A weakened polar vortex is expected to keep much of the Midwest and Northeast cooler than average this May, potentially making it one of the chilliest in recent years. The Weather Company and ...

A shift in the polar vortex earlier this spring is helping to set the stage for repeated chilly stretches across the central and eastern United States in the weeks ahead, with below-average days ...

CHICAGO — The polar vortex is back and the forecasts are dire: A quick punch of snow, followed almost immediately by a life-threatening level of cold that a generation of Midwesterners has never ...

Long after one blast of Arctic air pushed offshore last week, a new surge of cold air, driven by a breakdown of the polar vortex, expanded from central Canada and to the Midwest on Sunday and will ...

Frigid temperatures are expected to impact much of the central and eastern United States in the coming weeks. The first of three polar vortex systems is expected this month, according to AccuWeather.