However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to nearly 300 million Americans starting this weekend. Maps show where and when the cold front will arrive.

According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need to know.

A polar vortex will plunge Colorado into bitter, sub-zero cold this weekend and could bring up to 10 inches of snow in some parts of the Denver metro, National Weather Service meteorologists say. We’ve rounded up all of our arctic cold coverage below,