Something we are worried about has, and is still, this PV rebuilding over Alaska. That is looking the case to happen-
This rebuilding PV will not help along the snowy weather at all- more of a step backwards, if anything. What is still somewhat reassuring is how we see a jab of low PV values jutting right into the higher PV values, just to the right of the white circle (North Pole). That indicates that a ridge will be in place, helping to keep the stick in the gears, so to say, to keep the polar vortex from completely reforming.
If you have any questions about potential vorticity, because it is a complicated topic, you can ask below and we will try to answer them the best we can, because even I am still learning about it.