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 ...
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 ...
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