displacing the vortex from its normal position at the poles and possibly moving it over the U.S. A polar vortex collapse is expected over the next two weeks, potentially bringing cold air and snow ...

It’s really, really cold again – as the US shivers through at least the eighth blast of air from the Arctic this winter. Here’s why it keeps happening.

The most unusually cold air in the Northern Hemisphere will move into the Plains and Midwest this weekend as the polar vortex lobe zaps the country like a jellyfish tentacle. Temperatures may be ...

Meteorologists also project a few rainy days ahead, which should aid in relieving areas of New England experiencing weak to ...

“And when that happens, the vortex can move and displace, and as that happens, that process of the coldest air from way up above in the upper atmosphere can translate down to the lower levels.