A standard NA clipper is sliced bread with cold peanut butter. We had a week of the 'chocolate fountain' which was unusual, and poured down swirled air on us. A clipper is linear, where the Pacific air pulls down Arctic air. We can expect that to be cold and snowy. Strong clippers hold back the warm Gulf air.
Over in the Europe, it is still mixed with no clear air blobs. I haven't really followed Europe air patterns over the decades. In the past, when the Gulf Steam was a thing, the Gulf plumes hit higher and kept the Arctic ice back. Now, the plumes are hitting lower, allowing Arctic air.
Can we throw another lump of coal on the fire, Mr. Scrooge?