The Current Temperature map shows the current temperatures color ... In most of the world (except for the United States, Jamaica, and a few other countries), the degree Celsius scale is used ...

According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, ...

These live maps from the FOX Forecast Center show the latest information on the historic winter storm expected to blanket the ...

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

Myriad winter weather alerts and warnings remained in place across the U.S. on Tuesday as multiple states battled storms.

As the West Coast braces for fiery winds and the Northeast shivers under a polar vortex, the nation finds itself caught between two extreme weather fronts.

Most of the United States is being assailed with extreme winter weather this week as Arctic air blasts south from Canada, ...

Follow NBC News live updates for the latest coverage of the freezing winter weather affecting large swaths of the U.S., from ...