A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...

An unusually strong jet stream over the Atlantic bringing Storm Eowyn to the UK and Ireland is so powerful it pushed a flight ...

How the Polar Vortex Can Bring Arctic Blasts to the U.S. Vast weather patterns can carry blasts of frigid air far from the ...

It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...

Even the Mississippi Coast will take a hit. Biloxi is expected to experience several nights with lows at or below freezing.

A potent surge of Arctic air starts settling in Monday evening as a massive dip in the jet stream pulls in frigid air across ...

The animation below illustrates the Futurecast 850 millibar Temperature, which clearly shows the Arctic Air spilling south.

Much of Mississippi is expected to see temperatures in the teens this weekend and into next week, with even Gulf Coast lows ...

A powerful pattern is setting the stage for an amplified jet stream that will shunt cold air south, and the roots of this ...

The 'arctic express' is set to blast the Eastern US with another round of frigid air this week, sending temperatures plummeting 10 to 20 degrees F below average. The jetstream will carry a blast ...

You're definitely going to get some very cold temperatures." The cause of it is a shift in the Arctic jet stream. "The jet stream is allowing it to drop down into the U.S.," Carpenter said.