The phrase “historic polar vortex” evokes a country locked in ice from the Great Lakes to the Gulf, but the most reliable records show a patchwork of extreme outbreaks rather than a single, weeks-long ...

A polar vortex is a large, low-pressure system of cold air that typically resides near the Earth’s poles, surrounded by ...

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...