- Frigid temperatures ushered in by this week's polar vortex this week will make a quick exit out of the area Saturday, forecasters said.
A polar vortex is a large area of low pressure and cold air that usually stays near the Earth's North and South Poles. Two pieces of arctic air broke off this week, sending frigid air south into the United States, according to The National Weather Service.
"This is the coldest air we've had in this area in awhile," William and Mary professor Chuck Bailey said Friday. "We had a really mild November, so it makes the cold more memorable."
Warmer, more seasonable air will push the cold air out and return temperatures...