So that is indicative of a SSW causing a weakening and disruption of the PV? I was under the impression that even SSWs that do occur doesn't necessarily displace a lobe of the PV into North America. Sometimes it dislodges it into Asia or Europe.
Interesting graphic showing how lame even last winter was for a large portion of the subforum even compared to this year up to this point. Last Feb. southern half of LOT to DTW cashed in to offset those deficits.
Despite the outlier NW 12Z GFS track; main snows still stay SE from Central IL over to DTW. As Euro seems fairly locked in will go 1.5" far NW, 2-3" downtown and southside, 5" Kankakee