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 ...
"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 ...
The polarvortex is like a giant ... though La Nina does produce more big disruptions than other years. That cold arcticblast can last anywhere from a few days to a few weeks.