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 ...

This blast of frozen temperatures is tied to a polar vortex... but what is that? Air spins around the notoriously cold North and South Poles. When the air is spinning fast, it's stable, but when it is ...

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 ...

Plenty of snow is on the way as bitterly cold temperatures spawn snow squalls off the still-unfrozen lakes across Ontario.

Much of the eastern half of the US will this week experience some of the coldest temperatures this winter, if not for several ...

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People living "basically anywhere from the Rockies eastward" will see extremely cold temperatures over the next several days, ...

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S.

ANNAPOLIS, Md. (AP) — A huge swath of the U.S. was blasted with ice, snow and wind on Monday as the polar vortex that dipped south over the weekend kept much of the country east of the Rockies ...

An area stretching from Texas to Tennessee is bracing for the expected arrival of freezing rain and snow, as some other parts of the country that already received an arctic blast this week are prepari ...