The most unusually cold air in the Northern Hemisphere will be over the United States early next week, bringing dangerously ...

The cold temperatures are coming from a not uncommon expansion in the Polar Vortex, which are counter-clockwise rotating air ...

The intense cold snap about to settle over most of Canada and the U.S. has been dubbed a “polar vortex’, but Environment ...

Some areas of the U.S. may see temperatures as low as -20 or -30 degrees early next week as arctic air from Siberia rolls in.

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S.

dry air associated with the polar vortex will confine the storm activity to a narrow corridor in the Deep South. In another scenario, more widespread moisture from the Gulf of Mexico would spread ...

A winter storm sweeping through the U.S. South on Tuesday was dumping snow at levels millions of residents haven’t seen ...

As they describe it, the polar vortex circles the north pole counterclockwise. the polar jet stream circles at a lower level ...

A mix of sleet, snow and freezing rain is expected to fall on a stretch of the U.S. from New Mexico to Alabama starting ... and North Carolina coasts. The polar vortex of ultra-cold air usually ...

A mix of sleet, snow and freezing rain is expected to fall on a stretch of the U.S. from New Mexico to Alabama starting ... with employees working remotely. The polar vortex of ultra-cold air ...