Everybody has been smiling, saying that we can take this type of weather. Well, that comes to an end, now that the North Pacific plumes are hitting high again. You can see how it hits the Yukon and then drags down the Arctic air. However, this new pattern may not hold, as the North Pacific current looks weak. We might just have a short cold spell, as before.
These plumes of hot, moist air are driven by the big northerly ocean currents, as is all our weather. Nothing is very stable right now.