What is the Polar Vortex?

Polar vortex blog announced ahead of cold winter – NBC 5 Dallas-Fort Worth

Colder days ahead with the Polar Vortex on the move, Local News

Polar Vortex Setting Up to Bring Cold Weather Back to Central US, Canada

What is the 'polar vortex'?

What is a polar vortex? Cold weather heads to Tennessee

The Polar Vortex is strengthening. Should we be concerned? – Weather News

Science Says: Get used to polar vortex outbreaks

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

What Is the Polar Vortex? NOAA SciJinks – All About Weather

Climate graphic of the week: Polar vortex sends Texas into deep freeze

The 'polar vortex' may appear in the US in January

The polar vortex has been disrupted. What does that bode?

Polar vortex 2021: Every US state will see below freezing temperatures over the next week

The polar vortex, facts and information

What is the 'polar vortex'?