
If you take a look at Fort Yukon, AK's temperatures for the month you can see that the very cold air arrived around the 23rd and is still holding on strong:

Now in Colville Lake, NWT you can see it bled in 3 days later on the 26th:

You can also see the same thing in Little Chicago, NWT:

So does this mean anything? There is no question to me that the very cold arctic air is now on the move and is now no longer confined to Alaska. It is now in Western Canada.
Is this a sign?
EDIT: I should also add that the NWT Hasn't really been _that_ cold compared to Alaska until the past few days, wheres Alaska has had at least one other decent cold spell earlier in the month.