As the warmer air moved N, the Polar Vortex was squeezed S, like a watermelon seed between thumb and forefinger
https://climatereanalyzer.org/wx_frames/gfs/ds/gfs_nh-sat1_t2anom_1-day.png
The map above is the Temperature anomalies, here is the raw data:
https://climatereanalyzer.org/wx_frames/gfs/ds/gfs_nh-sat1_t2_1-day.png
Don’t rely on the White House Twitter Weather Report.