These severe cold events occur when the polar jet stream – the familiar jet stream of winter that runs along the boundary ...

Polar vortex again taking aim at Florida While ... Some young citrus trees were split, compromising their health and future productivity, the analysts said. Joyner, of industry group Florida ...

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Every once in a while, the polar vortex gets split into two centers of circulation, one of which can sink southward into North America. This lasts a couple of weeks before it becomes a single ...

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 ...

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

WASHINGTON — Get ready for extreme cold weather in D.C. and most of the U.S. over the next few days. The polar vortex has ...

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 ...

We start the following work week with a polar vortex. This will bring in unseasonably cold air to the region and wind chill ...