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

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

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.

A blast of Arctic air is set to cover much of the United States with temperatures below freezing starting on Friday and into next week, impacting millions of Americans in nearly all of the contiguous states.

Here's a detailed forecast and timeline of when NYC will see snow on Sunday, how many inches to expect and what's forecast to happen when a polar vortex sweeps the area next week: WARNING: This story contains details of intimate partner violence and may affect those who have experienced it or know someone who has.