Temperatures expected to plunge 10- to 20-degrees below normal.
As the polar vortex heads southward, ‘Areas from the northern and central Plains to the Great Lakes, the upper Gulf Coast and the Appalachians will feel significant impact from the arctic outbreak,’ said AccuWeather Long Range Expert Paul Pastelok.
‘It is possible single-digit low temperatures occur in parts of the northern Plains and the Upper Midwest, away from the Great Lakes with temperatures plunging to 20 degrees below average in parts of the South,’ Mr Pastelok said.
Worst hit will be Fargo, Minneapolis, Chicago, St. Louis and Cincinnati.
Americans are warned to take steps to combat hypothermia and frostbite in the north, and southern states are being urged to break out the winter coats.
Thanks to Bill Sellers for this link