Polar Vortex has split into two, with one part centering over Bering
Strait (left) and the other part centering over Fram Strait/Greenland
(right), while the Polar Vortex is reaching speeds over the Arctic as
high as 416 km/h or 259 mph (green circle).
image shows the situation on January 18, 2018, 15:00 UTC. Created by
Sam Carana for Arctic-news.blogspot.com with nullschool.net image.