What is a polar vortex and what does it mean to state the 'polar vortex ' is collapsing and weakening? - Quora
Polar vortex explained: Arctic air, cold weather, freezing temperature
Polar vortex | Meteorology, Climate Change, Arctic Weather | Britannica
A Sudden Stratospheric Warming is coming, collapsing the Polar Vortex and potentially impacting the weather in late-month and early Spring » Severe Weather Europe
N.J. weather: What is the polar vortex, and could it boost our snow chances? - nj.com