The middle of the country is experiencing a bit of a temperature renaissance, but after a Clipper moving through the western Great Lakes will pull some cold air behind it, and that’s essentially the pattern for about 10 days. Mostly cold, followed by some bouts of warm weather, shortly trailed by a burst of snow and more cold air.
There is a blocking pattern over Alaska right now, which is part of the reason that the Continental US has been able to avoid big systems for a week or so. More relevant is that the wave pattern across the middle latitudes is fairly static. Here is the upper level chart at the GFS initial time:
The big difference between the current chart and the one from a weak from now is the absence of that arch over the Bering Strait.
The other components, like the strong jet over the western Pacific, a ridge in the eastern Pacific and a general trough through the eastern part of the country remain the same. That’s not a recipe for a fungible weather pattern.
With a fairly consistent upper level stream over the center of the country, don’t be surprised if there are a few more busts of snow this week in the Western Great Lakes. The rest of the country should think about getting comfortable with their weather for a little while.