Another way we could get some help is an -epo block that happened in the middle of Jan. It was short lived so this plot has some noise, but we can see the cold air dumping into the CONUS. One pathway to this happening is the aleutian ridge pushing poleward through AK, which can occasionally happen in La Ninas.
The biggest irony is that this wasn’t driven by El Nino. This was the only 10 day period when the STJ all but quieted down this winter. If I remember correctly, the MJO was in 3 before this pattern aberration occurred (and went onto 4-6 driving record warmth after the two MA snows).
Your Jan 2022 scenario and this one are just about the best short-term wintery hits that we can hope for south of 40N in this coming winter, imo