The U.S. is set to feel the impacts of an Arctic polar vortex next week, meteorologists have warned, with sub-zero temperatures possible across much of the country. Meteorologists explained that polar vortex intrusions are usually not disruptive,

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point on America’s winter of repeated polar vortex invasions starting this weeken

Threat level: The Arctic air is likely to send temperatures plunging to at least 30 degrees below average for mid-February across the Midwest and Plains states, with the cold moderating some as it barrels east through late week.