A reinforcing shot of bitter, Arctic air will soon prolong the long - lived
cold outbreak across the Plains, Midwest, South and East into the end of this week, likely shattering more daily records and sending wind chills to dangerously cold levels.
The negative AO is often associated with milder weather in the Arctic but severe winter weather, including
cold - air or Arctic
outbreaks and snowstorms
across the mid-latitudes including the Eastern United States, Europe and East Asia.