Two newly identified patterns in the stratospheric polar vortex can send cold air over North America to cause extreme cold snaps, but the parts of the country that suffer differ between them. Those ...

Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still ...

When the polar vortex stumbles, the weather at ground level can pivot from mild to brutal in a matter of days. A circulation that usually spins quietly above the pole can suddenly send lobes of Arctic ...

Moreover, the latest data suggests that the Polar Vortex is on the verge of a significant disruption due to a new SSW event. The disruption is expected to lead to a colder pattern across the United ...

Face it — "polar vortex" is fun to say. It sounds like something that could have killed a red-shirted crewmember on the original "Star Trek" television series. Maybe that's why a weather feature that ...

Stephen has degrees in science (Physics major) and arts (English Literature and the History and Philosophy of Science), as well as a Graduate Diploma in Science Communication. Stephen has degrees in ...