Earth’s magnetic north is not static. Like an anchorless buoy pushed by ocean waves, the magnetic field is constantly on the move as liquid iron sloshes around in the planet’s outer core.

It's time to recalibrate the navigation systems on ships, airplanes, as the position of the magnetic North Pole is officially being changed, continuing its shift away from Canada and towards Siberia.

Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be

Like much of the U.S., Wisconsinites woke up Tuesday morning to bitter cold conditions. Many schools and colleges throughout the Milwaukee area closed as the area braced for the dangerous freezing temperatures. But is Wisconsin in a polar vortex? And what is a polar vortex anyways? Here's what to know.

Millions of people across the northern Gulf Coast braced Tuesday for a rare winter storm that’s expected to scatter heavy snow, sleet and freezing rain around the Deep South as a blast of

According to the NWS, the Arctic polar vortex is a powerful band of west-to-east winds that develops in the stratosphere, about 10 to 30 miles above the North Pole, during the winter season. It is always present near the poles, though it weakens during summer and intensifies in winter.

Residents across the country from the Northern Plains to the tip of Maine are bracing for dangerously low temperatures as tens of millions of residents along the East Coast contend

Much of the U.S. from the Rockies into the Northern Plains will see colder than normal temperatures starting Sunday into the coming week, including forecasted wind chills down to minus 40 degrees F (minus 40 degrees C) or colder in the Dakotas and northern Minnesota, National Weather Service Meteorologist Marc Chenard said.

It's going to get cold in Tennessee. Meteorologists predict freezing temperatures for much of the state. Here's the latest.

An Arctic air mass, sometimes known as a Siberian Express, is expected to move over Michigan by Sunday and will leave Michigan residents with below-zero temperatures for days, the National Weather Service said.

This expert says snowfall in the U.S. South shows'we can’t ignore winter' in changing climate::Houston, Texas:: Bob Henson, Meteorologist, Science writer“What happened this week in the Gulf Coast shows us we can't ignore winter either.

An arctic blast will send temperatures across the United States plummeting as bitterly cold air that originated in Siberia will arrive from Canada by week’s end, bringing with it dangerously cold wind chills for millions of Americans.