Here is the set up, with all images coming from the University of Maine, Climate Reanalyzer website: http://cci-reanalyzer.org/
February 2, 2014 colder temps were blocked over Siberia, while warm anomalies dominate the Arctic.
By February 5th, the flow of Siberian air over the Arctic commences.
By the 6th, a river of Siberian cold is bearing down on the Canadian Arctic, and beginning to flow south into Quebec.
One result will be more snow for the US, including significant snow and rain forecast for northern California as a low brings moisture into the Western US. Even more dramatic is the GFS forecast of a major snow and rain event in the Eastern by February 9, 2014 1200Z.