The polar vortex is a large area of cold, spinning air that sits near the North Pole and exists year-round. When it weakens or shifts, Arctic air can spill south, increasing the risk of snow and ...

Behind the disruption lies a powerful atmospheric force that shapes how Arctic cold escapes south. The BBC reports that more than 160 million Americans are expected to be affected by the current ...

Add Yahoo as a preferred source to see more of our stories on Google. A potentially major snow storm this weekend could give way to a blast of Arctic air for the second consecutive week. The next ...

Add Yahoo as a preferred source to see more of our stories on Google. This winter’s harsh run is intensifying, with some of the coldest air so far this season plunging into New Hampshire this weekend ...

The weather forecast is looking promising for warmer weather as the calendar turns to March. In the East, a dramatic warm-up is in the forecast, and the Climate Prediction Center's outlook for March 6 ...

A severe winter storm that brought crippling freezing rain, sleet and snow to a large part of the U.S. in late January 2026 left a mess in states from New Mexico to New England. Hundreds of thousands ...

A polar vortex split is expected to bring frigid Arctic air to the Great Lakes and Northeast later this month. Temperatures could drop 15 to 25 degrees below normal, with single-digit lows possible in ...

A polar vortex split high in the stratosphere is expected to send frigid Arctic air toward Michigan and the Great Lakes. The event could bring colder-than-normal temperatures and late frosts to the ...

Welcome to the Frozen Apple. Temperatures in New York City have remained below freezing since Friday — and they’re expected to stay that way until at least early next week as arctic air has settled ...