The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges southward into the U.S., ...

The immense storm system brought disruption to areas of the country that usually escape winter’s wrath, downing trees in some Southern states, threatening a freeze in Florida.

In Kentucky’s biggest city, Louisville, Hugh Ross used his shovel Monday to break sheets of ice that were covering his driveway. Frozen rain fell atop snow that arrived Sunday, which he said ...