where the ground has only frozen to a couple of inches. There are widespread areas with the frost depth is only 3-4 inches deep. Most years by this time the frost depth would be one to two feet deep, but there are only a few areas around with such frost. This will likely mean an early release of the frost in the spring.