A powerful Polar Vortex in the stratosphere brings frigid temperatures to US
The polar vortex's blast of Arctic air from Canada brought the season's coldest weather to the majority of U.S. The vortex is ...
Wisconsinites woke up to bitter cold weather, schools closed. Is a polar vortex to blame?
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 ...