See the travel restrictions and other information in the linked file
Extreme cold temperatures and windchill are expected over the next several days, be prepared.
National Weather Service Office, Louisville: http://www.crh.noaa.gov/lmk/
Weather Channel / weather.com:
http://www.weather.com/weather/today/l/USKY0919:1:US
Federal preparedness info: http://www.ready.gov/winter-weather