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 ...

The start of May in Pennsylvania brings colder-than-average temperatures, thanks to the lingering effects of the polar vortex. The weather pattern is normally found around the North Pole, but activity ...

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 ...

The stratospheric polar vortex is entering its seasonal collapse. But that doesn’t mean calm weather is coming. What's expected for April weather?

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 ...

After sending temperatures plunging across Michigan this winter, the polar vortex has retreated. As if we hadn't noticed. "We are actually on the opposite side of it, on the warmer side," said Jaclyn ...

A polar vortex split is expected to bring frigid Arctic air and single-digit temperatures to Ohio and the Great Lakes region later this month. The event is a full split of the vortex, which could lock ...