Tuesday was MD's coldest day of the winter. The arctic blast brought sub-zero wind chills Wednesday. When will the cold snap end?

There’s a chance of snow this weekend before temperatures are expected to drop to the single digits next week due to a blast of arctic air.

Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around the poles, making winter weather more chaotic.

Marylanders are bracing for the upcoming polar vortex, expected to bring temperatures into the single digits early this week. And state workers are out and getting ready for the freezing temperatures.

The National Weather Service calls for more above-freezing temperatures Saturday, expected to be mostly sunny with a high near 38 and a low of 30.

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.

The Inner Harbor is more than 90% frozen, according to the U.S. National Ice Center.

President-elect Donald Trump's second inauguration will mark the coldest presidential ceremony in more than 40 years.

With last week's freeze being the second time temperatures dipped below freezing this winter, many are wondering if this active winter pattern is setting the stage for an even colder February.

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

Understanding the Polar Vortex The polar vortex is like a massive whirlpool of frigid air moving around our planet's poles. Think of it as a barrier that, when strong, keeps icy polar air trapped up north.

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the record-breaking blast of cold, snow and wintry conditions that reached all the way to the Gulf Coast this week.