“The expected large scale pattern evolution from the weekend into the middle of next week remains on track. Guidance consensus shows flat mean flow as of early Saturday steadily becoming more amplified as a deepening upper trough heads into the eastern U.S., downstream from a Pacific upper ridge that reaches western Canada and the northwestern U.S. by Monday. Within the eastern trough, some models continue to show an upper low closing off and taking a path somewhere within an area from the Great Lakes/southern Canada into New England, supporting at least moderately strong southern Canada into Northeast U.S. low pressure, which could undergo some redevelopment during the overall system’s life span. This storm remains a prominent weather focus due to its timing right before Thanksgiving” says an NOAA advisory bulletin.