SHARE THIS VIDEO —
What's All of This Talk About the Polar Vortex?
NBC's Al Roker debunks some of the myths behind the recently popular polar vortex.
we and our partners use cookies on this site to improve our service, perform analytics, personalize advertising, measure advertising performance, and remember website preferences. by using the site, you consent to these cookies. for more information on cookies including how to manage your consent visit our cookie policy.