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

and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts. The first weather maps in the 19th century were drawn well after the fact to help devise a ...

and cloud cover onto a geographical map to help find synoptic scale features such as weather fronts. The first weather maps in the 19th century were drawn well after the fact to help devise a ...

Another Arctic blast has been forecast to bring frigid air to a large section of the United States later in January.

A messy spell of winter weather continued to dominate Thanksgiving ... Nolan said Wednesday a cold front attached to the wintry storm system was threatening most of that region with possible ...