Winter is flexing its muscles early this year. A major pattern shift in late November ushered in frigid temperatures and a powerful snowstorm that dumped 6 to 16 inches of snow across large sections of the Northern Plains and Midwest-including Iowa, Illinois, southern Wisconsin, and Michigan. This was just the beginning.

According to DTN meteorologist John Baranick, the current setup will allow multiple reinforcing waves of cold air to descend from Canada throughout the first week of December. These arctic surges will bring additional snowfall, particularly across the Great Lakes and High Plains, where upslope flow is expected to generate moderate to heavy accumulations from Alberta down into New Mexico.

Behind each front, temperatures will plunge. The coldest air of the week is forecast to settle across the Midwest by Thursday, with lows below zero in the eastern Dakotas, Minnesota, Iowa, Wisconsin, and northern Illinois. Highs may struggle to exceed 10°F, especially in areas still covered by deep snow and under calm winds-ideal conditions for significant overnight cooling.

A new low-pressure system is expected to form along the advancing cold front near the Gulf of Mexico by Thursday. While much of the Southeast will be too warm for snow, light snow or mixed precipitation is possible in the Tennessee Valley and Mid-Atlantic on December 5.

Another Canadian system will dip into the U.S. late Thursday into Friday, dragging yet another blast of arctic air across the North-Central U.S. and leaving behind a stalled cold front across the Upper Midwest. This boundary could fuel another moderate snow event over the weekend, followed by yet another cold outbreak.

Some temporary moderation in temperatures is expected by early next week as the upper-level pattern adjusts, cutting off the deep flow of Arctic air. While this may allow temperatures to rise above normal across parts of the Plains, the Midwest and Northeast will still experience below-average readings in the wake of additional clipper systems.

However, the reprieve may be short-lived. Forecasters are already eyeing another potential major winter storm for mid-December, which could reload the region with cold and snow.