Two newly identified patterns in the stratospheric polar vortex can send cold air over North America to cause extreme cold ...

A powerful arctic cold front arrived in Colorado on Friday and will keep the state very cold until Wednesday. The 9NEWS Weather Impact Team has issued 9NEWS Weather Impact Days for Saturday ...

Denver is soldiering through a blast of freezing cold and snow Saturday morning, as winter weather generated by a polar vortex continues to hit the Front Range. National Weather Service ...

Colorado will see its coldest temperatures of the winter as a mass of cold air descends on the state from the Artic. But despite the bitter cold, this weather event is not a polar vortex.

Tuesday morning will be cold enough to delay the start of school for some districts on the Front Range.

BOULDER, Colo. — The polar vortex that moved in Friday is finally releasing its icy grip on Colorado, but not before leaving us with another night of subzero temperatures. The National Weather ...

Colorado weather: Forecast, road conditions, closures, Denver International Airport delays as extreme cold temperatures hit the Denver metro from a polar vortex of arctic cold.

The United States has been at the epicenter of the planet’s most unusually cold conditions early in 2025. The polar vortex is to blame.

The Arctic air mass will be in Colorado Friday afternoon, but the effects of the polar vortex won't be fully felt until after the sun goes down.

Extreme Weather The polar vortex will soon hit the U.S. See how cold it’ll get where you live This will spell dangerously cold temperatures — as cold as minus-20 to minus-30 in some states ...

These polar vortex stretches are happening more frequently as the world — and especially the Arctic — warms, a 2021 paper published in the journal Science, also co-authored by Cohen, demonstrated.

Colorado will see its coldest temperatures of the winter as a mass of cold air descends on the state from the Artic. But despite the bitter cold, this weather event is not a polar vortex.