Zipperfish Zipperfish:
30 degrees in Vancouver yesterday.
Oh, you haven't got the news about how the vortex works yet, I see.
You see it can be nice and sunny in Vancouver, but if it's cold in Calgary that's because a lot of ice melted in 2012 so that accounts for any unseasonable cold weather anywhere, ever.
Well, it is only supposed to happen late winter, early spring, and the summer minimum for ice melt looks like it ended weeks early this year (got cold early you see), but doesn't matter.
The Polar Vortex is magical. You don't even have to understand it. You just need to know the magic words - Vortex, Jets, Waves. Say those and you never have to wonder again why it got cold all of a sudden no matter where you are in the Northern Hemisphere.
Wanna know why? There was a study.

(Well actually there was a bunch of them, but the one that we like with the melty ice in 2012 got mentioned by the CBC, so that's the only one that matters)