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

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

Winter has settled in for the long haul, and the next few days only reinforce that feeling. Tonight brings mostly cloudy ...

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.

Moreover, the latest data suggests that the Polar Vortex is on the verge of a significant disruption due to a new SSW event. The disruption is expected to lead to a colder pattern across the United ...

Inches of snow could blanket Texas towns shortly after a blizzard threat cleared.

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