As I mentioned last week, the #PolarVortex is expected to become disturbed during early-to-mid November with a building Aleutian High in the stratosphere seeking to displace the vortex. Probabilities for cold air outbreaks for December on the rise for much of the NH. pic.twitter.com/WDH8cqhkpQ

— Jason Furtado (@wxjay) October 30, 2018