The pattern change across eastern North America from today to Friday is phenomenal, notably so from the Southeast to the Lakes but especially so over the Canadian Maritimes. 500mb anomalies there shift from ~250m below normal today to something off the charts late Friday. Also note how the western Atlantic ridges flexes once again, as we've seen time and time again in 2018. Positive temperature anomalies will also be impressive, and it is likely that record warmth will occur in parts o