A lobe of the polarvortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward into the UnitedStates this weekend into next week. Polar air ...
The polarvortex -itself- is nothing new. It doesn't *hit* you. Rather, pieces of it can break off and send colder air into parts of the UnitedStates. Think of the atmosphere like a cake - it ...
the polarvortex can sometimes get out of balance. When it wobbles or weakens, chunks of that super cold air can spill out and slide south, making places like the UnitedStates suddenly feel ...
When there are disturbances in which the Jet Stream weakens, it can become wobbly. This allows the cold air to plunge southwards. A disrupted polar vortex does not happen every year. Very much so what ...