A winter storm could bring up to 7 inches of snow in the Great Smoky Mountains. Drivers should be prepared for closures and delays.
A developing winter storm is threatening to drop snow, sleet and freezing rain on parts of Texas, Oklahoma and Arkansas.
The cold snap will continue for most into tomorrow.
Frigid air that normally stays trapped in the Arctic has escaped, plunging deep into the United States for an extended visit that is expected to provoke teeth-chattering but not be record-shattering.
The National Weather Service said that wind chill temperatures could dip into the teens to low-20s from Texas across the Gulf Coast.