Polar Vortex, Arctic Blast

A polar vortex dipping down from Siberia is bringing a cold front with frigid temperatures to millions Americans. See maps of ...
It's like "bomb cyclone" or "firenado." It seems like the sort of phenomenon that would be responsible for the ...
Here's the latest on the winter storm. A historic winter storm is poised to produce potentially record-breaking snows from ...
An Arctic blast that began in the northern plains on Saturday spread bitter cold from the Rockies through the East Coast and ...
Another blast of Arctic air is set to sweep across the South early next ... polar air comes south sometimes where the ...
A series of disturbances in the atmosphere is sending the polar vortex south (again) next week with a burst of even colder ...
Most of the U.S. will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send ...
Anytime we get an Arctic air blast down this far south, this is an artifact of the polar vortex rearing its ugly head,” said climatologist Barry Keim .
The unseasonable chill that has swept through the eastern half of the US defies last year's mild winters and the South's ...