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"Polar vortex" creating buzz again this January
The Polar Vortex explained
Why Does the Polar Vortex Come South to Philly? Explained in 5 Steps | NBC10 Philadelphia
The Polar Vortex Collaps - January 2021
What do these headlines about the Polar Vortex mean?
What is the polar vortex?
Polar vortex appears to be on the move
Upcoming Polar Vortex?
Wednesday Evening: A little Polar Vortex Tutorial
What is the polar vortex?
What Is A Polar Vortex?
Development of a polar vortex at the beginning of February 2020
