Snow and winds are likely to trigger flight cancellations and cause headaches for people traveling to DC for Inauguration Day.

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.

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.

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says.

Arctic winds from a powerful polar vortex are sweeping across several ... to the east coast—including major cities such as Washington, D.C., and Philadelphia—are under weather alerts.

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... wardrobes for hats and gloves. Washington, D.C., received heavy snow as President-elect ...

with forecasts calling for the dreaded combo to spread eastward toward Washington, D.C. in the coming days. The polar vortex of ultra-cold air usually stays penned up around the North Pole, spinning like a top. But sometimes it escapes or stretches down to ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... for warm hats and gloves. Washington, D.C., received heavy snow as President-elect ...

A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped ... for warm hats and gloves. Washington, D.C., received heavy snow as President-elect ...

Cities across the U.S. are bracing for cold temperatures as a polar vortex arrives, bringing temperatures down to much below normal for mid-to-late January. Parts of Utah are on the "very western fringe" of a cold front that will bring in air from the Arctic.

People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, a meteorologist says. That includes Kansas City, which is set to host a Chiefs playoffs game this weekend.