When this vortex weakens, it can send frigid air from the Arctic southward, bringing dangerously cold temperatures to mid-latitude regions like the southern United States. In 2021, the polar ...
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 .
"This occurs fairly regularly during wintertime and is often associated with large outbreaks of Arctic air in the United States," NWS has said. Like the jet stream, the polarvortex spins around ...