How the polar vortex could deliver one last blast of wintry weather - The Washington Post

A disruption of the vortex could set off a chain reaction reversing the mild weather pattern in a few weeks.

What's a polar vortex? - Vox

Last Punch From the Polar Vortex Before Return to Warm Winter Weather

The polar vortex is splitting in two, which may lead to weeks of wild winter weather

Polar Vortex forecast shows winter is 'heading for the exits'

What a 'wrecked' polar vortex means for winter-starved Americans - The Washington Post

New Orleans Northshore Southshore winter weather hard freeze

Making sense of the polar vortex and record cold on a feverish planet - The Washington Post

Deadly cold overspreads US with freezing temperatures felt from border to border

Polar vortex to send arctic blast deep into US later this week

How the polar vortex could deliver one last blast of wintry weather - The Washington Post

How does the polar vortex lead to Arctic outbreaks?

Is the polar vortex back? Be afraid, frigid friends. - The Washington Post