Here is 2015. At 50mb, it's more near and just north of Siberia...not so much in Canada or over Hudson Bay. However, as Tombo noted a few days ago, you can see a big ridge in AK and the elongation favorable for cold air delivery. You don't have to have the strat PV sitting in Canada. That 50mb look would be fine.
Also note I am no expert...just sort of going by what makes sense to me.