NBC Boston on MSN6 天
What is a polar vortex? And what does it mean for us next week?
Some of the coldest air in years is expected to plunge into the High Plains, Midwest and finally the East in the coming days ...
WRAL News on MSN8 天
Ask the Meteorologist: What is the polar vortex, and why do we care?
Stable polar vortex: When the stratosphere over the Arctic is cold, it's considered stable. The wind around the polar vortex ...