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A polar vortex from Siberia could hit Canada with extreme cold
The Polar Vortex.winters coldest wrath
What is a polar vortex and what does it mean to state the 'polar vortex ' is collapsing and weakening? - Quora
Polar vortex-type cold wave could freeze parts of U.S. next week
Rochester NY Weather: How will polar vortex, bomb cyclone impact us?
Cooking up a stratospheric polar vortex disruption
Polar Vortex to bring colder, more stormy weather to Toronto this month
The Polar Vortex pays a visit
Irish caught in polar vortex: 'I felt my eyeballs freezing' – The Irish Times
Sudden stratospheric warming, polar vortex disruption could mean colder weather for eastern US
Frostquakes and thundersnow: Absurd winter weather beyond the polar vortex
Northeast snow this weekend, a big, complex storm next week, and what's the deal with the polar vortex? – The Eyewall
Polar Vortex could bring extreme cold and snow to Toronto this winter - Indie88