NOAA
America's winter has been particularly mild or nasty, depending on which coast is closer.
Anchorage, Alaska, in January was warmer than New York and Philadelphia.
California had its third-driest January since 1895 while Fort Wayne, Indiana saw the snowiest month ever. And while California's drought continues, Philadelphia deals with the aftermath of an unprecedented fourth 6-inch snowstorm of the season.
Mashable notes that East/West split in January temperates occurred as "the result of a buckle in the jet stream that rerouted Pacific storms north."
Consequently, the two sides of America are experiencing very different winters.