Most of Mississippi can expect temperatures below ... As they describe it, the polar vortex circles the north pole counterclockwise. the polar jet stream circles at a lower level of the atmosphere ...

Then, parts of Mississippi can expect days of frigid Arctic cold tied to the polar vortex with overnight lows in the teens through the weekend. It's part of a larger storm system -- Winter Storm ...

BISMARCK, N.D. (AP) — Harsh cold descended on the nation’s midsection Monday as a polar vortex gripped the ... Tennessee, Mississippi, Alabama, West Virginia, Virginia and Ohio.

Several days with temperatures of 10-20 degrees below the historical average could be dangerous to plants and ruin outdoor ...

The Polar Vortex in the upper atmosphere has disintegrated ... The big storm clusters that moved from the mid-Mississippi into the Tennessee Valley have caused severe flooding problems.

A pinwheeling section of the polar vortex is clearing customs at the Canadian border, heading for the northern Plains, Midwest, Mid-Atlantic and Northeast U.S. For millions, this may be the ...

The cause of the week-long deep freeze? A polar vortex collapse. Now, meteorologists are calling for another collapse in the middle of March, one that could plunge the U.S., Canada, and parts of ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe.