"Bitter cold could linger through the end of the month," the Weather Prediction Center said in an update on Monday.

A chilling polar vortex is set to bring snow and ice to the South and East this week. We show where.

A significant portion of the U.S. is experiencing below-average temperatures due to a disrupted polar vortex, affecting over ...

Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still around.

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.