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.

Polar Vortex Could Bring Severe Winter Weather to the U.S.

Powerful Midwest blizzard to usher in polar vortex cold snap

Polar vortex shifting due to climate change, extending winter, study finds - The Washington Post

Arctic blast tied to polar vortex to test Texas grid again

Polar vortex expert says another arctic blast has a 'good chance' of happeneing in February

Polar vortex expert says another arctic blast has a 'good chance' of happeneing in February

N.J. weather: What is the polar vortex, and could it boost our snow chances?

Climate change: Why we still have extreme cold despite global warming

How 'topsy turvy' polar vortex brought record freeze to Texas

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

What's a polar vortex? - Vox

Another Big Winter Storm Brings Polar Vortex to US This Week

Disrupted polar vortex unleashing colder weather in eastern U.S. - The Washington Post

Remarkable Polar Vortex Could Send Temps Plummeting Again — Best Life