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

The Arctic blast highlights the contrasting weather extremes gripping the country as wildfires burn up California and ...

I’ve been convinced that we are about to experience a very serious and dangerous weather episode,” Houston Mayor John ...

A potent cold front will enter the north-central U.S. before roaring across much of the rest of the nation over the weekend.

Major winter storm brings heavy snow to East Coast as Arctic blast puts millions under warnings from Plains to Maine ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the ...

A series of cold fronts the last few weeks has kept Florida downright chilly, as another winter storm starts to take aim this ...

At least 10 people have died. Officials warned that arctic cold will persist for another day, and roads could remain ...

A mass of air called the polar vortex has escaped the Arctic and plunged southward. Some scientists see the fingerprints of climate change.

The coldest temperatures of the winter season are still ahead. A new arctic blast of polar air is predicted to push down into ...

An arctic blast will send wind chills plummeting below zero through Monday, Tuesday, and Wednesday. Unusually cold air ...

A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder ...