After a record-breaking Gulf Coast storm, cities like New Orleans and Pensacola, Florida, have had more snow this winter than ...
A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of the arctic blast.
The map below shows snowfall as a difference ... During winter, there are two primary plumes of this fast-flowing air: the northern, polar jet stream and the southern, subtropical jet stream.