Forecasters are warning that the breakdown of the polar vortex high above the Arctic will not bring relief from winter, but ...
Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.
Sudden stratospheric warming is expected to keep a weakened vortex splintered, plunging the region back to record-breaking ...
Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.