How a polar vortex will cause temperature swings in parts of Canada
How a polar vortex may cause several cold outbreaks in December
CTV National News: Cooler temperatures and heavy snowfall set to hit parts of Ontario and Quebec
Snowfall leads to hundreds of crashes in Calgary
CTV National News: Heavy snowfall temporarily shuts down Calgary International Airport
Snowy conditions in the west, wet snow and freezing rain heading to eastern Canada
