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 ...
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 ...
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