According to the National Weather Service, a polar vortex will impact most of the country this weekend, here is what you need ...
This blast of cold weather is due to activity of the polar vortex.
Starting this week into next, a lobe of the polar vortex will descend into the U.S. and bring with it brutally cold ...
Imagine the polar vortex as a giant, icy whirlpool far above the Earth, keeping frigid Arctic air contained near the north ...
A recent study explains how warmer temperatures at the top of the planet destabilize the jet stream and allow colder air to ...